Which of the following structures is used to control the flow of blood through a capillary bed?
a) thoroughfare channels
b) precapillary sphincters
c) postcapillary sphincters
d) venules
e) valves in veins
b
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Match the following:
A) Thalamus B) Prefrontal area C) Hypothalamus D) Primary motor cortex 1) A major relay station for sensory information ascending to primary sensory areas of the cerebral cortex. Contains many specialized nuclei. 2) This brain area associates experiences necessary for the production of abstract ideas, judgment, and conscience. 3) The axons from this area form the major pyramidal tracts. 4) This area is the main visceral control center of the body.
The hormone aldosterone promotes the
A) secretion of calcium ions. B) reabsorption of sodium ions. C) reabsorption of potassium ions. D) secretion of sodium ions.
Enterogastrones are produced by the duodenum, and the two most important enterogastrones have an inhibitory effect on the stomach
Indicate whether the statement is true or false
A damaged atrioventricular (AV) bundle or atrioventricular (AV) node will primarily affect the length of the:
A) T wave. B) P wave. C) Q-T interval. D) P-R interval.