Question 1

The basic functional unit of the nervous system is the ________.

Accepted Answer

The answer of The basic functional unit of the nervous...

Question 2

Figure 12-1 The Neuron
Use Figure 12-1 to answer the following questions:
-The structures labeled "1" are dendrites.Their membranes contain numerous chemically-gated ion channels.

Accepted Answer

A) The first statement is true but the second statement is false. 
B) The first statement is false but the second statement is true. 
C) Both statements are true. 
D) Both statements are false. 
E) Both statements are true and relate to synaptic transmission. 
A) The first statement is true but the second statement is false. 
B) The first statement is false but the second statement is true. 
C) Both statements are true. 
D) Both statements are false. 
E) Both statements are true and relate to synaptic transmission.

Question 3

A shift of the resting transmembrane potential toward 0 mV is called ________.

Accepted Answer

The answer of A shift of the resting transmembrane potential...

Question 4

If the axon terminal of a motor neuron suddenly became permeable to calcium ion,

Accepted Answer

A) the neuron will fire an action potential. 
B) the motor end plate will be depolarized. 
C) the motor end plate will be hyperpolarized. 
D) neurotransmitter release will be blocked. 
E) the neuron will become unable to stimulate the muscle cell. 
A) the neuron will fire an action potential. 
B) the motor end plate will be depolarized. 
C) the motor end plate will be hyperpolarized. 
D) neurotransmitter release will be blocked. 
E) the neuron will become unable to stimulate the muscle cell.

Question 5

If the sodium-potassium pumps in the plasma membrane fail to function,all of the following occur,except

Accepted Answer

A) the intracellular concentration of potassium ions will increase. 
B) the neuron will slowly depolarize. 
C) the membrane will slowly lose its capacity to generate action potentials. 
D) the inside of the membrane will have a resting potential that is more positive than normal. 
E) the intracellular concentration of sodium ions will increase. 
A) the intracellular concentration of potassium ions will increase. 
B) the neuron will slowly depolarize. 
C) the membrane will slowly lose its capacity to generate action potentials. 
D) the inside of the membrane will have a resting potential that is more positive than normal. 
E) the intracellular concentration of sodium ions will increase.

Question 6

The sodium-potassium ion exchange pump

Accepted Answer

A) must reestablish ion concentrations after each action potential. 
B) transports sodium ions into the cell during depolarization. 
C) transports potassium ions out of the cell during repolarization. 
D) moves sodium and potassium opposite to the direction of their electrochemical gradients. 
E) depends on a hydrogen gradient for energy. 
A) must reestablish ion concentrations after each action potential. 
B) transports sodium ions into the cell during depolarization. 
C) transports potassium ions out of the cell during repolarization. 
D) moves sodium and potassium opposite to the direction of their electrochemical gradients. 
E) depends on a hydrogen gradient for energy.

Question 7

Figure 12-1 The Neuron
Use Figure 12-1 to answer the following questions:
-Which part of the neuron can propagate an action potential?

Accepted Answer

A) 1 
B) 1 and 2 
C) 2 and 3 
D) 3 
A) 1 
B) 1 and 2 
C) 2 and 3 
D) 3

Question 8

The cytoplasm that surrounds the nucleus of a neuron is called the

Accepted Answer

A) protoplasm. 
B) nucleoplasm. 
C) sarcoplasm. 
D) neuroplasm. 
E) perikaryon. 
A) protoplasm. 
B) nucleoplasm. 
C) sarcoplasm. 
D) neuroplasm. 
E) perikaryon.

Question 9

Which of the following does not influence the time necessary for a nerve impulse to be transmitted?

Accepted Answer

A) length of the axon 
B) presence or absence of a myelin sheath 
C) diameter of the axon 
D) presence or absence of nodes 
E) whether or not the impulse begins in the CNS 
A) length of the axon 
B) presence or absence of a myelin sheath 
C) diameter of the axon 
D) presence or absence of nodes 
E) whether or not the impulse begins in the CNS

Question 10

________ neurons are small and have no anatomical features that distinguish dendrites from axons.

Accepted Answer

A) Multipolar 
B) Anaxonic 
C) Unipolar 
D) Bipolar 
E) Sensory 
A) Multipolar 
B) Anaxonic 
C) Unipolar 
D) Bipolar 
E) Sensory

Question 11

What triggers the release of acetylcholine from a synaptic terminal?

Accepted Answer

A) release of calcium ions from the synaptic vesicles 
B) graded potentials in the synaptic terminal 
C) synaptic vesicles fuse to dendrites 
D) diffusion of sodium ions out of the synaptic terminal 
E) diffusion of calcium ions into the synaptic terminal 
A) release of calcium ions from the synaptic vesicles 
B) graded potentials in the synaptic terminal 
C) synaptic vesicles fuse to dendrites 
D) diffusion of sodium ions out of the synaptic terminal 
E) diffusion of calcium ions into the synaptic terminal

Question 12

Figure 12-2 The Nerve Action Potential
Use Figure 12-2 to answer the following questions:
-Which point of the graph shows when potassium ion outflow exceeds sodium ion inflow?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
A) 1 
B) 2 
C) 3 
D) 4

Question 13

________ channels open or close in response to physical distortion of the membrane surface.

Accepted Answer

A) Voltage-gated 
B) Chemically-gated 
C) Active 
D) Mechanically-gated 
E) Leak 
A) Voltage-gated 
B) Chemically-gated 
C) Active 
D) Mechanically-gated 
E) Leak

Question 14

Figure 12-1 The Neuron
Use Figure 12-1 to answer the following questions:
-Which type of membrane channels are found at label "3"?

