Question 1

In the context of the nervous system, what does the term "nucleus" mean? ​

Accepted Answer

A) a cluster of EPSPs converging on an axonal hillock 
B) a cluster of IPSPs converging on an axonal hillock 
C) a cluster of axon terminals converging on a single neuron 
D) a cluster of dendrites centralized on a single neuron 
E) a cluster of neurons in the central nervous system with a related function 
A) a cluster of EPSPs converging on an axonal hillock 
B) a cluster of IPSPs converging on an axonal hillock 
C) a cluster of axon terminals converging on a single neuron 
D) a cluster of dendrites centralized on a single neuron 
E) a cluster of neurons in the central nervous system with a related function

Question 2

Neurotransmitters that bind to G-protein coupled receptors act more rapidly than those binding to ionotropic receptors.

Accepted Answer

A) True 
 B)False

Question 3

Place the events in chemical synapse transmission in the correct order.
​1.Ca2+ enters axon terminal.
2. Ligand-gated ion channels open in postsynaptic membrane.
3.Neurotransmitter binds to postsynaptic receptor.
4.Action potential reaches axon terminal of presynaptic neuron.
5.Neurotransmitter released by exocytosis.

Accepted Answer

A) 4, 1, 5, 3, 2 
B) 4, 3, 1, 5, 2 
C) 4, 5, 1, 3, 2 
D) 4, 1, 3, 5, 2 
E) 4, 5, 2, 3, 1 
A) 4, 1, 5, 3, 2 
B) 4, 3, 1, 5, 2 
C) 4, 5, 1, 3, 2 
D) 4, 1, 3, 5, 2 
E) 4, 5, 2, 3, 1

Question 4

If the equilibrium potential is close to the resting membrane potential, the net ionic movement across the membrane will be very small.

Accepted Answer

A) True 
 B)False

Question 5

Match between columns
                        Premises: causes a neuron membrane potential to become more negative, allowing it to approach its resting potential

Accepted Answer

The Answer of repolarization and hyperpolarization and depolarization is...

Question 6

The minimum level of depolarization required to initiate an action potential in an excitable cell is called the ____ potential. ​

Accepted Answer

A) electrical 
B) refractory 
C) membrane 
D) resting 
E) threshold 
A) electrical 
B) refractory 
C) membrane 
D) resting 
E) threshold

Question 7

Which cells assist and nourish neurons that transmit electrical signals? ​

Accepted Answer

A) receptor cells 
B) neurons 
C) effector cells 
D) glial cells 
E) signal cells 
A) receptor cells 
B) neurons 
C) effector cells 
D) glial cells 
E) signal cells

Question 8

If a drug inhibits the uptake of an excitatory neurotransmitter after it has been released into the synaptic cleft, what is the most likely result? ​

Accepted Answer

A) an increased number of IPSPs 
B) an increased number of EPSPs 
C) a prolonged hyperpolarization 
D) a decreased number of IPSPs 
E) a decreased number of EPSPs 
A) an increased number of IPSPs 
B) an increased number of EPSPs 
C) a prolonged hyperpolarization 
D) a decreased number of IPSPs 
E) a decreased number of EPSPs

Question 9

Afferent neurons carry electric impulses directly to muscles and glands.

Accepted Answer

A) True 
 B)False

Question 10

Match between columns
                        Premises: axon terminal of presynaptic cell

Accepted Answer

The Answer of  D and  A and  is...

Question 11

Answer the question using the accompanying figure. At which point in this action potential diagram does the onset of Na+ channel inactivation stop the inward flow of Na+? ​

Accepted Answer

A) ​A 
B) ​B 
C) ​C 
D) ​D 
E) ​E 
A) ​A 
B) ​B 
C) ​C 
D) ​D 
E) ​E

Question 12

Which glial cell(s)is/are only found in the peripheral nervous system? ​

Accepted Answer

A) Schwann cells 
B) oligodendrocytes 
C) astrocytes 
D) microglia 
E) saltatory cells 
A) Schwann cells 
B) oligodendrocytes 
C) astrocytes 
D) microglia 
E) saltatory cells

Question 13

For a neuron at rest, there is a higher concentration of ____ outside the cell than inside.

Accepted Answer

A) Na+ 
B) K+ 
C) Ca2+ 
D) anions 
E) ATP 
A) Na+ 
B) K+ 
C) Ca2+ 
D) anions 
E) ATP

Question 14

Match between columns
                        Premises: occurs in a postsynaptic membrane when ligand-gated NaS1U1P1+S1S1P0 channels open

Accepted Answer

The Answer of repolarization and depolarization and hyperpolarization is...

Question 15

To which class of neurotransmitters does glutamate belong?

Accepted Answer

A) acetylcholine 
B) monoamines 
C) amino acids 
D) neuropeptides 
E) gaseous neurotransmitters 
A) acetylcholine 
B) monoamines 
C) amino acids 
D) neuropeptides 
E) gaseous neurotransmitters

Question 16

Which part of the neuron conducts the electrical signals away from the cell body of a neuron?

