BSC2346 Module 6 Quiz Latest 2018 (Already graded A+)

BSC2346 Module 6 Quiz Latest 2018

Question 1

The generation or creation of an action potential depends on the strength of the stimulus a neuron receives?

Answers:

True

False

Question 2

Which statement is NOT true regarding the neuron synapse?

Answers:

A. A neurotransmitter bound to a postsynaptic neuron membrane will affect its permeability of certain ions

B. Binding of a neurotransmitter on the postsynaptic neuron membrane can generate an action potential in that neuron

C. The presynaptic and postsynaptic neuron membranes are separated by the synaptic cleft

D. The binding of a neurotransmitter always causes an excitatory effect on that cell, never inhibitory

Question 3

Which statement is NOT true regarding neurons?

Answers:

A. Interneurons are found in both the central and peripheral nervous system

B. Motor (efferent) neurons transmit information from the central nervous system to the peripheral nervous system

C. Sensory (afferent) neurons transmit information from the peripheral nervous system to the central nervous system

D. Sensory (afferent) and Motor (efferent) neurons are considered part of the peripheral nervous system

Question 4

Which statement is true regarding neurons?

Answers:

A. The are only found in the central nervous system

B. All axons have myelin sheaths surrounding them

C. Dendrites pass information from the neuron to another cell

D. The action potential is transmitted from the cell body to the axon terminal

Question 5

During relative refractory period, a neuron cannot create another action potential to a stimulus no matter how strong or intense that stimulus is?

Answers:

True

False

Question 6

Which statement is NOT true regarding the nervous system?

Answers:

A. Neurons communicate with other cells through action potentials and the release of neurotransmitters

B. Depolarization is the reduction of the membrane potential; going from negative to a more positive charge

C. Damaged myelin on an axon has no effect with its ability to transmit an action potential

D. Neuroglia cells play a vital role in neuron function

Question 7

Which statement is true regarding the action potential process?

Answers:

A. The action potential process only occurs at the nodes of Ranvier in myelinated axons

B. Hyperpolarization allows for Na+ and K+ ions to move into and out of the cell

C. Depolarization occurs because voltage gated K+ channels allow K+ ions to rush into the cell

D. The repolarization phase must occur prior to depolarization

Question 8

Which statement is NOT true regarding action potentials (nerve impulses)?

Answers:

A. When action potentials reach the axon terminal, they cause the release of neurotransmitters?

B. Is typically only generated in the axon portion of a neuron

C. An action potential once started can be stopped or reversed

D. Neurons create action potentials when they are adequately stimulated

Question 9

During the repolarization phase of an action potential, the neuron begins to regain its negative internal charge?

Answers:

True

False

Question 10

Which statement is true regarding neurons?

Answers:

A. The nucleus of the neuron is located in the axon

B. Myelin sheaths provide protection to the axons but slow the nerve impulse (action potential) through it

C. Both the axons and dendrites receive information from other neurons and cells

D. Neurotransmitters are released from the axon terminal(s)

Question 11

Which statement is NOT true regarding the motor (efferent) division of the nervous system?

Answers:

A. Provides innervation to the muscles of the body

B. It is part of the peripheral nervous system

C. Transmits information from the central nervous system to the body

D. Pertains to sensory information/stimuli

Question 12

The resting membrane potential of a neuron, specifically in the axon, is more negatively charged inside when compared to the extracellular space (outside of the cell)?

Answers:

True

False

Question 13

Which choice is true regarding neuroglia cells?

Answers:

A. The majority of neuroglia cells are found in the peripheral nervous system

B. Oligodendrocytes produce myelin sheaths

C. Schwann cells function are located in the central nervous system

D. Astrocyte cells protect the neurons by acting almost like an immune cell

Question 14

Which choice is NOT true regarding myelin sheaths?

Answers:

A. Myelin sheaths are composed a whitish, fatty material and the spaces between each myelin sheath are called “nodes of Ranvier”

B. Myelin sheaths help release neurotransmitters from the axon terminal

C. Myelin sheaths cover axons in the central and peripheral nervous system

D. Myelin sheaths allow for the conduction of nerve impulses (action potentials) to be transmitted faster

Question 15

The autonomic nervous system is a sub-division of sensory (afferent) division?

Answers:

True

False