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Linda Saechao
Physiology week 7 - 13
| Question | Answer |
|---|---|
| Which membrane receptor acts to directly change ion permeability when stimulated? | Gated-channel receptor |
| T/F Whether an impulse is continued through the neuron depends on the magnitude of the voltage in the axon hillock. | True |
| T/F The sodium-potassium pump actively pumps three potassium ions out of the neuron and two sodium ions into the neuron. | False |
| 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. |
| Sympathetic responses generally have widespread effects on the body because: | preganglionic fibers synapse with several postsynaptic fibers. |
| In a healthy adult, a well-placed tap on the knee will result in a: | stretch of the tendon, the quadriceps femoris, and thereby stimulation of the muscle spindles. |
| 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. |
| T/F Blood vessels in both digestive organs and skeletal muscles are dilated by sympathetic stimulation. | False |
| All of the following cranial nerves are involved in proprioception except the: | vagus |
| One of the few hormones that functions on a positive-feedback loop is: | oxytocin |
| The olfactory tract carries impulses associated with: | smell |
| In comparison with the nervous system, the regulatory effects of the endocrine system are: | slow to appear but long-lasting. |
| The last step in the nonsteroid hormone mechanism of action is: | protein kinases activate other enzymes. |
| Which are the two baroreceptors that are located near the heart? | aortic baroreceptors and carotid baroreceptors |
| _____, a natural constituent of blood, acts as an antithrombin and prevents clots from forming in vessels. | Heparin |
| The heart begins beating in the fetus at about what stage of development? | after about 4 weeks |
| The lymphatic system serves various functions in the body. The two most important functions of this system are | fluid balance and immunity. |
| The function of which antibody is basically unknown? | IgD |
| T/F Raising the ribs decreases the depth and width of the thorax. | False |
| Which of the following constitutes total lung volume? | Residual volume and vital capacity |
| External respiration can be defined as: | the exchange of gases between the lung and the blood capillaries in the lung. pulmonary ventilation. |
| Fats and other nutrients in the duodenum stimulate the intestinal mucosa to release a hormone called | gastric inhibitory peptide. |
| The final step in lipid transport by the intestines is the formation of | chylomicrons. |
Created by:
Lindas5987
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