1.
The epidermis is the thickest and innermost layer of the skin.
Correct Answer
B. False
Explanation
The given statement is false. The epidermis is actually the thinnest and outermost layer of the skin, not the thickest and innermost layer. The epidermis is responsible for protecting the body from external factors and regulating water loss. It is composed of several layers of cells, including the outermost layer called the stratum corneum. The thickest layer of the skin is the dermis, which lies beneath the epidermis and contains various structures such as blood vessels, hair follicles, and sweat glands.
2.
The two classifications of bacteria are non - pathogenic and pathogenic.
Correct Answer
A. True
Explanation
The statement is true because bacteria can be classified into two main categories: non-pathogenic and pathogenic. Non-pathogenic bacteria are harmless and do not cause diseases in humans or animals. They can even have beneficial effects, such as aiding in digestion or producing vitamins. On the other hand, pathogenic bacteria are capable of causing diseases and infections. They can invade the body and harm the host by releasing toxins or damaging tissues. Therefore, the statement accurately represents the two classifications of bacteria.
3.
Non-pathogenic bacteria make up the majority of bacteria, and have many beneficial functions, such as decomposing waste.
Correct Answer
A. True
Explanation
Non-pathogenic bacteria are bacteria that do not cause disease or harm to humans or other organisms. They make up the majority of bacteria and have several beneficial functions. One of these functions is decomposing waste, which helps in the breakdown and recycling of organic matter. This process is essential for maintaining ecosystem balance and nutrient cycling. Therefore, the statement that non-pathogenic bacteria have many beneficial functions, such as decomposing waste, is true.
4.
Pathogenic organisms (also known as germs), cause considerable damage because they produce disease. They invade plant life and living tissue.
Correct Answer
A. True
Explanation
Pathogenic organisms, also known as germs, are capable of causing disease as they invade plant life and living tissue. This invasion leads to significant damage and disruption to the normal functioning of the affected organisms. Therefore, the statement "Pathogenic organisms cause considerable damage because they produce disease and invade plant life and living tissue" is true.
5.
Bacteria thrives in cold, bright, and dry, generally dirty places.
Correct Answer
B. False
Explanation
Bacteria do not thrive in cold, bright, and dry places. They prefer warm, moist, and dirty environments to grow and reproduce. Therefore, the statement is false.
6.
Viruses can not replicate without the help of a host cell
Correct Answer
A. True
Explanation
Viruses are infectious agents that cannot replicate or reproduce on their own. They lack the necessary cellular machinery and metabolic processes required for replication. Instead, they rely on host cells to provide the necessary resources and machinery for their replication. Once inside a host cell, viruses hijack the cellular machinery to produce more copies of themselves. This process eventually leads to the destruction of the host cell and the release of new virus particles, which can go on to infect other cells. Therefore, the statement that viruses cannot replicate without the help of a host cell is true.
7.
The common cold is caused by a virus.
Correct Answer
A. True
Explanation
The common cold is caused by a virus, typically rhinovirus or coronavirus. These viruses are highly contagious and can be easily transmitted through respiratory droplets from an infected person. They infect the nose and throat, leading to symptoms such as runny nose, sore throat, cough, and congestion. Antibiotics are ineffective against the common cold since it is caused by a viral infection. Therefore, the statement "The common cold is caused by a virus" is true.
8.
Blood-borne pathogens can be found in the blood stream of infected people; and the parasite might be spread to other people through exposure to an infected person's blood, for example, by blood transfusion or by sharing needles or syringes contaminated with blood.
Correct Answer
A. True
Explanation
Blood-borne pathogens are infectious microorganisms that can be present in the bloodstream of infected individuals. These pathogens can be transmitted to others through various means, such as blood transfusions or sharing contaminated needles or syringes. Therefore, it is true that the parasite can be spread to other people through exposure to an infected person's blood.
9.
Ticks, lice, and mites are classified as a Protozoa parasite.
