Question 1

Which of the following assist and nourish cells that transmit electrical signals?

Accepted Answer

A) glial cells 
B) effector cells 
C) receptors 
D) neurons 
A) glial cells 
B) effector cells 
C) receptors 
D) neurons A

Question 2

How is the intensity of an electrical impulse reflected?

Accepted Answer

A) in the magnitude of action potentials 
B) in the frequency of action potentials 
C) in the duration of action potentials 
D) in the intensity of action potentials 
A) in the magnitude of action potentials 
B) in the frequency of action potentials 
C) in the duration of action potentials 
D) in the intensity of action potentials B

Question 3

What occurs when threshold potential is reached?

Accepted Answer

A) The activation gates of Na+ channels open. 
B) The inactivation gates of Na+ channels open. 
C) The activation gates of Na+ channels close. 
D) Na+/K+ active transport pumps are activated. 
A) The activation gates of Na+ channels open. 
B) The inactivation gates of Na+ channels open. 
C) The activation gates of Na+ channels close. 
D) Na+/K+ active transport pumps are activated. A

Question 4

Which of the following functions primarily in detecting and eliciting responses to environmental cues or stimuli?

Accepted Answer

A) the nervous system 
B) the endocrine system 
C) catabolism 
D) metabolism 
A) the nervous system 
B) the endocrine system 
C) catabolism 
D) metabolism

Question 5

Match each term with its description.
-resting potential

Accepted Answer

A) electrical potential difference across a plasma membrane 
B) subthreshold change in membrane potential toward the threshold potential of a neuron 
C) membrane potential of an excitable membrane when it is not being stimulated 
D) subthreshold change in membrane potential away from the threshold potential of a neuron 
E) abrupt, transient change in membrane potential, consisting of membrane depolarization followed by repolarization
F)minimum membrane potential required to form an action potential
G)any subthreshold change in membrane potential whose effects are additive 
A) electrical potential difference across a plasma membrane 
B) subthreshold change in membrane potential toward the threshold potential of a neuron 
C) membrane potential of an excitable membrane when it is not being stimulated 
D) subthreshold change in membrane potential away from the threshold potential of a neuron 
E) abrupt, transient change in membrane potential, consisting of membrane depolarization followed by repolarization
F)minimum membrane potential required to form an action potential
G)any subthreshold change in membrane potential whose effects are additive

Question 6

How is sensory information transmitted to the CNS?

Accepted Answer

A) by the efferent neurons of the autonomic nervous system 
B) by the somatic neurons of the peripheral nervous system 
C) by the somatic neurons of the sympathetic division 
D) by the afferent neurons of the peripheral nervous system 
A) by the efferent neurons of the autonomic nervous system 
B) by the somatic neurons of the peripheral nervous system 
C) by the somatic neurons of the sympathetic division 
D) by the afferent neurons of the peripheral nervous system

Question 7

Which of the following involves Na+?

Accepted Answer

A) resting membrane potential 
B) repolarization 
C) hyperpolarization 
D) depolarization 
A) resting membrane potential 
B) repolarization 
C) hyperpolarization 
D) depolarization

Question 8

Match each situation to the most appropriate term.
-occurs due to the diffusion of Na+

Accepted Answer

A) depolarization 
B) repolarization 
C) hyperpolarization 
A) depolarization 
B) repolarization 
C) hyperpolarization

Question 9

Explain how neuron action potential propagation rate can be increased.

Accepted Answer

Neuron action potential propagation can

Question 10

What happens as the action potential reaches its peak?

Accepted Answer

A) The inactivation gates of Na+ channels close. 
B) The activation gates of Na+ channels close. 
C) The inactivation gates of Na+ channels open. 
D) Na+/K+ active transport pumps are activated. 
A) The inactivation gates of Na+ channels close. 
B) The activation gates of Na+ channels close. 
C) The inactivation gates of Na+ channels open. 
D) Na+/K+ active transport pumps are activated.

Question 11

Which of the following is a reasonable estimation of the duration of an action potential?

Accepted Answer

A) approximately 5 microseconds 
B) approximately 5 milliseconds 
C) approximately 5 centiseconds 
D) approximately 5 seconds 
A) approximately 5 microseconds 
B) approximately 5 milliseconds 
C) approximately 5 centiseconds 
D) approximately 5 seconds

Question 12

Saltatory conduction is the slowest form of action potential propagation.

Accepted Answer

A) True 
 B)False

Question 13

In terms of changes in membrane potential, compare and contrast action potentials and graded potentials.

Accepted Answer

Action potentials are all-or-none phenom

Question 14

Match each term with its description.
-IPSP

Accepted Answer

A) electrical potential difference across a plasma membrane 
B) subthreshold change in membrane potential toward the threshold potential of a neuron 
C) membrane potential of an excitable membrane when it is not being stimulated 
D) subthreshold change in membrane potential away from the threshold potential of a neuron 
E) abrupt, transient change in membrane potential, consisting of membrane depolarization followed by repolarization
F)minimum membrane potential required to form an action potential
G)any subthreshold change in membrane potential whose effects are additive 
A) electrical potential difference across a plasma membrane 
B) subthreshold change in membrane potential toward the threshold potential of a neuron 
C) membrane potential of an excitable membrane when it is not being stimulated 
D) subthreshold change in membrane potential away from the threshold potential of a neuron 
E) abrupt, transient change in membrane potential, consisting of membrane depolarization followed by repolarization
F)minimum membrane potential required to form an action potential
G)any subthreshold change in membrane potential whose effects are additive

Question 15

Why is an action potential propagated down an unmyelinated neuron plasma membrane?

