1.
all of the following means clot except which one?
Correct Answer
A. Agglutin/o
Explanation
Agglutin/o does not mean clot. It actually refers to the process of clumping together, usually of red blood cells, in response to a specific antibody. The other options, thromb/o and coagul/o, both mean clot. Therefore, the correct answer is agglutin/o.
2.
which of the following means primitive?
Correct Answer
A. Blast/o
Explanation
The term "blast/o" means primitive. This is because "blast/o" is a combining form that is used to refer to immature or undeveloped cells. It is commonly used in medical terminology to describe cells that are in the early stages of development, such as blastocysts or blast cells. Therefore, "blast/o" is the correct answer as it directly relates to the concept of being primitive or undeveloped.
3.
which of the following is not considered a form element of blood?
Correct Answer
C. Plasma
Explanation
Plasma is not considered a form element of blood because it is a yellowish liquid that carries various components of blood, such as nutrients, hormones, and waste products. It does not have a cellular structure like red blood cells, white blood cells, and platelets, which are all considered form elements of blood.
4.
which of the following is a formed element of blood?
Correct Answer
C. All are correct
Explanation
All of the options listed are formed elements of blood. Red blood cells, white blood cells, and platelets are all cellular components that make up blood. Red blood cells are responsible for carrying oxygen to the body's tissues. White blood cells are part of the immune system and help to fight off infections. Platelets are involved in blood clotting to prevent excessive bleeding. Therefore, all of the options are correct.
5.
If you spin a tube of blood in a centrifuge, what is the bottom layer composed of?
Correct Answer
A. Red blood cells
Explanation
When blood is spun in a centrifuge, the different components of the blood separate based on their density. The bottom layer is composed of red blood cells because they are the heaviest component and settle at the bottom. White blood cells, plasma, and platelets are lighter and therefore separate into different layers above the red blood cells.
6.
if you spin a tube of blood in a centrifuge, what is the top straw layer composed of?
Correct Answer
C. Plasma
Explanation
When a tube of blood is spun in a centrifuge, the different components of blood separate based on their density. The top straw layer is composed of plasma. Plasma is the liquid component of blood that contains various proteins, hormones, electrolytes, and waste products. It is yellowish in color and makes up about 55% of the total blood volume. The other components such as red blood cells, white blood cells, and platelets settle at the bottom of the tube due to their higher density.
7.
if you spin a tube of blood in a centrifuge, which component of the blood is the heaviest?
Correct Answer
A. Red blood cells
Explanation
When a tube of blood is spun in a centrifuge, the heaviest component settles at the bottom due to the force of gravity. Red blood cells are the heaviest component in the blood and therefore settle at the bottom of the tube. This is because red blood cells are denser than white blood cells, plasma, and platelets.
8.
if you spin a tube in a centrifuge, which component of the blood is the most abundant?
Correct Answer
C. Plasma
Explanation
Plasma is the most abundant component of blood when a tube is spun in a centrifuge. This is because plasma makes up about 55% of the total blood volume and contains various substances such as water, electrolytes, proteins, hormones, and waste products. Red blood cells, white blood cells, and platelets are all present in smaller quantities compared to plasma.
9.
what is the most abundant component of plasma?
Correct Answer
D. Water
Explanation
Water is the most abundant component of plasma because it makes up approximately 90% of the total plasma volume. It acts as a solvent, allowing for the transportation of various substances such as nutrients, hormones, and waste products throughout the body. Additionally, water helps regulate body temperature and maintain blood pressure. While albumin, globulin, and fibrinogen are also important components of plasma, they are present in smaller quantities compared to water.
10.
what term describes the antibodies found in plasma?
Correct Answer
B. Globulin
Explanation
Globulin is the correct answer because it is a term that describes the antibodies found in plasma. Antibodies are a type of globulin protein that is produced by the immune system to help fight off foreign substances in the body. These antibodies are found in the plasma, which is the liquid component of blood. Therefore, globulin is the term that specifically refers to the antibodies found in plasma.
11.
what is serum?
Correct Answer
B. Plasma with clotting factors removed
Explanation
Serum is the liquid portion of blood that remains after the clotting factors have been removed from plasma. It does not contain the clotting factors and is often used in medical and diagnostic testing. Another name for serum is not mentioned in the question. Plasma with clotting factors removed is the correct answer as it accurately describes what serum is.
12.
All of the following are Leukocytes except which on?
Correct Answer
A. Thrombocytes
Explanation
Thrombocytes are not leukocytes. Leukocytes, also known as white blood cells, are responsible for fighting infections and diseases in the body. Thrombocytes, on the other hand, are platelets that help in blood clotting. While both play important roles in the body's immune response, thrombocytes are not classified as leukocytes.
13.
Which of the following Leukocytes releases histamine to promote inflammation and herparin as an anticoagulant?
Correct Answer
C. BasopHils
Explanation
Basophils are a type of leukocyte that releases histamine to promote inflammation and heparin as an anticoagulant. Histamine helps to dilate blood vessels and increase blood flow to the area, which promotes inflammation. Heparin prevents blood from clotting by inhibiting the formation of blood clots. These actions help to defend the body against pathogens and promote healing. Eosinophils, neutrophils, and lymphocytes have different functions and do not release histamine or heparin.
