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Amy Vang
Physiology Weeks 7-13
| Which membrane receptor acts to directly change ion permeability when stimulated? | Gated-channel receptor |
| The difference between sodium and potassium in the generation of action potential is that: | sodium causes depolarization of the cell membrane, and potassium causes repolarization of the cell membrane. |
| The speed of a nerve impulse depends on the neuron’s resting potential. | False |
| The somatic motor system includes all the _____ motor pathways _____ the CNS. | voluntary; outside |
| A _____ is a skeletal muscle or group of muscles that receives motor axons from a given spinal nerve. | myotome |
| Which hormone is released by the pituitary to stimulate the thyroid gland? | thyrotropin |
| What is the functional significance of large areas of cardiac muscle being electrically coupled to form a single functional syncytium? | Because they form a syncytium, muscle cells can pass an action potential along a large area of the heart wall, stimulating contraction in each muscle fiber of the syncytium. |
| Factors that affect the strength of myocardial contraction are called | inotropic factors. |
| Molecules formed by the reactions of the complement cascade assemble themselves on the enemy cell’s surface, which results in | cytolysis. |
| The hormone thought to be a messenger causing release of digestive enzymes from the intestinal mucosa is: | vasoactive intestinal peptide. |
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Amy Vang
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