Question 1

The electrochemical gradient refers to

Accepted Answer

A) the difference in concentration of a substance between two areas. 
B) the difference in electrical charge between two areas. 
C) the combination of electrical and chemical gradients between two areas. 
D) the resistance a membrane has to allowing any charged chemical to pass through it. 
A) the difference in concentration of a substance between two areas. 
B) the difference in electrical charge between two areas. 
C) the combination of electrical and chemical gradients between two areas. 
D) the resistance a membrane has to allowing any charged chemical to pass through it.

Question 2

Which statement is consistent with the current understanding of neural tissue

Accepted Answer

A) A person is born with all of the neurons they will ever have. 
B) Most neurons formed in fetal development last a lifetime,but some brain regions in adults can generate new neurons. 
C) Neurons are constantly dying and being replaced throughout all regions of the brain. 
D) Stem cells in the brain become glia,which can later become neurons if there is a need for them to do so. 
A) A person is born with all of the neurons they will ever have. 
B) Most neurons formed in fetal development last a lifetime,but some brain regions in adults can generate new neurons. 
C) Neurons are constantly dying and being replaced throughout all regions of the brain. 
D) Stem cells in the brain become glia,which can later become neurons if there is a need for them to do so.

Question 3

The function of myelin is to

Accepted Answer

A) block the transmission of a nerve impulse. 
B) provide points of attachment for nerve threads. 
C) produce faster nerve impulse propagation. 
D) produce slow but continuous impulse conduction. 
A) block the transmission of a nerve impulse. 
B) provide points of attachment for nerve threads. 
C) produce faster nerve impulse propagation. 
D) produce slow but continuous impulse conduction.

Question 4

Glial cells differ from neurons in that they

Accepted Answer

A) are larger and capable of meiosis. 
B) are smaller and capable of mitosis. 
C) are found only in the CNS. 
D) are found only in the PNS. 
E) transmit nerve impulses much more slowly. 
A) are larger and capable of meiosis. 
B) are smaller and capable of mitosis. 
C) are found only in the CNS. 
D) are found only in the PNS. 
E) transmit nerve impulses much more slowly.

Question 5

The afferent division of the nervous system is also known as the _____ division.

Accepted Answer

A) motor 
B) cranial 
C) ganglial 
D) efferent 
E) sensory 
A) motor 
B) cranial 
C) ganglial 
D) efferent 
E) sensory

Question 6

Along an axon,the gaps between neurolemmocytes are called neurofibril ________.

Accepted Answer

The answer of Along an axon,the gaps between neurolemmocytes are...

Question 7

Billions of CNS interneurons are grouped in complex patterns called neuronal

Accepted Answer

A) networks. 
B) complexes. 
C) pools. 
D) meshes. 
E) webs. 
A) networks. 
B) complexes. 
C) pools. 
D) meshes. 
E) webs.

Question 8

Choose the answer that correctly lists,in chronological order,the events involved in synaptic transmission.
A: A nerve impulse reaches the synaptic knob.
B: Neurotransmitter molecules diffuse across the synaptic cleft.
C: A nerve impulse begins in the postsynaptic cell.
D: Neurotransmitter molecules bind to receptors in the postsynaptic cell.
E: A voltage change occurs in the postsynaptic cell.

Accepted Answer

A) a,c,b,d,e 
B) a,b,e,d,c 
C) c,b,d,e,a 
D) a,b,d,e,c 
E) c,a,b,d,e 
A) a,c,b,d,e 
B) a,b,e,d,c 
C) c,b,d,e,a 
D) a,b,d,e,c 
E) c,a,b,d,e

Question 9

Following damage to axons nearby,oligodendrocytes

Accepted Answer

A) secrete growth factors. 
B) do not secrete any chemicals. 
C) secrete growth-inhibitory molecules. 
D) grow their own fibers to occupy the space. 
A) secrete growth factors. 
B) do not secrete any chemicals. 
C) secrete growth-inhibitory molecules. 
D) grow their own fibers to occupy the space.

Question 10

The type of neuronal circuit that uses feedback to produce a repeated,cyclical stimulation of the circuit is a _____________ circuit.

Accepted Answer

A) converging 
B) diverging 
C) reverberating 
D) parallel-after-discharge 
E) None of the choices is correct. 
A) converging 
B) diverging 
C) reverberating 
D) parallel-after-discharge 
E) None of the choices is correct.

