Question 1

Axon diameter and degree of myelination determine nerve impulse conduction velocity.

Accepted Answer

A) True 
 B)False

Question 2

During depolarization, the inside of the neuron's membrane becomes less negative.

Accepted Answer

A) True 
 B)False

Question 3

If a post synaptic neuron is stimulated to threshold by spatial summation this implies that________.

Accepted Answer

A)  the post synaptic cell is slow to repolarize 
B)  the postsynaptic cells has many synapses with many presynaptic neurons 
C)  the post synaptic cell has a lower than normal threshold 
D)  the post synaptic cell has many voltage gated ion channels

Question 4

The concentration of ions in the chemical environment surrounding the neurons must be tightly regulated for neurons to function properly. Which of the following cells is mostresponsible for this?

Accepted Answer

A)  satellite cells 
B)  astrocytes 
C)  Schwann cells 
D)  oligodendrocytes

Question 5

What is the role of microglial cells and why are they so important in the CNS?

Accepted Answer

The answer of What is the role of microglial cells...

Question 6

Which of the following will occur when an excitatory postsynaptic potential (EPSP) is being generated on the dendritic membrane?

Accepted Answer

A)  Specific sodium gates will open. 
B)  Sodium gates will open first, then close as potassium gates open. 
C)  A single type of channel will open, permitting simultaneous flow of sodium and potassium. 
D)  Specific potassium gates will open.

Question 7

Meningitis can be caused by infection of the central nervous system by bacteria. Which cells would be most responsible for removing the infection?

Accepted Answer

A)  Schwann cells 
B)  oligodendrocytes 
C)  microglia 
D)  satellite cells

Question 8

Which of the choices below describes the ANS?

Accepted Answer

A)  motor fibers that conduct nerve impulses from the CNS to skeletal muscles 
B)  sensory neurons that convey information from somatic receptors in the head, body wall, and limbs and from receptors from the special senses of vision, hearing, taste, and smell to the CNS 
C)  motor fibers that conduct nerve impulses from the CNS to smooth muscle, cardiac muscle, and glands 
D)  sensory and motor neurons that supply the digestive tract

Question 9

Reflexes are rapid, automatic responses to stimuli that will produce the same effect every time.

Accepted Answer

A) True 
 B)False

Question 10

Cranial nerve II, the optic nerve sends nerve impulses to the brain carrying information about the things we see. These nerve fibers most likely belong to which division of the nervoussystem?

Accepted Answer

A)  sensory (afferent) division 
B)  somatic nervous system 
C)  sympathetic division 
D)  parasympathetic division

Question 11

A patient is admitted to the hospital with exacerbation of multiple sclerosis (MS). She asks the nurse, "Why did this have to happen to me again? I was doing so well." Explain why some forms of MS arecharacterized by periods of remission and exacerbation.

Accepted Answer

The answer of A patient is admitted to the hospital...

Question 12

Unipolar neurons have axons structurally divided into peripheral and central processes.

Accepted Answer

A) True 
 B)False

Question 13

Select the correct statement regarding chemical synapses.

Accepted Answer

A)  The release of neurotransmitter molecules gives cells the property of being electrically coupled. 
B)  Neurotransmitter receptors are located on the axons terminals of cells. 
C)  The synaptic cleft uses the action potential to transmit a chemical signal to the post synaptic cell. 
D)  Cells with gap junctions use chemical synapses.

Question 14

The period after an initial stimulus when a neuron is not sensitive to another stimulus is the________.

Accepted Answer

A)  repolarization 
B)  depolarization 
C)  resting period 
D)  absolute refractory period

Question 15

At the biochemical level, what is the explanation of the hyperpolarization phase at the conclusion of the action potential?

Accepted Answer

The answer of At the biochemical level, what is the...

Question 16

Which of the following is false or incorrect?

Accepted Answer

A)  A nerve impulse occurs if the excitatory and inhibitory effects are equal. 
B)  An excitatory postsynaptic potential occurs if the excitatory effect is greater than the inhibitory effect but less than threshold. 
C)  An inhibitory postsynaptic potential occurs if the inhibitory effect is greater than the excitatory, causing hyperpolarization of the membrane.

Question 17

A chemical messenger that does not directly cause ESPSs or IPSPs but does affect the strength of synaptictransmission is a________.

Accepted Answer

The answer of A chemical messenger that does not directly...

Question 18

Which of the following is not characteristic of neurons?

Accepted Answer

A)  They have an exceptionally high metabolic rate. 
B)  They conduct impulses. 
C)  They have e xtreme longevity. 
D)  They are mitotic.

Question 19

Neurons in the CNS are organized into functional groups.

Accepted Answer

A) True 
 B)False

Question 20

Saltatory conduction is made possible by________.

Accepted Answer

A)  diphasic impulses 
B)  the myelin sheath 
C)  erratic transmission of nerve impulses 
D)  large nerve fibers

Exam 11: Fundamentals of the Nervous System and Nervous Tissue

Axon diameter and degree of myelination determine nerve impulse conduction velocity.

During depolarization, the inside of the neuron's membrane becomes less negative.

If a post synaptic neuron is stimulated to threshold by spatial summation this implies that________.

The concentration of ions in the chemical environment surrounding the neurons must be tightly regulated for neurons to function properly. Which of the following cells is mostresponsible for this?

What is the role of microglial cells and why are they so important in the CNS?

Which of the following will occur when an excitatory postsynaptic potential (EPSP) is being generated on the dendritic membrane?

Meningitis can be caused by infection of the central nervous system by bacteria. Which cells would be most responsible for removing the infection?

Which of the choices below describes the ANS?

Reflexes are rapid, automatic responses to stimuli that will produce the same effect every time.

Cranial nerve II, the optic nerve sends nerve impulses to the brain carrying information about the things we see. These nerve fibers most likely belong to which division of the nervoussystem?

A patient is admitted to the hospital with exacerbation of multiple sclerosis (MS). She asks the nurse, "Why did this have to happen to me again? I was doing so well." Explain why some forms of MS arecharacterized by periods of remission and exacerbation.

Unipolar neurons have axons structurally divided into peripheral and central processes.

Select the correct statement regarding chemical synapses.

The period after an initial stimulus when a neuron is not sensitive to another stimulus is the________.

At the biochemical level, what is the explanation of the hyperpolarization phase at the conclusion of the action potential?

Which of the following is false or incorrect?

A chemical messenger that does not directly cause ESPSs or IPSPs but does affect the strength of synaptictransmission is a________.

Which of the following is not characteristic of neurons?

Neurons in the CNS are organized into functional groups.

Saltatory conduction is made possible by________.