In the first step of spermatogenesis, spermatogonia differentiate into cells called:
a. spermatids
b. primary spermatocytes
c. secondary spermatocytes
d. spermatozoa
e. spermatophytes
Answer: b. primary spermatocytes
Anatomy & Physiology
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Fill in the blank(s) with correct word
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If a child has a vitamin D deficiency, what condition is likely to result?
A. Achondroplastic dwarfism B. Osteogenesis imperfecta C. Osteitis deformans D. Rickets E. Osteoporosis
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Human life span is ___ years
A) 80 B) 120 C) 90 D) 100
Anatomy & Physiology
Under normal circumstances, the parasympathetic system would be stronger than the sympathetic system.?
Indicate whether the statement is true or false
Anatomy & Physiology