Correct Answer
B. False
Explanation
Ticks, lice, and mites are not classified as Protozoa parasites. They are actually classified as Arthropod parasites. Protozoa parasites are single-celled organisms, while ticks, lice, and mites are multi-cellular organisms belonging to the arthropod group.
10.
Melasma are dark brown, symmetric patches of pigment on the face.
Correct Answer
A. True
Explanation
Melasma refers to the presence of dark brown, symmetric patches of pigment on the face. This condition is typically characterized by the appearance of these patches, which are usually brown in color and can vary in size and shape. Melasma is commonly seen in women and is often associated with hormonal changes, such as those that occur during pregnancy or while taking birth control pills. The statement that melasma are dark brown, symmetric patches of pigment on the face is true.
11.
Melanin gives color to the skin, hair, and iris of the eyes.
Correct Answer
A. True
Explanation
Melanin is a pigment that is responsible for giving color to the skin, hair, and iris of the eyes. It is produced by specialized cells called melanocytes. The amount and type of melanin present in these cells determine the color of these body parts. Therefore, it is true that melanin gives color to the skin, hair, and iris of the eyes.
12.
Ichthyosis causes tumors under the skin and darker pigmented spots on the skin.
Correct Answer
B. False
Explanation
The statement is false. Ichthyosis is a group of genetic skin disorders that cause dry, scaly skin. It does not cause tumors under the skin or darker pigmented spots on the skin. These symptoms may be associated with other skin conditions or diseases, but not with ichthyosis.
13.
The most noticeable sun-induced pigment change is a freckle or solar lentigo.
Correct Answer
A. True
Explanation
The statement is true because freckles or solar lentigines are indeed a common and noticeable change in skin pigmentation caused by sun exposure. These small, flat, tan or light brown spots are more common in fair-skinned individuals and tend to appear on areas of the skin that are frequently exposed to the sun, such as the face, arms, and shoulders. They are caused by an increase in the production of melanin, the pigment that gives color to the skin, as a natural response to protect the skin from further sun damage.
14.
Dermatology is the study of the causes of diseases.
Correct Answer
A. True
Explanation
Dermatology is a branch of medicine that focuses on the study and diagnosis of skin diseases. It involves examining the causes, symptoms, and treatments for various skin conditions. Dermatologists are trained to identify the underlying factors that contribute to these diseases, such as genetic predisposition, environmental factors, and lifestyle choices. By understanding the causes of diseases, dermatologists can provide appropriate care and treatment to their patients. Therefore, the statement "Dermatology is the study of the causes of diseases" is true.
15.
A subjective symptom is a symptom that can be seen but not felt.
Correct Answer
B. False
Explanation
A subjective symptom is a symptom that can be felt but not seen. This means that the individual experiencing the symptom can describe and report it, but it may not be physically observable by others.
16.
Vitiligo is a skin condition in which there is a loss of pigment from areas of skin, resulting in irregular white patches that feel like normal skin.
Correct Answer
A. True
Explanation
Vitiligo is a skin condition characterized by the loss of pigment in certain areas of the skin, leading to the formation of white patches. These patches appear similar to normal skin and can be felt as such. This statement accurately describes the characteristics of vitiligo, making the answer "True" correct.
17.
Doctors believe psoriasis occurs when the body's immune system mistakes healthy cells for dangerous substances.
Correct Answer
A. True
Explanation
Psoriasis is a chronic autoimmune disease that causes the rapid buildup of skin cells. The immune system mistakenly attacks healthy skin cells, causing inflammation and the formation of red, itchy, and scaly patches on the skin. This occurs due to a malfunction in the immune system, which identifies the body's own cells as harmful and triggers an immune response. Therefore, the statement that doctors believe psoriasis occurs when the body's immune system mistakes healthy cells for dangerous substances is true.
18.
Contact dermatitis is an inflammation of the skin caused by direct contact with an irritating or allergy-causing substance.