14.
which of the following leukocytes become marcophages and phagocytize dead and dying tissue, microorganisms, and any other foreign matter or debris?
Correct Answer
B. Monocytes
Explanation
Monocytes are a type of leukocyte that can differentiate into macrophages. Macrophages are responsible for phagocytizing dead and dying tissue, microorganisms, and other foreign matter or debris in the body. This process helps to remove and eliminate these substances, contributing to the immune response and overall health of the individual.
15.
Which of the following Leukocytes attacks parasitic worms?
Correct Answer
A. EosinopHils
Explanation
Eosinophils are a type of white blood cell that is known for their ability to attack parasitic worms. They release toxic substances that are effective in killing and destroying these parasites. Eosinophils are also involved in allergic reactions and play a role in modulating the immune response. Monocytes, basophils, and lymphocytes have different functions in the immune system but do not specifically target parasitic worms.
16.
Which of the following leukocytes is the most abundant in circulating blood?
Correct Answer
A. NeutropHils
Explanation
Neutrophils are the most abundant leukocytes in circulating blood. They make up approximately 60-70% of the total leukocyte count. Neutrophils are a type of granulocyte and are essential for the body's immune response to bacterial infections. They are highly phagocytic, meaning they engulf and destroy bacteria and other foreign particles. Neutrophils are also involved in the inflammatory response and play a crucial role in the initial defense against pathogens.
17.
What is the function of thrombocytes?
Correct Answer
C. To form platelet plugs and release clotting factors
Explanation
Thrombocytes, also known as platelets, play a crucial role in the process of blood clotting. They form platelet plugs to seal off damaged blood vessels and prevent excessive bleeding. Additionally, thrombocytes release clotting factors, such as fibrinogen, which help to form a stable blood clot. Therefore, the correct answer is "To form platelet plugs and release clotting factors."
18.
All of the following cells in the blood have DNA except which one?
Correct Answer
C. Erythrocytes
Explanation
Erythrocytes, also known as red blood cells, do not have a nucleus and therefore do not contain DNA. They are specialized cells that transport oxygen to different parts of the body. Without a nucleus, erythrocytes have more space to carry oxygen molecules. This lack of DNA also means that erythrocytes cannot divide or repair themselves, and they have a limited lifespan of about 120 days.
19.
What is hemopoiesis?
Correct Answer
B. The production of blood cells
Explanation
Hemopoiesis refers to the production of blood cells in the body. This process takes place in the bone marrow, where stem cells differentiate and develop into various types of blood cells, including red blood cells, white blood cells, and platelets. These blood cells play crucial roles in carrying oxygen, fighting infections, and promoting clotting, but hemopoiesis specifically refers to the production of these cells rather than their specific functions.
20.
Where does Leukoiesis occur?
Correct Answer
B. Red bone marrow
Explanation
Leukoiesis, also known as leukopoiesis, is the process of production of white blood cells (leukocytes) in the body. Red bone marrow is the primary site of leukoiesis, where stem cells differentiate and mature into various types of white blood cells. Yellow bone marrow, blood vessels, and the spleen do not play a significant role in leukoiesis.
21.
What factor causes the production of red blood cells?
Correct Answer
C. Erythropoietin
Explanation
Erythropoietin is a hormone produced by the kidneys that stimulates the production of red blood cells in the bone marrow. When the body detects low levels of oxygen in the blood, it releases erythropoietin to increase the production of red blood cells. This hormone promotes the differentiation and maturation of red blood cell precursors, leading to an increased production of mature red blood cells. Therefore, erythropoietin is the factor that causes the production of red blood cells.
22.
What produces colony stimulating factors?
Correct Answer
A. Kidney
Explanation
The kidney produces colony stimulating factors. These factors are proteins that stimulate the production and maturation of blood cells in the bone marrow. They play a crucial role in regulating the growth and development of different types of blood cells, including white blood cells, red blood cells, and platelets.
23.
Which statement about hemoglobin is true?
Correct Answer
C. Each globin chain on a hemoglobin molecule contains a heme group
Explanation
The correct answer is that each globin chain on a hemoglobin molecule contains a heme group. Hemoglobin is a protein found in red blood cells that is responsible for carrying oxygen throughout the body. It consists of four globin chains, each of which contains a heme group. The heme group is a non-protein component that contains an iron ion, which is able to bind to oxygen molecules. Therefore, each hemoglobin molecule can carry up to four oxygen molecules, one for each globin chain.
24.
Hemoglobin transports all of the following except which one?
Correct Answer
D. Hydroxyl ions
Explanation
Hemoglobin is a protein found in red blood cells that is responsible for carrying oxygen from the lungs to the body's tissues. It also helps transport carbon dioxide, which is a waste product, from the tissues back to the lungs to be exhaled. Additionally, hemoglobin can bind to hydrogen ions, which are involved in regulating the pH balance in the body. However, hemoglobin does not transport hydroxyl ions, which are negatively charged molecules made up of one oxygen atom and one hydrogen atom.
25.
Which one do you like?
Correct Answer
A. Option 1