Question 11

When a neurotransmitter opens a chemically gated ion channel that allows sodium to enter the postsynaptic cell,the result is an

Accepted Answer

A) EPSP. 
B) IPSP. 
A) EPSP. 
B) IPSP.

Question 12

Some inhibitory neurotransmitters exert their effect by causing the opening of chloride channels,which results in the postsynaptic membrane becoming more negative.

Accepted Answer

A) True 
 B)False

Question 13

Which is not a type of neuronal pool

Accepted Answer

A) Converging 
B) Triangular-pre-discharge 
C) Diverging 
D) Parallel-after-discharge 
E) Reverberating 
A) Converging 
B) Triangular-pre-discharge 
C) Diverging 
D) Parallel-after-discharge 
E) Reverberating

Question 14

A tumor can occur in any tissue within the CNS.

Accepted Answer

A) True 
 B)False

Question 15

Which is true regarding the action of a neurolemmocyte

Accepted Answer

A) Each neurolemmocyte can form a myelin sheath around many axons simultaneously. 
B) A neurolemmocyte is responsible for forming part of the blood-brain barrier. 
C) Neurolemmocytes function only within the CNS. 
D) Each neurolemmocyte can wrap only a 1 mm portion of a single axon. 
E) A neurolemmocyte attacks pathogens. 
A) Each neurolemmocyte can form a myelin sheath around many axons simultaneously. 
B) A neurolemmocyte is responsible for forming part of the blood-brain barrier. 
C) Neurolemmocytes function only within the CNS. 
D) Each neurolemmocyte can wrap only a 1 mm portion of a single axon. 
E) A neurolemmocyte attacks pathogens.

Question 16

The neurons that are responsible for integrating information by retrieving,processing,storing,and "deciding" how the body responds to stimuli are

Accepted Answer

A) sensory neurons. 
B) motor neurons. 
C) accessory neurons. 
D) correlation neurons. 
E) interneurons. 
A) sensory neurons. 
B) motor neurons. 
C) accessory neurons. 
D) correlation neurons. 
E) interneurons.

Question 17

___________ is the release of chemicals that locally regulate the response of neurons to neurotransmitters.

Accepted Answer

The answer of ___________ is the release of chemicals that...

Question 18

Of the two types of synapses,based on mode of communication,which is less common but allows faster signal transmission

Accepted Answer

A) Chemical synapse 
B) Mechanical synapse 
C) Physical synapse 
D) Magnetic synapse 
E) Electrical synapse 
A) Chemical synapse 
B) Mechanical synapse 
C) Physical synapse 
D) Magnetic synapse 
E) Electrical synapse

Question 19

The glial cell that helps to circulate cerebrospinal fluid is the

Accepted Answer

A) astrocyte. 
B) ependymal cell. 
C) neurolemmocyte. 
D) microglial cell. 
E) oligodendrocyte. 
A) astrocyte. 
B) ependymal cell. 
C) neurolemmocyte. 
D) microglial cell. 
E) oligodendrocyte.

Question 20

Voltage-gated sodium channels at a neuron's initial segment are triggered to open when the membrane becomes more positive.

Accepted Answer

A) True 
 B)False

Exam 12: Nervous System: Nervous Tissue

The electrochemical gradient refers to

Which statement is consistent with the current understanding of neural tissue

The function of myelin is to

Glial cells differ from neurons in that they

The afferent division of the nervous system is also known as the _____ division.

Along an axon,the gaps between neurolemmocytes are called neurofibril ________.

Billions of CNS interneurons are grouped in complex patterns called neuronal

Following damage to axons nearby,oligodendrocytes

The type of neuronal circuit that uses feedback to produce a repeated,cyclical stimulation of the circuit is a _____________ circuit.

When a neurotransmitter opens a chemically gated ion channel that allows sodium to enter the postsynaptic cell,the result is an

Some inhibitory neurotransmitters exert their effect by causing the opening of chloride channels,which results in the postsynaptic membrane becoming more negative.

Which is not a type of neuronal pool

A tumor can occur in any tissue within the CNS.

Which is true regarding the action of a neurolemmocyte

The neurons that are responsible for integrating information by retrieving,processing,storing,and "deciding" how the body responds to stimuli are

___________ is the release of chemicals that locally regulate the response of neurons to neurotransmitters.

Of the two types of synapses,based on mode of communication,which is less common but allows faster signal transmission

The glial cell that helps to circulate cerebrospinal fluid is the

Voltage-gated sodium channels at a neuron's initial segment are triggered to open when the membrane becomes more positive.

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