FREE AND STUDY GAMES ABOUT 131 CNS TISSUE EXAM

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FREE AND STUDY GAMES ABOUT 131 CNS TISSUE EXAM

QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -120 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: neuroglial cells of CNS (can/cannot) divide mitotically throughout life

Answer:

can

Question 2: sensory input & motor output (location)

Answer:

somatic body region, visceral body region (viscera within ventral body cavity, inner tube)

Question 3: nervous system (summarized function)

Answer:

interprets sensory input and decides what to do (integration), and dictates a response (motor output) Question 4: elongated cell bodies with cell processes that have many pointed projections

Answer:

microglia

Question 5: interneurons (appearance)

Answer:

diverse size and branching. can be single neuron connecting sensory and motor neuron, or link into chains Question 6: __ does not originate from nervous tissue, and possibly plays role in maturation of synaptic clefts

Answer:

microglia

Question 7: what makes up half the mass of the brain?

Answer:

neuroglial cells of CNS

Question 8: oligodendrocytes produce insulating coverings called ___

Answer:

myelin sheaths

Question 9: which branches more, axons or dendrites?

Answer:

dendrites

Question 10: how are oligodendrocites different from schwann cells?

Answer:

oligodendrocites have multiple processes that myelinate several axons; also have nodes of Ranvier

Question 11: motor neurons (structural classification?)

Answer:

multipolar.Question 12: ___ lines up in small groups and wraps their cell processes around thicker axons in CNS

Answer:

oligodendrocytes

Question 13: chromatophilic bodies (Nissl bodies)

Answer:

in cytoplasm of cell body of neutron. clusters of rough ER and free ribosomes

Question 14: axon (look)

Answer:

• per neuron, arising from cone-shaped region called axon hillock. uniform diameter.

Question 15: terminal branches

Answer:

branching happens usually at terminus of axon, called __ Question 16: ___ is derived from blood cells called ___ which migrate to CNS during fetal stage

Answer:

microglia; monocytes

Question 17: neurilemma (what is it, where)

Answer:

outer layer of myelin sheath: nucleus & cytoplasm of schwann cell

Question 18: __ are segmented structures made of lipoprotein

Answer:

myelin sheaths

Question 19: multipolar neuron (types, how abundant)

Answer:

most are interneurons (conduct impulses within CNS), some motor neurons. 99% of neurons in body

Question 20: CNS is made up of (2)

Answer:

brain, spinal cord

Question 21: nerve impulse path (w/in 1 neuron)

Answer:

generated where axon emerges from axon hillock; down axon; neurotransmitters poop out at synaptic cleft

Question 22: 3 characteristics of neurons

Answer:

extreme longevity, most can't mitotic division, high metabolic rate

Question 23: ___ propagates calcium signals involved in memory

Answer:

astrocyte

Question 24: neuron vs nerve fiber vs nerve

Answer:

nerve cell; axon; collection of parallel nerve fibers of PNS

Question 25: longest axon?

Answer:

from lumbar spine to foot, can be 3-4 ft. (axon can be short though)

Question 26: non-conducting, wrap around, nourish, insulate, protect neurons

Answer:

neuroglial cells

Question 27: describe synapse between 2 neurons

Answer:

axon terminal of pre-synaptic neuron, presynaptic membrane, synaptic cleft, post-synaptic membrane, postsynaptic dendrite

Question 28: what does presynaptic neuron do?

Answer:

conducts signal towards synapse