The adrenal medulla consists of modified, post-ganglionic sympathetic neurons called chromaffin cells which store norepinephrine and epinephrine in chromaffin granules. In this situation, when these chemical transmitters are released they act as
a. neurohormones.
b. neurotransmitters.
c. stress inducers.
d. glucocorticoids.
e. mineralocorticoids.
A
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Cholecystokinin from the intestinal wall is stimulated by the presence of
A) lipids and partially digested proteins in the duodenum. B) proteins and partially digested lipids in the duodenum. C) lipids and partially digested carbohydrates in the duodenum. D) proteins and partially digested carbohydrates in the duodenum. E) carbohydrates and partially digested lipids in the duodenum.
During cerebrovascular accidents, glutamate released by damage neurons binds to ____ receptors of neighboring, healthy neurons, thus, initiating apoptosis
a. acetylcholine b. calcium c. epinephrine d. NMDA e. serotonin
To prevent excessive blood loss following tissue damage, local chemicals such as
A. bradykinins are released to trigger vasoconstriction. B. vasopressins are released to trigger vasodilation. C. nitric oxides are released to trigger vasoconstriction. D. prostaglandins are released to trigger vasodilation. E. thromboxanes are released to trigger vasoconstriction.
Neural tissue develops from the ________
A) endoderm B) mesoderm C) ectoderm D) entoderm