Correct Answer
A. True
Explanation
Contact dermatitis is indeed an inflammation of the skin that occurs when the skin comes into direct contact with a substance that irritates or causes an allergic reaction. This condition is characterized by symptoms such as redness, itching, and swelling in the affected area. Therefore, the statement "Contact dermatitis is an inflammation of the skin caused by direct contact with an irritating or allergy-causing substance" is true.
19.
Scalp ringworm is extremely contagious, especially among children. It occurs mainly in children between the ages of 15 to 18.
Correct Answer
B. False
Explanation
The given answer is false because the statement contradicts itself. It states that scalp ringworm is extremely contagious, especially among children, but then it specifies that it occurs mainly in children between the ages of 15 to 18. This inconsistency suggests that the information provided is incorrect.
20.
Acne occurs when tiny holes on the surface of the skin, called pores, become clogged.
Correct Answer
A. True
Explanation
Acne is a common skin condition that occurs when the pores on the skin become clogged with oil, dead skin cells, and bacteria. This leads to the formation of pimples, blackheads, and whiteheads. Therefore, the statement that acne occurs when pores become clogged is true.
21.
A developing fetus has all of it's hair follicles formed by week 2 of its life.
Correct Answer
B. False
Explanation
This statement is false. Hair follicles start forming in a developing fetus around week 14 of its life, not week 2. At week 2, the fetus is still in the early stages of development and many of its major organs and structures have not yet formed. Hair follicles develop later in the pregnancy as part of the fetus's overall growth and development.
22.
The stages of hair growth are catagen, telogen, and anagen.
Correct Answer
A. True
Explanation
The statement is true. The stages of hair growth are indeed catagen, telogen, and anagen. During the anagen phase, the hair actively grows, while in the catagen phase, it transitions and prepares for the resting phase called telogen. After telogen, the hair falls out, and the cycle starts again with anagen.
23.
Recognizing skin aliments is required to confidently refer clients to a physician or dermatologist when necessary.
Correct Answer
A. True
Explanation
Recognizing skin ailments is important for professionals in the beauty or skincare industry as it enables them to identify potential issues and refer clients to a physician or dermatologist for further evaluation or treatment. This helps ensure that clients receive appropriate care and attention for their skin concerns, promoting their overall health and well-being. Therefore, the statement is true.
24.
HIV is the virus that can lead to acquired immune deficiency syndrome, or AIDS.
Correct Answer
A. True
Explanation
HIV, or Human Immunodeficiency Virus, is indeed the virus that can cause acquired immune deficiency syndrome, or AIDS. HIV weakens the immune system over time, making it difficult for the body to fight off infections and diseases. If left untreated, HIV can progress to AIDS, which is the final stage of the infection. Therefore, the statement "HIV is the virus that can lead to acquired immune deficiency syndrome, or AIDS" is true.
25.
Being infected with HIV is the same as having AIDS.
Correct Answer
A. True
Explanation
This statement is incorrect. Being infected with HIV (Human Immunodeficiency Virus) does not mean that a person has AIDS (Acquired Immunodeficiency Syndrome). HIV is the virus that causes AIDS, but not all individuals infected with HIV will develop AIDS. AIDS is the final stage of HIV infection, characterized by a severely weakened immune system and the presence of opportunistic infections. It can take several years for HIV to progress to AIDS, and with proper medical care and treatment, people living with HIV can lead long and healthy lives without developing AIDS.
26.
People with HIV have been known to stay healthy for years, even decades, with proper treatment.
Correct Answer
A. True
Explanation
People with HIV can live long and healthy lives with the proper treatment. Antiretroviral therapy (ART) helps to suppress the virus and allows individuals to maintain a strong immune system. With consistent medication adherence and regular medical care, people with HIV can manage the virus and prevent it from progressing to AIDS. This has led to many individuals living for years, and even decades, with HIV while maintaining good health. Therefore, the statement is true.
27.
Official tracking of AIDS cases in the United States began in 1922.
