When stimulated by a particular hormone, there is a marked increase in the activity of G proteins in the membrane. The hormone is probably
A) aldosterone.
B) estrogen.
C) a steroid.
D) a peptide.
E) testosterone.
C) a steroid.
You might also like to view...
What causes much of the blood in the fetal right atrium to be shunted to the left atrium through the foramen ovale?
A. The blood pressure in the right atrium is greater than in the left atrium. B. There is a valve that directs the blood that way. C. The fetus is in an antigravity situation provided by the amnionic fluid. D. The blood pressure in the left atrium is greater than in the right atrium. E. The umbilical arteries have valves.
If someone runs a marathon through a desert while eating pretzels and not drinking water, their plasma osmolarity
A. rises and becomes hypertonic to the interstitial and intracellular fluid compartments. B. rises and becomes hypotonic to the interstitial and intracellular fluid compartments. C. decreases and becomes hypertonic to the interstitial and intracellular fluid compartments. D. decreases and becomes hypotonic to the interstitial and intracellular fluid compartments.
Long-term inhibition of thirst is mostly associated with which of the following?
A. Cooling of the mouth B. Increased salivation C. A drop in blood osmolarity D. Moistening of the mouth E. Distension of the stomach by ingested water
Which of the following combining forms refers to the prostate?
A. vas/o B. prosta/o C. prostat/o D. pen/o