Accepted Answer

A) axon terminal 
B) axon 
C) axon hillock 
D) nucleus 
E) dendrites 
A) axon terminal 
B) axon 
C) axon hillock 
D) nucleus 
E) dendrites

Question 17

Match between columns
                        Premises: occurs due to the diffusion of Na +S1S1P0

Accepted Answer

The Answer of hyperpolarization and repolarization and depolarization is...

Question 18

Which component of a neural signaling pathway sorts and interprets messages? ​

Accepted Answer

A) response 
B) integration 
C) transmission 
D) reception 
E) action 
A) response 
B) integration 
C) transmission 
D) reception 
E) action

Question 19

Cells in the nervous system that send and receive electrical signals are called ____. ​

Accepted Answer

A) receptors 
B) neurons 
C) sensors 
D) glial cells 
E) signal cells 
A) receptors 
B) neurons 
C) sensors 
D) glial cells 
E) signal cells

Question 20

The intensity of an electrical impulse is reflected in the ____ of action potentials. ​

Accepted Answer

A) frequency 
B) magnitude 
C) duration 
D) intensity 
E) the frequency and duration 
A) frequency 
B) magnitude 
C) duration 
D) intensity 
E) the frequency and duration

Exam 39: Information Flow and the Neuron

In the context of the nervous system, what does the term "nucleus" mean? ​

Neurotransmitters that bind to G-protein coupled receptors act more rapidly than those binding to ionotropic receptors.

If the equilibrium potential is close to the resting membrane potential, the net ionic movement across the membrane will be very small.

The minimum level of depolarization required to initiate an action potential in an excitable cell is called the ____ potential. ​

Which cells assist and nourish neurons that transmit electrical signals? ​

If a drug inhibits the uptake of an excitatory neurotransmitter after it has been released into the synaptic cleft, what is the most likely result? ​

Afferent neurons carry electric impulses directly to muscles and glands.

Answer the question using the accompanying figure. At which point in this action potential diagram does the onset of Na+ channel inactivation stop the inward flow of Na+? ​

Which glial cell(s)is/are only found in the peripheral nervous system? ​

For a neuron at rest, there is a higher concentration of ____ outside the cell than inside.

To which class of neurotransmitters does glutamate belong?

Which part of the neuron conducts the electrical signals away from the cell body of a neuron?

Which component of a neural signaling pathway sorts and interprets messages? ​

Cells in the nervous system that send and receive electrical signals are called ____. ​

The intensity of an electrical impulse is reflected in the ____ of action potentials. ​

Introduction to Biological Concepts and Research

Life, Chemistry, and Water

Biological Molecules: the Carbon Compounds of Life

Cells

Membranes and Transport

Energy, Enzymes, and Biological Reactions

Cellular Respiration: Harvesting Chemical Energy

Photosynthesis

Cell Communication

Cell Division and Mitosis

Meiosis: the Cellular Basis of Sexual Reproduction

Mendel, Genes, and Inheritance

Genes, Chromosomes, and Human Genetics

DNA Structure, Replication, and Organization

From DNA to Protein

Regulation of Gene Expression

Bacterial and Viral Genetics

Dna Technologies: Making and Using Genetically Altered Organisms, and Other Applications

Genomes and Proteomes

The Development of Evolutionary Thought

Microevolution: Genetic Changes Within Populations

Speciation

Paleobiology and Macroevolution

Systematic Biology: Phylogeny and Classification

The Origin of Life

Prokaryotes and Viruses

Protists

Seedless Plants

Seed Plants

Fungi

Animal Phylogeny, Acoelomates, and Protostomes

Deuterostomes: Vertebrates and Their Closest Relatives

The Plant Body

Transport in Plants

Plant Nutrition

Reproduction and Development in Flowering Plants

Plant Signals and Responses to the Environment

Introduction to Animal Organization and Physiology

Nervous Systems

Sensory Systems

The Endocrine System

Muscles, Bones, and Body Movements

The Circulatory System

Defenses Against Disease

Gas Exchange: the Respiratory System

Animal Nutrition

Regulating the Internal Environment

Animal Reproduction

Animal Development

Ecology and the Biosphere

Population Ecology

Population Interactions and Community Ecology

Ecosystems

Biodiversity and Conservation Biology

Animal Behavior

Filters

In the context of the nervous system, what does the term "nucleus" mean?

The minimum level of depolarization required to initiate an action potential in an excitable cell is called the ____ potential.

Which cells assist and nourish neurons that transmit electrical signals?

If a drug inhibits the uptake of an excitatory neurotransmitter after it has been released into the synaptic cleft, what is the most likely result?

Answer the question using the accompanying figure. At which point in this action potential diagram does the onset of Na⁺ channel inactivation stop the inward flow of Na⁺?

Which glial cell(s)is/are only found in the peripheral nervous system?

Which component of a neural signaling pathway sorts and interprets messages?

Cells in the nervous system that send and receive electrical signals are called ____.

The intensity of an electrical impulse is reflected in the ____ of action potentials.