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BIOL 203 Practice Exam Correct Questions & Answers(GRADED A)!!
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Proteogylcans - ANSWER attract water and give flexibility to cartilage Trabeculae are found in... - ANSWER spongy bone and are able to bear weight Endochondral development of bone, what occurs second? - ANSWER A bone collar forms around the edge of the cartilage The part where the epiphyse...

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  • April 26, 2024
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  • 2023/2024
  • Exam (elaborations)
  • Questions & answers

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  • endochondral development of bone what occurs seco
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Bio 203 Final Exam Review| 115
Questions| Correct Answers(RATED A+)

Nerves are __________ of the nervous system.

A. organs
B. tissues
C. organ systems
D. organelles
E. cells - ANSWER a. organs

The term "nerve fiber" refers to a(n) __________.

A. nerve cell
B. organelle in nerve cells
C. organ
D. axon
E. bundle of macromolecules in nerve cells - ANSWER d. axon

What is the primary site on a neuron for receiving signals from other neurons?

a. the axon terminals
b. the axons
c. the axon collaterals
d. the neurosomas
e. the dendrites - ANSWER e. the dendrites

In order to regenerate, a peripheral nerve fiber must have which of the following?

a. all dendrites intact
b. at least half of the length of the fiber intact
c. at least the entire axon and neurilemma intact
d. the neurosoma and at least some of neurilemma intact
e. at least part of the neurosoma intact - ANSWER d. the neurosoma and at least some
of the neurilemma intact

Which of the following will cause the plasma membrane to hyperpolarize when at its
RMP?

a. an inflow of sodium
b. an inflow of potassium
c. an inflow of calcium

,d. an inflow of chloride
e. an outflow of chloride - ANSWER d. an inflow of chloride

A neuron receives a stimulus. Which of the following events happens next?

a. a local potential develops
b. threshold is reached
c. hyperpolarization of the membrane
d. repolarization of the membrane
e. a resting membrane potential is established - ANSWER a. a local potential develops

When the voltage of a plasma membrane shifts from +35 mV toward 0 mV, the cell is
__________.

a. depolarization
b. repolarization
c. hyperpolarization
d. reaching the threshold
e. exiting the threshold - ANSWER b. repolarization

All of the following are typical characteristics of neurotransmitters except __________.

a. they are synthesized by a presynaptic neuron
b. they are released in response to stimulation
c. they are released into the bloodstream before reaching the postsynaptic cell
d. they bind to specific receptors on the postsynaptic cell
e. they alter the physiology of the postsynaptic cell - ANSWER c. they are released into
the bloodstream before reaching the postsynaptic cell

Inhibitory postsynaptic potentials (IPSPs) are associated with which of the following?

a. depolarization of the cell membrane
b. repolarization of the cell membrane
c. hyperpolarization of the cell membrane
d. no change in the cell membrane potential
e. no change of the threshold - ANSWER c. hyperpolarization of the cell membrane

Which of these is an example of an EPSP in a typical neuron?

a. a voltage change from 0 mV to +0.35 mV
b. a voltage change from -70 mV to -69.5 mV
c. a voltage change from -69.5 mV to -70 mV
d. a voltage change from +35 mV to 0 mV
e. a voltage change from -70 mV to -70.5 mV - ANSWER b. a voltage change from -70
mV to -69.5 mV

, What is the opposite of presynaptic inhibition?

a. coding
b. integration
c. recruitment
d. summation
e. facilitation - ANSWER e. facilitation

If a neuron is prevented from sending a neurotransmitter across a synapse to another
cell, which neuron property is being inhibited?

a. secretion
b. excitability
c. conductivity
d. permeability
e. viability - ANSWER a. secretion

In PNS nerve fiber regeneration, how is a growing axon directed to its original
destination?

a. it grows within the regeneration tube
b. The axonal terminals grow toward the neurosoma until the two severed fragments are
reunited.
c. The axon grows a collateral that is directed by growth factors secreted by the
postsynaptic neuron.
d. Injured Schwann cells produce a trail of prostaglandins to the original destination.
e. neurons cannot regenerate - ANSWER a. it grows within the regeneration tube

What type of glial cell is shown here?

a. schwann cell
b. oligodendrocyte
c. astrocyte
d. satellite cell
e. ependymal cell - ANSWER a. schwann cell

What type of cell is labeled 1 in this figure?

a. astrocyte
b. microglia
c. neuron
d. oligodendrocyte
e. schwann cell - ANSWER a. astrocyte

What type of cell is labeled 2 in this figure?

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