Aldosterone
a. stimulates Na+ secretion in the collecting duct
b. is secreted by the juxtaglomerular apparatus
c. stimulates K+ secretion in the distal tubule
d. has all of the above characteristics
e. has characteristics a and b
C
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A GFR measurement will be directly related to the concentration of inulin in the plasma and inversely related to the concentration of inulin in the urine
Indicate whether this statement is true or false.
The long refractory period observed in cardiac muscle
A. prolongs depolarization of the cardiac muscle. B. prevents tetanic contractions of the cardiac muscle. C. ensures that the heart has adequate time to contract. D. prevents the heart rate from slowing down. E. prevents an increase in heart rate.
Which of the following does not arise from the embryonic mesoderm?
A. The nervous system B. The blood vessels C. The mesothelium D. The skeletal system E. The dermis
Which is the larger of the sex chromosomes and is more commonly involved in sex-linked inheritance?
A. The X chromosome B. The Y chromosome