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As discussed in the lecture, approximately how many cell types are there in human cells, at least for our comparative purposes this semester?

1) 100
2) 1000
3) 10000
4) 100000

Answer :

The human body contains at least 200 different cell types, all specialized for various roles despite having identical genetic material. This diversity results from different gene expression, which dictates cell structure and function.

There are at least 200 distinct cell types in the human body. These various cell types, despite having the same genetic makeup, differ greatly in shape, function, and the way they express their genes, leading to their specialization. For example, blood cells, skin cells, and bone cells, each have subtypes with unique structures and roles. White blood cells (WBCs) are one such type that includes subtypes like neutrophils, lymphocytes, and monocytes, each playing a crucial role in the body's immune response. Neutrophils are adept at phagocytizing bacteria and other invaders, lymphocytes are key to the adaptive immune response, and monocytes can differentiate into macrophages that digest debris in tissues.

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