The patellar "knee jerk" reflex is an example of a(n) ________.
A) extensor thrust reflex
B) stress reflex
C) crossed-extensor reflex
D) stretch reflex
D) stretch reflex
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The inherent pacemaker discharge rate of the sinoatrial node is 72 beats per minute.
Answer the following statement true (T) or false (F)
Primary active transport is accomplished by:
A. Electrical forces within the plasma membrane B. Exocytosis C. Endocytosis D. Changes in shape and position of transport proteins in the plasma membrane, requires, energy (ATP) to pump against concentration gradient
Which of the following statements is correct?
a. Parietal (oxyntic) cells secrete HCl b. Parietal (oxyntic) cells secrete gastric intrinsic factor (GIF) c. G cells secrete gastric intrinsic factor (GIF) d. Parietal (oxyntic) cells secrete gastrin
Blood pressure is determined by
A) measuring the size of the pulse. B) listening carefully to the pulse. C) estimating the pressure needed to close off an artery with an external pressure cuff. D) estimating the degree of turbulence in a partly closed vessel. E) measuring the force of contraction of the left ventricle.