Correct Answer
B. False
Explanation
The statement is false because official tracking of AIDS cases in the United States did not begin in 1922. The first recognized cases of AIDS in the United States were reported in 1981, and it wasn't until 1982 that the Centers for Disease Control and Prevention (CDC) began tracking and reporting cases of AIDS. Therefore, the correct answer is false.
28.
HIV can be spread by Not using a condom when having sex with a person who has HIV.
Correct Answer
A. True
Explanation
HIV can be spread through sexual contact with an infected person, particularly if a condom is not used. This is because HIV is present in certain body fluids, including blood, semen, vaginal fluids, and breast milk. When engaging in sexual activities without a condom, there is a risk of direct contact with these fluids, allowing the virus to enter the body and potentially cause infection. Therefore, it is important to use condoms consistently and correctly to reduce the risk of HIV transmission during sexual intercourse.
29.
HIV can be spread by shaking hands.
Correct Answer
B. False
Explanation
HIV cannot be spread by shaking hands. HIV is primarily transmitted through sexual contact, sharing needles or syringes, and from mother to child during childbirth or breastfeeding. Shaking hands does not provide a route for the virus to enter the body. It is important to educate oneself about the modes of HIV transmission to prevent the spread of the virus.
30.
Among all racial/ethnic groups, the highest estimated prevalence rate of AIDS diagnoses was that for blacks/African Americans .
Correct Answer
A. True
Explanation
The statement is true because among all racial/ethnic groups, the highest estimated prevalence rate of AIDS diagnoses is indeed for blacks/African Americans. This means that compared to other racial/ethnic groups, blacks/African Americans have a higher rate of being diagnosed with AIDS. This could be due to various factors such as disparities in healthcare access, socioeconomic factors, and cultural factors that may contribute to higher rates of HIV/AIDS transmission and diagnosis within this particular racial/ethnic group.
31.
TB disease is caused by a bacterium called Mycobacterium
Correct Answer
A. True
Explanation
TB disease is caused by a bacterium called Mycobacterium. This statement is true. Tuberculosis (TB) is an infectious disease caused by the bacteria Mycobacterium tuberculosis. When a person with active TB disease coughs or sneezes, they release bacteria into the air, which can then be inhaled by others and cause infection. TB primarily affects the lungs but can also affect other parts of the body. It is a serious disease that can be life-threatening if left untreated.
32.
TB is spread through the air from one person to another.
Correct Answer
A. True
Explanation
Tuberculosis (TB) is indeed spread through the air when an infected person coughs, sneezes, or talks, releasing tiny droplets containing the bacteria into the air. These droplets can then be inhaled by others, leading to the transmission of TB. Therefore, the statement "TB is spread through the air from one person to another" is correct.
33.
Hepatitis B is a lung disease caused by the Hepatitis B virus (HBV).
Correct Answer
B. False
Explanation
Hepatitis B is not a lung disease, but a liver disease caused by the Hepatitis B virus (HBV). The virus primarily affects the liver, causing inflammation and potentially leading to chronic infection, liver cirrhosis, or liver cancer. It is transmitted through contact with infected blood or other body fluids, such as semen or vaginal fluids. Therefore, the statement that Hepatitis B is a lung disease caused by the Hepatitis B virus is incorrect.
34.
Hepatitis B virus (HBV) and human immunodeficiency virus (HIV) are blood-borne viruses transmitted primarily through sexual contact and injection drug use.
Correct Answer
A. True
Explanation
Hepatitis B virus (HBV) and human immunodeficiency virus (HIV) are indeed blood-borne viruses that are primarily transmitted through sexual contact and injection drug use. This means that these viruses can be spread through activities such as unprotected sex and sharing needles or other drug paraphernalia. It is important to practice safe sex and avoid sharing needles to reduce the risk of contracting these viruses. Therefore, the statement "True" accurately reflects the transmission modes of HBV and HIV.
35.
Hepatitis C infection is chronic and may lead to scarring of the liver or liver cancer.
