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Darrian Burbank
Physiology weeks 7-13
| What is an action potential | a rapid, temporary change in the electrical potential across a neuron or muscle cell membrane that allows for the transmission of nerve impulses |
| Which membrane receptor acts to directly change ion permeability when stimulated? | Ionotropic receptor |
| T or F: In a myelinated neuron, the impulse can travel under the myelin between nodes of Ranvier. | True |
| The vagus is said to act as a “brake” on the heart. This situation is called: | Vagal inhibition. |
| What functions as an emergency mechanism when hypoxia or hypercapnia endangers the stability of the internal environment? | Chemoreceptor reflex |
| Recognition of antigens by antibodies occurs when: | Antigen’s epitopes fit into and bind to an antigen molecule’s antigen-binding site. |
| Fluid that is clear, watery and contains protein molecules, salts, and other substances is called? | Intercellular fluid |
| The hormone that inhibits gastric muscle, slowing passage of food into the duodenum, is called: | gastric inhibitory peptide. |
| The hormone thought to be a messenger causing release of digestive enzymes from the intestinal mucosa is: | vasoactive intestinal peptide. |
| Peristalsis is regulated in part by the intrinsic stretch reflexes. It is also thought to be stimulated by the hormone: | cholecystokinin (CCK) |
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darrian_allen
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