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Study Stack Set 2
Physiology Weeks 7-13
| Question | Answer |
|---|---|
| Which is true of a neuron with a resting potential? | The sodium pump has moved Na+ to the outside of the plasma membrane. |
| The fastest nerve fibers in the body can conduct an impulse that is how much faster than the slowest fibers in the body? | Almost 300 times faster |
| Which of the following is true of spatial summation? | Neurotransmitters released simultaneously from several presynaptic knobs converge on one postsynaptic neuron. |
| The part of the brain that can directly influence or inhibit the release of hormones from the pituitary is the: | hypothalamus. |
| Which of the following is not a function of the hypothalamus? | Regulation of motor activity |
| Once inside the sympathetic chain ganglion, the preganglionic fiber may: | Synapse with a sympathetic postganglionic neuron. send ascending and/or descending branches through the sympathetic trunk to synapse with postganglionic neurons in other chain ganglia. pass through one or more ganglia without synapsing. |
| If the dorsal root ganglia of the spinal nerve were destroyed, a person would lose _____ related to that pathway. | sensory perception |
| Sympathetic responses generally have widespread effects on the body because: | preganglionic fibers synapse with several postsynaptic fibers. |
| Movement of hair cells in the organ of Corti against the _____ membrane can stimulate nerve impulse condition. | tectorial |
| The last step in the nonsteroid hormone mechanism of action is: | protein kinases activate other enzymes. |
| Which of the following is true about pain receptors? | Alpha fibers are associated with sharp, localized pain. |
| _____, a natural constituent of blood, acts as an antithrombin and prevents clots from forming in vessels. | Heparin |
| The functions of the lymph nodes are | defense and hematopoiesis. |
| Recognition of antigens by antibodies occurs when an | antigen’s epitopes fit into and bind to an antigen molecule’s antigen-binding site. |
| The PCO2 in the atmosphere is: | less than in the alveolar air. |
| Excessive fluid in the pleural cavity would be most likely to cause: | decreased vital capacity. |
| The hormone that inhibits gastric muscle, slowing passage of food into the duodenum, is called: | gastric inhibitory peptide. |
| Which blood vessel carries absorbed food from the GI tract to the liver? | Portal vein |
| The substances absorbed into the lymph capillaries are: | glycerol and fatty acids. |
Created by:
Crystal C
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