Which of the following contains the testes?
a) epididymis
b) Mesentery
b) prostate
d) scrotum
Answer: d) scrotum
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Sodium-potassium pumps are examples of what type of cellular transport?
a) primary active transport b) secondary active transport c) transport in vesicles d) facilitated diffusion e) hypertonic transport
An antigen that promotes an immune response that is greater than necessary is called a(n)
A. antibody. B. mast cell. C. allergen. D. MHC.
The human genome consists of about ________ chemical letters
A) 300,000 B) 1 million C) 3 billion D) 300 billion
How does the loop of Henle enable the mammalian kidney to produce hypertonic urine?IThe ascending limb of the loop actively extrudes Na+.IIThe descending limb interacts with the ascending limb to raise the osmolarity of the extracellular fluid in the renal medulla.IIIThe concentration is further enhanced by the presence of urea, which draws water out of the collecting ducts by osmosis.
A. Just III B. II and III C. Just I D. I, II, and III E. I and II