Accepted Answer

A) voltage-gated Na⁺ channels 
B) voltage-gated K⁺ channels 
C) chemically-gated Na⁺ and K⁺ channels 
D) voltage-gated Ca²⁺ channels 
E) both voltage-gated Na⁺ channels and voltage-gated K⁺ channels 
A) voltage-gated Na⁺ channels 
B) voltage-gated K⁺ channels 
C) chemically-gated Na⁺ and K⁺ channels 
D) voltage-gated Ca²⁺ channels 
E) both voltage-gated Na⁺ channels and voltage-gated K⁺ channels

Question 15

________ carry motor information to peripheral effectors.(Note: Be sure to capitalize the first letter of your answer).

Accepted Answer

The answer of ________ carry motor information to peripheral effectors.(Note:...

Question 16

________ line the brain ventricles and spinal canal.

Accepted Answer

A) Astrocytes 
B) Satellite cells 
C) Oligodendrocytes 
D) Microglia 
E) Ependymal cells 
A) Astrocytes 
B) Satellite cells 
C) Oligodendrocytes 
D) Microglia 
E) Ependymal cells

Question 17

Products from the soma of a neuron are transported to the synaptic terminals by ________ axoplasmic transport.

Accepted Answer

The answer of Products from the soma of a neuron...

Question 18

A movement of charges in response to a potential difference is called a ________.

Accepted Answer

The answer of A movement of charges in response to...

Question 19

Which of the following activities or sensations is not monitored by interoceptors?

Accepted Answer

A) sight 
B) taste 
C) activities of the digestive system 
D) cardiovascular activities 
E) urinary activities 
A) sight 
B) taste 
C) activities of the digestive system 
D) cardiovascular activities 
E) urinary activities

Question 20

When a second EPSP arrives at a single synapse before the effects of the first have disappeared,what occurs?

Accepted Answer

A) spatial summation 
B) temporal summation 
C) inhibition of the impulse 
D) hyperpolarization 
E) decrease in speed of impulse transmission 
A) spatial summation 
B) temporal summation 
C) inhibition of the impulse 
D) hyperpolarization 
E) decrease in speed of impulse transmission

Exam 12: Neural Tissue

The basic functional unit of the nervous system is the ________.

Figure 12-1 The Neuron Use Figure 12-1 to answer the following questions: -The structures labeled "1" are dendrites.Their membranes contain numerous chemically-gated ion channels.

A shift of the resting transmembrane potential toward 0 mV is called ________.

If the axon terminal of a motor neuron suddenly became permeable to calcium ion,

If the sodium-potassium pumps in the plasma membrane fail to function,all of the following occur,except

The sodium-potassium ion exchange pump

Figure 12-1 The Neuron Use Figure 12-1 to answer the following questions: -Which part of the neuron can propagate an action potential?

The cytoplasm that surrounds the nucleus of a neuron is called the

Which of the following does not influence the time necessary for a nerve impulse to be transmitted?

________ neurons are small and have no anatomical features that distinguish dendrites from axons.

What triggers the release of acetylcholine from a synaptic terminal?

Figure 12-2 The Nerve Action Potential Use Figure 12-2 to answer the following questions: -Which point of the graph shows when potassium ion outflow exceeds sodium ion inflow?

________ channels open or close in response to physical distortion of the membrane surface.

Figure 12-1 The Neuron Use Figure 12-1 to answer the following questions: -Which type of membrane channels are found at label "3"?

________ carry motor information to peripheral effectors.(Note: Be sure to capitalize the first letter of your answer).

________ line the brain ventricles and spinal canal.

Products from the soma of a neuron are transported to the synaptic terminals by ________ axoplasmic transport.

A movement of charges in response to a potential difference is called a ________.

Which of the following activities or sensations is not monitored by interoceptors?

When a second EPSP arrives at a single synapse before the effects of the first have disappeared,what occurs?

An Introduction to Anatomy and Physiology

The Chemical Level of Organization

The Cellular Level of Organization

The Tissue Level of Organization

The Integumentary System

Osseous Tissue and Bone Structure

The Axial Skeleton

The Appendicular Skeleton

Articulations

Muscle Tissue

The Muscular System

The Spinal Cord, spinal Nerves, and Spinal Reflexes

The Brain and Cranial Nerves

Neural Integration I: Sensory Pathways and the Somatic Nervous System

Neural Integration Ii: the Autonomic Nervous System and

The Special Senses

The Endocrine System

Blood

The Heart

Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism and Energetics

The Urinary System

Fluid, electrolyte, and Acid-Base Balance

The Reproductive System

Development and Inheritance

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