Which is NOT a correct step in the hormone regulation of blood pressure and reabsorption?
Select one:
a. When blood volume and pressure are low, the juxtaglomerular apparatus secretes renin.
b. When blood pressure is high, the heart atria secrete ANH.
c. High blood pressure causes the kidneys to secrete aldosterone.
d. Renin leads to production of angiotensin I and II and eventual reabsorption of sodium ions and water.
e. If you drink more water, the pituitary reduces ADH and more water and urine are excreted.
c. High blood pressure causes the kidneys to secrete aldosterone.
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Populations rarely reach their biotic potential because ________
a. species cannot breed quickly enough b. the death rate always exceeds the birth rate c. there are limiting factors on population growth d. all of the choices
Which mineral ion is required for ribozymes to become active and begin self-replication?
a. ferrous iron b. ferric iron c. zinc d. magnesium e. selenium
Amine hormones include
a. estrogens. b. growth hormone. c. melatonin. d. cortisol. e. oxytocin.
Sexual reproduction is important to the survival of a species in a changing environment because
A. sexual reproduction requires less overall energy expenditure than asexual reproduction. B. sexual reproduction produces genetically different individuals. C. sexual reproduction requires only one individual. D. sexual reproduction produces genetically-identical individuals. E. All answers are correct.