The male testes are responsible for producing the steroid hormones called androgens. Which organelle do these cells likely have an abundance of?
A. Rough endoplasmic reticulum
B. Smooth endoplasmic reticulum
C. Mitochondria
D. Proteasomes
Answer: B
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The toxic by-products of amino acid breakdown must be excreted. Which of the following is NOT one of the main forms of nitrogen excretion?
A) Ammonia B) Pyridine C) Urea D) Uric acid
The uterine cycle begins with
A) a surge of LH and FSH. B) proliferation of the functional layer of the endometrium. C) the onset of the menses. D) ovulation. E) None of the answers are correct
Some fish can be caught with a net by bringing it up from beneath them
Indicate whether the statement is true or false
The most important buffer system in the extracellular fluid is
A) carboxyl groups. B) chloride. C) monoprotonated phosphates. D) amino acids. E) bicarbonate.