Accepted Answer

A) because the action potential stimulates voltage-gated Cl- channels adjacent to it 
B) because the action potential stimulates voltage-gated Ca2+ channels adjacent to it 
C) because the action potential stimulates voltage-gated Mg+ channels adjacent to it 
D) because the action potential stimulates voltage-gated Na+ channels adjacent to it 
A) because the action potential stimulates voltage-gated Cl- channels adjacent to it 
B) because the action potential stimulates voltage-gated Ca2+ channels adjacent to it 
C) because the action potential stimulates voltage-gated Mg+ channels adjacent to it 
D) because the action potential stimulates voltage-gated Na+ channels adjacent to it

Question 16

Which of the following is a characteristic of the autonomic nervous system?

Accepted Answer

A) It is a functional division of the central nervous system. 
B) It controls body movements that are under unconscious control. 
C) It is composed of parasympathetic and sympathetic divisions. 
D) It includes both afferent and efferent nerve fibres. 
A) It is a functional division of the central nervous system. 
B) It controls body movements that are under unconscious control. 
C) It is composed of parasympathetic and sympathetic divisions. 
D) It includes both afferent and efferent nerve fibres.

Question 17

Explain how the resting membrane potential and resting ion distributions are established in a neuron.

Accepted Answer

A resting membrane potential of -70 mV i

Question 18

Which term refers to the spaces between adjacent Schwann cells?

Accepted Answer

A) nodes of Ranvier 
B) axon terminals 
C) active gaps 
D) intercalated discs 
A) nodes of Ranvier 
B) axon terminals 
C) active gaps 
D) intercalated discs

Question 19

Neurotransmitters are stored in vesicles located within axon terminals.

Accepted Answer

A) True 
 B)False

Question 20

Which of the following refers to a graded, subthreshold change in the postsynaptic membrane potential that moves toward threshold?

Accepted Answer

A) depolarization 
B) IPSP 
C) hyperpolarization 
D) EPSP 
A) depolarization 
B) IPSP 
C) hyperpolarization 
D) EPSP

Exam 43: Control of Animal Processes: Neural Control

Which of the following assist and nourish cells that transmit electrical signals?

How is the intensity of an electrical impulse reflected?

What occurs when threshold potential is reached?

Which of the following functions primarily in detecting and eliciting responses to environmental cues or stimuli?

Match each term with its description. -resting potential

How is sensory information transmitted to the CNS?

Which of the following involves Na+?

Match each situation to the most appropriate term. -occurs due to the diffusion of Na+

Explain how neuron action potential propagation rate can be increased.

What happens as the action potential reaches its peak?

Which of the following is a reasonable estimation of the duration of an action potential?

Saltatory conduction is the slowest form of action potential propagation.

In terms of changes in membrane potential, compare and contrast action potentials and graded potentials.

Match each term with its description. -IPSP

Why is an action potential propagated down an unmyelinated neuron plasma membrane?

Which of the following is a characteristic of the autonomic nervous system?

Explain how the resting membrane potential and resting ion distributions are established in a neuron.

Which term refers to the spaces between adjacent Schwann cells?

Neurotransmitters are stored in vesicles located within axon terminals.

Which of the following refers to a graded, subthreshold change in the postsynaptic membrane potential that moves toward threshold?

Light and Life

The Cell: an Overview

Defining Life and Its Origins

Energy and Enzymes

Cell Membranes and Signalling

Cellular Respiration

Photosynthesis

Cell Cycles

Genetic Recombination

Mendel, Genes, and Inheritance

Genes, Chromosomes, and Human Genetics

Dna Structure, Replication, and Organization

Gene Structure and Expression

Control of Gene Expression

Dna Technologies

Genomes and Proteomes

Evolution: the Development of the Theory

Microevolution: Changes Within Populations

Species and Macroevolution

Understanding the History of Life on Earth

Humans and Evolution

Bacteria and Archaea

Viruses, Viroids, and Prions: Infectious Biological Particles

Protists

Fungi

Plants

Diversity of Animals 1: Sponges, Radiata, Platyhelminthes, and Protostomes

Diversity of Animals 2: Deuterostomes: Vertebrates and Their Closest Relatives

Population Ecology

Population Interactions and Community Ecology

Ecosystems

Conservation of Biodiversity

Putting Selection to Work

Organization of the Plant Body

Transport in Plants

Reproduction and Development in Flowering Plants

Plant Nutrition

Plant Signals and Responses to the Environment

Introduction to Animal Organization and Physiology

Transport in Animals: the Circulatory System

Reproduction in Animals

Animal Development

Control of Animal Processes: Neural Control

Control of Animal Processes: Neural Integration

Muscles, Skeletons, and Body Movements

Animal Behaviour

Animal Nutrition

Gas Exchange: the Respiratory System

Regulating the Internal Environment

Defences Against Disease

Conservation and Evolutionary Physiology

Filters

Which of the following involves Na⁺?

Match each situation to the most appropriate term. -occurs due to the diffusion of Na⁺