The insulin receptor belongs to which family of receptors?
A. tyrosine kinase receptor
B. steroid receptor
C. cytokine receptor
D. G protein–coupled receptor
E. LDL receptor
ANS: A
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True or False? Positive feedback mechanisms are more commonly seen in ________ individuals.
A. unhealthy B. healthy
Explain why the propagation of action potentials occurs in one direction.
What will be an ideal response?
Mean arterial pressure is
A. cardiac output times peripheral resistance. B. heart rate times stroke volume. C. maximum cardiac output minus cardiac output when at rest. D. stroke volume times peripheral resistance. E. end-diastolic volume minus end-systolic volume.
Which of the following statements about blood is false?
A) Blood contains buffers that control pH. B) The normal pH of blood is 6.8 to 7.0. C) Blood is more viscous than water. D) Blood is about 55 percent plasma. E) Cells in blood comprise the formed elements.