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Physio week 14
weeks 7-13
| Question | Answer |
|---|---|
| When neurotransmitters from synaptic knobs stimulate a postsynaptic neuron in rapid succession, their effect can add up over a brief period to produce an action potential. This is called | temporal summation. |
| There are two types of synapses—the electrical synapse and the __________ synapse. | chemical |
| No impulse can be sent through a neuron | during the absolute refractory period |
| 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 |
| If the center of a reflex arc is the brain, the response it mediates is called a | cranial reflex. |
| Both sympathetic and parasympathetic divisions are tonically active, which means they | continually conduct impulses to autonomic effectors. |
| The _____ is an extension of the great toe, with or without fanning of the other toes, in response to stimulation of the outer margin of the sole of the foot. | Babinski sign |
| Somatic motor and autonomic pathways share all of the following characteristics except: | number of neurons between central nervous system (CNS) and effector. |
| The knee jerk can be classified as a segmental reflex because: | impulses that mediate it enter and leave the same segment of the cord. |
| The preganglionic neurons of both the sympathetic and the parasympathetic divisions are cholinergic. | true |
| What goes wrong in the function of insulin in type 2 diabetes? | the cells don't respond to insulin like they should |
| small molecule binds to a G protein, preventing its activation. What direct effect will this have on signaling that involves cAMP? | Adenylyl cyclase will not be activated. |
| Which of the following is true about pain receptors? | Alpha fibers are associated with sharp, localized pain |
| Which of the following is a function of glucagon? | Tends to increase blood glucose concentrations |
| The last step in the nonsteroid hormone mechanism of action is: | protein kinases activate other enzymes. |
| During pregnancy, what happens to the oxygenated blood returned from the placenta via the umbilical vein? | It flows into the inferior vena cava. |
| _____ shock results from a condition in which infectious agents release toxins into the blood. | septic |
| Blood pressure is measured with the aid of an apparatus known as a(n) | sphygmomanometer |
| The function of which antibody is basically unknown? | IgD |
| During inspiration, the expansion of the lungs causes: | a decrease in alveolar pressure. |
| The process of fat emulsification consists of: | breaking fats into small droplets. |
| The intestinal hormone cholecystokinin: | causes the pancreas to increase exocrine secretions high in enzyme content. opposes the influence of gastrin on gastric parietal cells., stimulates the contraction of the gallbladder. |
Created by:
jency.mangisel