Correct Answer
A. True
Explanation
Hepatitis C infection is a chronic condition that can cause long-term damage to the liver. If left untreated, it can lead to scarring of the liver, known as cirrhosis, which can eventually progress to liver cancer. Therefore, it is true that hepatitis C infection can result in scarring of the liver or liver cancer.
36.
Initial Symptoms of HIV/AIDS may include, fever, headache, sore throat, swollen lymph glands, and a rash.
Correct Answer
A. True
Explanation
The given statement is true. Initial symptoms of HIV/AIDS can include fever, headache, sore throat, swollen lymph glands, and a rash. These symptoms usually appear within 2-4 weeks after infection and can last for a few days to several weeks. It is important to note that these symptoms are non-specific and can be caused by other illnesses as well. Therefore, it is crucial to get tested for HIV if one suspects exposure or engages in high-risk behaviors.
37.
Only an HIV test can make certain whether a person has HIV or not.
Correct Answer
A. True
Explanation
An HIV test is the only definitive way to determine whether a person has HIV or not. Other symptoms or indicators may suggest the presence of HIV, but only a test can provide a conclusive result. Therefore, the statement is true.
38.
Anti-retroviral drugs are powerful. Taken in combinations of two or more drugs at a time, they can help to slow the HIV infection.
Correct Answer
A. True
Explanation
Anti-retroviral drugs are indeed powerful and can effectively slow down the progression of HIV infection. When taken in combinations of two or more drugs, these medications work synergistically to target different stages of the virus's life cycle, reducing its ability to replicate and spread. By suppressing the viral load, anti-retroviral therapy not only improves the quality of life for individuals living with HIV but also helps to prevent the transmission of the virus to others. Therefore, the statement "Anti-retroviral drugs are powerful. Taken in combinations of two or more drugs at a time, they can help to slow the HIV infection" is true.
39.
Antiretroviral drugs have reduced the death rate from HIV/AIDS by 100%.
Correct Answer
B. False
Explanation
This statement is false because while antiretroviral drugs have significantly improved the prognosis for individuals living with HIV/AIDS, they have not completely eradicated the death rate. Although these drugs can effectively control the virus and delay the progression of the disease, they are not a cure. People with HIV/AIDS still face the risk of complications and opportunistic infections, and in some cases, the disease can still be fatal. Therefore, the death rate from HIV/AIDS has not been reduced by 100%.
40.
Proper, consistent use of a condom, Prevents transmission of HIV by 80-95% .
Correct Answer
A. True
Explanation
Proper and consistent use of a condom is an effective method for preventing the transmission of HIV. It has been found to reduce the risk of HIV transmission by 80-95%. This is because condoms act as a barrier, preventing direct contact between bodily fluids that may contain the virus and the other person. Therefore, the statement that proper, consistent use of a condom prevents transmission of HIV by 80-95% is true.
41.
HIV infection is associated with people that are already stigmatized in many societies: homosexuals, prostitutes.
Correct Answer
A. True
Explanation
HIV infection is indeed associated with certain groups that are often stigmatized in many societies, such as homosexuals and prostitutes. This stigma can lead to discrimination, prejudice, and social exclusion of individuals living with HIV. Therefore, the statement is true as it accurately reflects the social dynamics surrounding HIV infection.
42.
Transmission of HIV is unrelated to human behavior, so changing behaviors that enable HIV transmission is not important.
Correct Answer
B. False
Explanation
This statement is false because transmission of HIV is indeed related to human behavior. HIV is primarily transmitted through behaviors such as unprotected sexual intercourse, sharing needles or syringes, and mother-to-child transmission during childbirth or breastfeeding. Therefore, changing behaviors that enable HIV transmission, such as practicing safe sex, using clean needles, and accessing prenatal care, is crucial in preventing the spread of HIV.
43.
Antiseptic is defined as as substance that inhibits the growth or reproduction of disease causing microorganisms.
