INTRODUCTION TO MICROSCOPY CELL BIOLOGY
DIFFERENTIATED CELL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The human immune system contain different cells with many different roles. For example special white blood cells called macrophages move through the body ingesting particles, such as microbes, that they identify as foreign. The body responds to a specific invader, such as the human immunodeficiency virus (HIV), by increasing the number of T cells and B cells. Some of the B cells give rise to plasma cells that develop the cell machinery to secrete antibodies. B cells can also become memory cells that can respond to a future infection. As the infection progresses, HIV selectively destroys helper T cells. Which one of the following best illustrates cell differentiation?
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HIV selectively destroys helper T cells.
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B cells giving rise to plasma cells and memory cells.
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An increase in the number of T cells and B cells occurs in response to HIV invasion.
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Macrophages ingest foreign particles, not body cells.
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Explanation:
Detailed explanation-1: -White blood cells are the key players in your immune system. They are made in your bone marrow and are part of the lymphatic system. White blood cells move through blood and tissue throughout your body, looking for foreign invaders (microbes) such as bacteria, viruses, parasites and fungi.
Detailed explanation-2: -Humans have three types of immunity-innate, adaptive, and passive: Innate immunity: Everyone is born with innate (or natural) immunity, a type of general protection. For example, the skin acts as a barrier to block germs from entering the body.
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