Which type of vessel consists of a single layer of endothelium?
A) None of the listed responses is correct.
B) arteries
C) veins
D) capillaries
D
Explanation:
A) One of the listed responses is correct.
B) Arteries are made up of more than one layer of cells.
C) Veins are made up of more than one layer of cells.
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During dark adaptation ________
A) the cones are activated B) rhodopsin accumulates in the rods C) the sensitivity of the retina decreases D) the rate of rhodopsin breakdown is accelerated
Prostaglandins play a role in ________
A) noninflammatory responses B) control of blood volume C) skeletal muscle contraction D) control of blood pressure
The single duct that drains urine from the bladder out of the body is the ________
A) None of the listed responses is correct. B) ureter C) renal pelvis D) urethra