1.
White blood cells are also called _________ .
Correct Answer
C. Leucocytes
Explanation
White blood cells are also called leucocytes. Leucocytes are a vital component of the immune system and play a crucial role in defending the body against infections and diseases. They are responsible for identifying and destroying harmful pathogens, such as bacteria and viruses. Leucocytes are produced in the bone marrow and are found in the bloodstream and various tissues throughout the body. Their main function is to recognize and eliminate foreign substances, toxins, and abnormal cells to maintain overall health and well-being.
2.
What kind of leucocyte is this?
Correct Answer
A. Neutrophil
Explanation
A neutrophil is a type of white blood cell that is part of the body's immune system. It is responsible for fighting off bacterial and fungal infections. Neutrophils are the most abundant type of white blood cell and are characterized by their multi-lobed nucleus and granular cytoplasm. They are typically the first cells to arrive at the site of infection and work by engulfing and destroying invading pathogens.
3.
______ are the largest kind of leucocyte.
Correct Answer
C. Monocytes
Explanation
Monocytes are the largest kind of leucocyte. They are a type of white blood cell that plays a crucial role in the immune system. Monocytes are responsible for phagocytosis, which is the process of engulfing and destroying pathogens and foreign substances in the body. They also help in presenting antigens to other immune cells, thus initiating an immune response. Due to their large size and versatile functions, monocytes are considered the largest type of leucocyte.
4.
There are two types of lympocyte, ___ and ___ lymphocytes.
Correct Answer
b t
b and t
t b
t and b
Explanation
The correct answer is "b and t". Lymphocytes are a type of white blood cell that play a crucial role in the immune system. There are two main types of lymphocytes: B lymphocytes (B cells) and T lymphocytes (T cells). B cells are responsible for producing antibodies, while T cells are involved in cell-mediated immunity and directly attack infected or abnormal cells. Therefore, the statement "b and t" accurately describes the two types of lymphocytes.
5.
In the tissue, monocytes become _______ , engulfing ______________ and other foreign material.
Correct Answer
macrophages microorganisms
macrophages and microorganisms
Explanation
Monocytes are a type of white blood cell that play a role in the immune response. In the tissue, monocytes differentiate into macrophages, which are specialized cells capable of engulfing and destroying microorganisms and other foreign material. Therefore, the correct answer is "macrophages microorganisms, macrophages and microorganisms."
6.
B and T lymphocytes __________ .
Correct Answer
B. Look the same
Explanation
B and T lymphocytes look the same because they are both types of white blood cells that are involved in the immune response. They have similar structures and functions, such as recognizing and attacking foreign substances in the body. Despite some differences in their specific roles and mechanisms, they share many common characteristics and can be difficult to distinguish under a microscope without specialized techniques.
7.
Monocytes have a large, _____-_____ nucleus and clear cytoplasm.
Correct Answer
bean shaped
Explanation
Monocytes have a large, bean-shaped nucleus and clear cytoplasm. This means that the nucleus of a monocyte is shaped like a bean and takes up a significant portion of the cell. Additionally, the cytoplasm of a monocyte is transparent or clear, allowing for easy visualization of the nucleus.
8.
__________ engulf microorganisms by phagocytosis.
Correct Answer
A. Neutrophils
Explanation
Neutrophils are a type of white blood cell that play a crucial role in the immune response. They are known for their ability to engulf and destroy microorganisms through a process called phagocytosis. Neutrophils have specific receptors on their surface that recognize and bind to pathogens, triggering the engulfment process. Once inside the neutrophil, the microorganism is enclosed in a membrane-bound vesicle called a phagosome. The neutrophil then fuses the phagosome with lysosomes containing enzymes that degrade the microorganism, effectively eliminating the threat.
9.
_______ have small granules in the cytoplasm.
Correct Answer
neutrophils
Explanation
Neutrophils have small granules in the cytoplasm. These granules contain enzymes and proteins that help the neutrophils to fight against infections and foreign substances in the body. The granules release their contents when the neutrophils encounter pathogens, aiding in the destruction and removal of these harmful agents. This characteristic distinguishes neutrophils from other types of white blood cells and is essential for their role in the immune response.
10.
Erythrocytes carry a protein called ___________ which carries oxygen.
Correct Answer
haemoglobin
Explanation
Erythrocytes, also known as red blood cells, contain a protein called haemoglobin. Haemoglobin is responsible for carrying oxygen from the lungs to the body's tissues and organs. It binds to oxygen in the lungs and releases it in areas where oxygen is needed. This process is essential for the delivery of oxygen throughout the body and the overall functioning of the respiratory system.
11.
B lymphocytes produce _______ .
Correct Answer
antibodies
Explanation
B lymphocytes, also known as B cells, are a type of white blood cell that plays a crucial role in the immune response. These cells are responsible for producing antibodies, which are proteins that help to identify and neutralize foreign substances such as bacteria or viruses. Antibodies bind to specific antigens on these foreign substances, marking them for destruction by other immune cells. Therefore, the correct answer is antibodies.
12.
What is the name of the leucocyte that is labelled?
Correct Answer
B. Lymphocyte
Explanation
The leucocyte that is labelled in the question is a lymphocyte.
13.
_________ have a large, darkly-stained nucleus surrounded by a thin layer of clear cytoplasm.
Correct Answer
B. Lymphocytes
Explanation
Lymphocytes have a large, darkly-stained nucleus surrounded by a thin layer of clear cytoplasm. This characteristic morphology is important for identifying lymphocytes under a microscope. Neutrophils and monocytes, on the other hand, have different nuclear and cytoplasmic features.
14.
A erythrocytes shape is a ______ disc.
Correct Answer
biconcave
Explanation
Erythrocytes, also known as red blood cells, have a unique shape that can be described as a biconcave disc. This means that they are flat and round with a concave shape on both sides. The biconcave shape allows for a larger surface area, which is important for their main function of carrying oxygen throughout the body. This shape also allows the red blood cells to be flexible and easily squeeze through narrow blood vessels. Overall, the biconcave shape of erythrocytes is essential for their efficient functioning in the circulatory system.
15.
T lymphocytes have several functions, including ____ _________ .
Correct Answer
cell destruction
Explanation
T lymphocytes, also known as T cells, play a crucial role in the immune system. One of their main functions is cell destruction. T cells are able to identify and eliminate infected or abnormal cells in the body, such as virus-infected cells or cancer cells. They do this by releasing toxic substances or by directly attacking and killing the target cells. This process of cell destruction is essential for maintaining the body's overall health and protecting it from harmful invaders.
16.
______ spend 2-3 days in the circulatory system, then move into the tissues.
Correct Answer
C. Monocytes
Explanation
Monocytes spend 2-3 days in the circulatory system, then move into the tissues. Monocytes are a type of white blood cell that plays a crucial role in the immune response. They are produced in the bone marrow and released into the bloodstream. Once in the circulatory system, monocytes can migrate to different tissues where they differentiate into macrophages, which are responsible for engulfing and destroying pathogens. This process of monocytes moving into the tissues helps to eliminate harmful substances and protect the body from infections.
17.
Red blood cells are also called ________ .
Correct Answer
B. Erythrocytes
Explanation
Red blood cells are also called erythrocytes. Erythrocytes are the most abundant type of blood cell and their primary function is to transport oxygen from the lungs to the body's tissues and carbon dioxide from the tissues back to the lungs. They are red in color due to the presence of a protein called hemoglobin, which binds to oxygen. Erythrocytes lack a nucleus and other organelles, allowing for more space to carry oxygen.