Question 1

Figure 11.2
Using Figure 11.2, match the following:
-Postsynaptic membrane.

Accepted Answer

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

Question 2

An action potential is regarded as an example of a positive feedback.Which of the following examples below best illustrates the positive feedback aspect of an action potential?

Accepted Answer

A)  The sodium potassium pump consistently moves ions as long as ATP is available, and regardless of membrane potential changes. 
B)  Potassium permeability is about 25 times greater than sodium ions. 
C)  Voltage gated potassium ion channels open slowly and remain open long enough to cause hyperpolarization. 
D)  A threshold stimulus will cause the opening of voltage gated sodium ion channels that will cause further depolarizing stimulus. This stimulus will open still more voltage gated sodium ion channels. 
A)  The sodium potassium pump consistently moves ions as long as ATP is available, and regardless of membrane potential changes. 
B)  Potassium permeability is about 25 times greater than sodium ions. 
C)  Voltage gated potassium ion channels open slowly and remain open long enough to cause hyperpolarization. 
D)  A threshold stimulus will cause the opening of voltage gated sodium ion channels that will cause further depolarizing stimulus. This stimulus will open still more voltage gated sodium ion channels.

Question 3

Match the following:
-The interior of the cell becomes less negative due to an influx of sodium ions.

Accepted Answer

A) Depolarization 
B) Action potential 
C) Relative refractory period 
D) Absolute refractory period 
E) Repolarization 
A) Depolarization 
B) Action potential 
C) Relative refractory period 
D) Absolute refractory period 
E) Repolarization

Question 4

If a post synaptic cell is stimulated to threshold by temporal summation this implies that ________.

Accepted Answer

A)  the postsynaptic cell can be influenced by only one presynaptic cell 
B)  the postsynaptic cell is sending frequent action potential 
C)  a presynaptic neuron is sending frequent EPSP 
D)  the presynaptic neuron is sending frequent IPSP 
A)  the postsynaptic cell can be influenced by only one presynaptic cell 
B)  the postsynaptic cell is sending frequent action potential 
C)  a presynaptic neuron is sending frequent EPSP 
D)  the presynaptic neuron is sending frequent IPSP

Question 5

Match the following:
-The specific period during which potassium ions diffuse out of the neuron due to a change in membrane permeability.

Accepted Answer

A) Depolarization 
B) Action potential 
C) Relative refractory period 
D) Absolute refractory period 
E) Repolarization 
A) Depolarization 
B) Action potential 
C) Relative refractory period 
D) Absolute refractory period 
E) Repolarization

Question 6

When one or more presynaptic neurons fire in rapid order it produces a much greater depolarization of the postsynaptic membrane than would result from a single EPSP; this event is called ________ summation.

Accepted Answer

The answer of When one or more presynaptic neurons fire...

Question 7

When a neurotransmitter like acetylcholine is acting in an excitatory manner which of the following is likely a result of the acetylcholine acting on the post synaptic cell?

Accepted Answer

A)  Chemically gated chloride channels will open. 
B)  Chemically gated potassium channels will open. 
C)  Chemically gated sodium channels will open. 
D)  Chemically gated sodium channels will be closed. 
A)  Chemically gated chloride channels will open. 
B)  Chemically gated potassium channels will open. 
C)  Chemically gated sodium channels will open. 
D)  Chemically gated sodium channels will be closed.

Question 8

Which of the following describes the nervous system integrative function?

Accepted Answer

A)  responds to stimuli by gland secretion or muscle contraction 
B)  analyzes sensory information, stores information, makes decisions 
C)  senses changes in the environment 
A)  responds to stimuli by gland secretion or muscle contraction 
B)  analyzes sensory information, stores information, makes decisions 
C)  senses changes in the environment

Question 9

Which of the following is not a chemical class of neurotransmitters?

Accepted Answer

A)  biogenic amine 
B)  nucleic acid 
C)  amino acid 
D)  ATP and other purines 
A)  biogenic amine 
B)  nucleic acid 
C)  amino acid 
D)  ATP and other purines

Question 10

Figure 11.1
Using Figure 11.1, match the following:
-Which neuron is a sensory neuron found in a reflex arc?

Accepted Answer

A) C 
B) B 
C) A 
A) C 
B) B 
C) A

Question 11

What function is served by the increased axon diameter at the nodes of Ranvier?

Accepted Answer

Increased diameter results in

Question 12

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 are characterized by periods of remission and exacerbation.

Accepted Answer

Even though someone is diagnosed with MS

Question 13

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

Accepted Answer

A) True 
 B)False

Question 14

A stimulus traveling toward a synapse appears to open calcium ion channels at the presynaptic end,which in turn promotes fusion of synaptic vesicles to the axonal membrane.

Accepted Answer

A) True 
 B)False

Question 15

What is the difference between a direct acting neurotransmitter and an indirect acting neurotransmitter?

Accepted Answer

Direct acting neurotransmitter

Exam 11: Fundamentals of the Nervous System and Nervous Tissue

Figure 11.2 Using Figure 11.2, match the following: -Postsynaptic membrane.

An action potential is regarded as an example of a positive feedback.Which of the following examples below best illustrates the positive feedback aspect of an action potential?

Match the following: -The interior of the cell becomes less negative due to an influx of sodium ions.

If a post synaptic cell is stimulated to threshold by temporal summation this implies that ________.

Match the following: -The specific period during which potassium ions diffuse out of the neuron due to a change in membrane permeability.

When one or more presynaptic neurons fire in rapid order it produces a much greater depolarization of the postsynaptic membrane than would result from a single EPSP; this event is called ________ summation.

When a neurotransmitter like acetylcholine is acting in an excitatory manner which of the following is likely a result of the acetylcholine acting on the post synaptic cell?

Which of the following describes the nervous system integrative function?

Which of the following is not a chemical class of neurotransmitters?

Figure 11.1 Using Figure 11.1, match the following: -Which neuron is a sensory neuron found in a reflex arc?

What function is served by the increased axon diameter at the nodes of Ranvier?

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 are characterized by periods of remission and exacerbation.

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

A stimulus traveling toward a synapse appears to open calcium ion channels at the presynaptic end,which in turn promotes fusion of synaptic vesicles to the axonal membrane.

What is the difference between a direct acting neurotransmitter and an indirect acting neurotransmitter?

The Human Body: an Orientation

Chemistry Comes Alive

Cells: the Living Units

Tissue: the Living Fabric

The Integumentary System

Bones and Skeletal Tissue

The Skeleton

Joints

Muscles and Muscle Tissue

The Muscular System

The Central Nervous System

The Peripheral Nervous System and Reflex Activity

The Autonomic Nervous System

The Special Senses

The Endocrine System

Blood

The Cardiovascular System: the Heart

The Cardiovascular System: Blood Vessels

The Lymphatic System and Lymphoid Organs and Tissues

The Immune System: Innate and Adaptive Body Defenses

The Respiratory System

The Digestive System

Nutrition,metabolism,and Body Temperature Regulation

The Urinary System

Fluid,electrolyte,and Acid-Base Balance

The Reproductive System

Pregnancy and Human Development

Heredity

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