Describe the Frank-Starling law
What will be an ideal response?
According to the Frank-Starling law, the more the ventricular muscle cells are stretched, the more forcefully they contract. The relationship between contraction and stroke volume ensures that the volume of blood discharged from the heart is equal to the volume that enters it.
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Which of the following is an incorrect pairing of a body system and an endocrine contribution to that system?
a) Thyroid hormones promote normal development and growth of the skeleton. b) Erythropoietin regulates the amount of oxygen carried in blood by adjusting the number of red blood cells. c) Leptin enhances appetite. d) Glucocorticoids depress inflammation and immune responses. e) Epinephrine depresses the activity of the digestive system.
Urine retention is a greater problem for elderly men than for elderly women because men
A. have fewer glomeruli. B. can develop benign prostatic hyperplasia. C. have narrower ureters. D. have larger bladders. E. have weaker urinary sphincters.
If the sequence of DNA nucleotides being read is TTACTG, then transcription results in the formation of the sequence
A. TTUGUC. B. TTACTG. C. GTCATT. D. AAAGGG. E. AAUGAC.
Glucagon secretion is stimulated by:
A. hypoglycemia and parasympathetic nerve firing. B. hyperglycemia and a high concentration of epinephrine. C. high plasma epinephrine and high plasma incretin concentrations. D. hypoglycemia and high plasma epinephrine concentration. E. hyperglycemia and high plasma incretin concentration.