Which cells in the testis synthesize testosterone?

a. Leydig cells
b. Myoid cells
c. Sertoli cells
d. Spermatocytes
e. Spermatogonia


ANS: A
Leydig cells, located in the interstitium between seminiferous tubules, synthesize testosterone.

Anatomy & Physiology

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Which of these statements concerning the ability of certain cells to divide and produce new cells is correct?

A) Permanent cells cannot undergo mitosis and divide. B) Labile cells do not actively replicate, but retain the ability to divide after an injury. C) Stable cells continue to divide throughout life. D) Neurons and skeletal muscle cells are considered to be stable cells. E) Permanent cells are routinely replaced by regeneration.

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Thyroid hormone has a calorigenic effect

Indicate whether the statement is true or false

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Which of the below tissues maintains open airways in the lower respiratory system?

a) stratified squamous epithelium with keratin b) ciliated pseudostratified columnar epithelium with goblet cells c) hyaline cartilage d) mucus membrane e) bone

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An immunoliposome is a liposome that

A) can recognize cancer cells. B) stimulates the immune system. C) suppresses the immune system. D) None of the answers are correct.

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