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Midterm 2 MC

Physiology 2420

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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