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physiology week 7-14
| Question | Answer |
|---|---|
| a synapse consists of | synaptic knob, a synaptic cleft, and the plasma membrane of a postsynaptic neuron |
| in a myelinated neuron, the impulse can travel under the myelin between nodes of Ranvier. | True |
| which membrane receptor acts to directly change ion permeability when stimulated? | Gated-channel receptor |
| both sympathetic and parasympathetic divisions are tonically active, which means they | continually conduct impulses to autonomic effectors. |
| the somatic motor system includes all the ----motor pathways---- the CNS. | voluntary; outside |
| Acetylcholine binds to ----receptors | Cholinergic |
| Based on the animation, where do frequencies-from high to low pitches- cause activity in ihe hair cells within the cochlear duct? | the apex of the cochlea; between the base and the apex of the cochlea |
| which is not true of the hormone somatostatin? | it stimulates the secretion of insulin. |
| from which vessels do myocardial cells receive blood? | coronary arteries |
| during pregnancy, what happens to the oxygenated blood returned from the placenta via the umbilical vein? | it flows into the inferior vena cava. |
| the vagus is said to act as a "brake" on the heart. This situation is called | vagal inhibition. |
| which of the following constitutes total lung volume? | residual volume and vital capacity |
| the vital capacity is equal to the sum of the: | inspiratory reserve volume, tidal volume, and expiratory reserve volume. |
| ciliated cells lining the respiratory tract: | help move the mucus blanket toward the pharynx. |
| Dalton law states the partial pressure of a gas in a mixture of gases is -----to the total pressure of the mixture. | directly related to the concentration of that gas in the mixture and |
| the hormone that inhibits gastric muscle, slowing passage of food into the duodenum, is called: | gastric inhibitory peptide. |
| glucose moves from the GI tract into the circulatory system by the process of | cotransport |
| the hormone thought to be a messenger causing release of digestive enzymes from the intestinal mucosa is | vasoactive intestinal peptide. |