What structure distributes tears across the surface of the eye?
A) palpebrae
B) eyelashes
C) ciliary glands
D) lacrimal caruncle
A
Explanation:
B) The eyelashes protect the eye from dust and other foreign objects.
C) Ciliary glands keep the surface of the eye clean.
D) The lacrimal caruncle contains modified sweat and sebaceous glands.
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Growth hormone does not directly affect bone growth, but instead it stimulates the release of somatomedins from the liver, which in turn promote bone growth
Indicate whether the statement is true or false
Which of the following correctly describes water movement across the epithelial cells lining the collecting duct?
A) Water can permeate the lipid bilayer at all times. B) Water can permeate the phospholipid bilayer only in the presence of aldosterone. C) Water can permeate the apical membrane through aquaporin-2 and the basolateral membrane through aquaporin-3, but aquaporin-2 is only present in the presence of ADH. D) Water can permeate the basolateral membrane through aquaporin-2 and the apical membrane through aquaporin-3, but aquaporin-2 is only present in the presence of aldosterone. E) Water can permeate the phospholipid bilayer only in the presence of ADH.
Catecholamines are a subtype of ________ neurotransmitter.
A. soluble gas B. neuropeptide C. acetylcholine D. monoamine E. amino acid
A ________ carries urine from a kidney to the urinary bladder.
A. calyx B. renal papilla C. urethra D. ureter