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Midterm 2 MC
Physiology 2420
| Question | Answer |
|---|---|
| Where do lower motor neurons originate? | ventral horn of the spinal cord |
| Which of the following cortical regions is NOT involved in the development of a motor program? | limbic system |
| What neural pathway provides for the control of fine, discrete movements of the extremities | pyramidal tract |
| What type of glial cell is a phagocyte? | microglia |
| Cranial Nerve I | olfactory |
| Cranial Nerve II | Optic |
| Cranial Nerve III | Oculomotor |
| Cranial Nerve IV | Trochlear |
| Cranial Nerve V | Trigeminal |
| Cranial Nerve VI | Abducens |
| Cranial Nerve VII | Facial |
| Cranial Nerve VIII | Vestibulocochlear |
| Cranial Nerve IX | Glossopharyngeal |
| Cranial Nerve X | Vagus |
| Cranial Nerve XI | Accessory |
| Cranial Nerve XII | Hypoglossal |
| What is a condition where light, originating from a close up source, is focused behind the retina? | hyperopia |
| When we enter a dark room, the retinal and opsin molecules within the _________ must first ____________ before low light levels can be detected. | rods; associate |
| Which of the following is the correct order of communication of visual information in the retina? | photoreceptor; bipolar cell, ganglion cell |
| The ____________, projecting from the end of hair cells, are attached to the ___________, which causes them to bend when sound waves enter the cochlea. | stereocilia; tectorial membrane |
| Which of the following physiological responses are associated with elevated sympathetic nervous system activity? | increased contractile force of the heart |
| Describe collateral ganglia | Collateral ganglia are in the sympathetic nervous system but distinct from the sympathetic chain, and they function as a site of communication between sympathetic preganglionic neurons and postganglionic neurons? |
| Which of the following neurons of the efferent branch of the peripheral nervous system does NOT release acetylcholine? | sympathetic postganglionic neuron |
| What cholinergic receptors are coupled to G proteins? | muscarinic |
| What are swellings of postganglionic autonomic axons from which neurotransmitters are released called? | varicosities |
| The contractile portion of the thin filament is composed of what protein? | actin |
| During skeletal muscle contraction as the muscle shortens, the thick and thin filaments ____________. | slide past one another |
| Which of the following is NOT a specialization observed as the neuromuscular junction? | each muscle fiber is innervated by multiple motor neurons |
| The binding of calcium to troponin will directly cause which of the following? | the movement of tropomyosinm thereby exposing the myosin-binding site on the actin molecule |
| Describe the function of the transverse (t) tubules and the SR in skeletal muscle contraction | action potentials in T Tubules are detected by DHP receptorsm which are coupled to ryanodine receptors in the SR and open channels for calcium |
Created by:
GracieLou
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