Correct Answer
A. True
Explanation
Antiseptic is indeed defined as a substance that inhibits the growth or reproduction of disease-causing microorganisms. This means that it can help prevent the spread of infections and diseases by killing or inhibiting the growth of harmful bacteria, viruses, and other pathogens. Therefore, the statement "Antiseptic is defined as a substance that inhibits the growth or reproduction of disease-causing microorganisms" is true.
44.
The first step in cleaning combs and brushes is removing all the hair and debris from the utensils.
Correct Answer
A. True
Explanation
The first step in cleaning combs and brushes is indeed removing all the hair and debris from the utensils. This is an important step because if the hair and debris are not removed, it can accumulate over time and make the combs and brushes less effective in their function. Additionally, removing the hair and debris allows for a more thorough cleaning of the utensils, ensuring that they are hygienic and ready for use.
45.
Regulated (bio-hazardous) waste includes items that are saturated with fluids containing blood, or items caked with dried blood.
Correct Answer
A. True
Explanation
Regulated (bio-hazardous) waste refers to waste items that are contaminated with fluids containing blood or are covered with dried blood. This includes items such as used syringes, blood-soaked bandages, or clothing stained with blood. These waste materials pose a potential risk of transmitting infectious diseases and therefore require special handling and disposal procedures to ensure the safety of individuals and the environment. Thus, the statement "Regulated (bio-hazardous) waste includes items that are saturated with fluids containing blood, or items caked with dried blood" is true.
46.
The release of oxygen bubbles produces an effervescent action, which is useful for wound cleansing through removal of tissue debris, when using hydrogen peroxide.
Correct Answer
A. True
Explanation
Hydrogen peroxide releases oxygen bubbles when it comes into contact with tissues, creating an effervescent action. This action helps in cleansing wounds by removing tissue debris. Therefore, the statement is true.
47.
Hand washing, when done correctly, is the single most effective way to prevent the spread of communicable diseases.
Correct Answer
A. True
Explanation
Hand washing, when done correctly, is indeed the single most effective way to prevent the spread of communicable diseases. This is because many diseases are transmitted through touch and contact with contaminated surfaces. By washing our hands with soap and water for at least 20 seconds, we can effectively remove germs and reduce the risk of infection. Hand washing is particularly important before eating, after using the restroom, and when caring for someone who is sick. It is a simple yet powerful practice that can significantly contribute to maintaining good personal hygiene and preventing the spread of diseases.
48.
Direct contact route is the type of germ contact occurs by directly touching an infected area or body fluid such as saliva, mucus, eye discharge, pus or spit.
Correct Answer
A. True
Explanation
Direct contact route refers to the transmission of germs through direct physical contact with an infected area or body fluid. This can include touching surfaces or objects contaminated with the germs, as well as coming into contact with bodily fluids like saliva, mucus, eye discharge, pus, or spit. Therefore, the given statement that direct contact route is the type of germ contact that occurs by directly touching an infected area or body fluid is true.
49.
The Universal Precaution Rule is to Treat all human blood, bodily fluids and other potentially infectious materials as if they are infections.
Correct Answer
A. True
Explanation
The Universal Precaution Rule requires healthcare professionals to treat all human blood, bodily fluids, and other potentially infectious materials as if they are infections. This means taking necessary precautions, such as wearing protective equipment, to prevent the spread of diseases. By assuming that all materials are infectious, healthcare professionals can ensure the safety of both themselves and their patients. Therefore, the statement "True" is correct.
50.
Types of Personal Protective Equipment (PPE) include, Gloves, Protective clothing such as aprons or smocks, Eye protective devices such as masks or goggles.
Correct Answer
A. True
Explanation
The statement is true because it correctly lists some examples of personal protective equipment (PPE), including gloves, protective clothing like aprons or smocks, and eye protective devices like masks or goggles. PPE is essential for protecting individuals from potential hazards or risks in various environments, such as workplaces or healthcare settings. These items create a physical barrier between the wearer and potential contaminants, reducing the risk of exposure and promoting safety.