Question 1

Match the following concerning concentration differences across the plasma membrane.
-higher inside cell

Accepted Answer

A) concentration of potassium 
B) concentration of sodium and chloride 
C) negatively charged proteins 
D) sodium/potassium pump 
E) plasma membrane is more permeable to this ion because of leak ion channels 
A) concentration of potassium 
B) concentration of sodium and chloride 
C) negatively charged proteins 
D) sodium/potassium pump 
E) plasma membrane is more permeable to this ion because of leak ion channels

Question 2

When two or more presynaptic neurons synapse with a single postsynaptic neuron in the CNS, a(n) _______ pathway is formed.

Accepted Answer

A)  convergent 
B)  divergent 
C)  reverberating 
D)  somatic 
E)  sensory 
A)  convergent 
B)  divergent 
C)  reverberating 
D)  somatic 
E)  sensory

Question 3

Nerve fibers are also called ____________.

Accepted Answer

The answer of Nerve fibers are also called ____________....

Question 4

-The figure illustrates the Action Potential. What does "A" represent?

Accepted Answer

A)  repolarization 
B)  depolarization 
C)  local potential 
D)  threshold 
E)  afterpotential 
A)  repolarization 
B)  depolarization 
C)  local potential 
D)  threshold 
E)  afterpotential

Question 5

For the resting membrane potential, increasing the sodium ion concentration in the ECF results in

Accepted Answer

A)  hyperpolarization. 
B)  depolarization. 
C)  hypopolarization. 
D)  little change in membrane potential. 
E)  There is not enough information to determine the results. 
A)  hyperpolarization. 
B)  depolarization. 
C)  hypopolarization. 
D)  little change in membrane potential. 
E)  There is not enough information to determine the results.

Question 6

Synaptic vesicles contain neurotransmitters and are present in the

Accepted Answer

A)  dendrites. 
B)  cell body. 
C)  axolemma. 
D)  presynaptic terminals. 
E)  trigger zone. 
A)  dendrites. 
B)  cell body. 
C)  axolemma. 
D)  presynaptic terminals. 
E)  trigger zone.

Question 7

Which of the following is mismatched?

Accepted Answer

A)  microglia - provide support for the neuron cell body 
B)  astrocytes - blood-brain barrier 
C)  oligodendrocytes - form myelin sheaths 
D)  ependymal cells - produce cerebrospinal fluid 
E)  ependymal cells - choroid plexus 
A)  microglia - provide support for the neuron cell body 
B)  astrocytes - blood-brain barrier 
C)  oligodendrocytes - form myelin sheaths 
D)  ependymal cells - produce cerebrospinal fluid 
E)  ependymal cells - choroid plexus

Question 8

The plasma membrane of a neuron is more permeable to potassium ions because

Accepted Answer

A)  of its positive electrical charge. 
B)  there are more leak ion channels for K+ than Na+. 
C)  protein molecules cannot exit through the cell membrane. 
D)  calcium ions block Na+ and Cl- channels. 
E)  there are more leak ion channels for Na+ than K+. 
A)  of its positive electrical charge. 
B)  there are more leak ion channels for K+ than Na+. 
C)  protein molecules cannot exit through the cell membrane. 
D)  calcium ions block Na+ and Cl- channels. 
E)  there are more leak ion channels for Na+ than K+.

Question 9

The junction between two neurons is a

Accepted Answer

A)  ganglia. 
B)  synapse. 
C)  fascicle. 
D)  node of Ranvier. 
E)  neuromuscular junction. 
A)  ganglia. 
B)  synapse. 
C)  fascicle. 
D)  node of Ranvier. 
E)  neuromuscular junction.

Question 10

The absolute refractory period ends when

Accepted Answer

A)  inactivation gates of voltage-gated Na+ ion channels reopen. 
B)  activation gates of voltage-gates Na+ ion channels reopen. 
C)  the sodium-potassium exchange pump stops. 
D)  voltage-gated K+ channels open. 
E)  None of these choices is correct. 
A)  inactivation gates of voltage-gated Na+ ion channels reopen. 
B)  activation gates of voltage-gates Na+ ion channels reopen. 
C)  the sodium-potassium exchange pump stops. 
D)  voltage-gated K+ channels open. 
E)  None of these choices is correct.

Question 11

-Identify structure "B" on the neuron.

Accepted Answer

A)  Schwann cell 
B)  Node of Ranvier 
C)  neuron cell body (soma) 
D)  dendrites 
E)  axon 
A)  Schwann cell 
B)  Node of Ranvier 
C)  neuron cell body (soma) 
D)  dendrites 
E)  axon

Question 12

Damage to a postsynaptic membrane would

Accepted Answer

A)  increase neurotransmitter release. 
B)  decrease the release of neurotransmitter. 
C)  increase neurotransmitter production. 
D)  interfere with the ability to respond to neurotransmitter. 
E)  destroy vesicles containing neurotransmitter. 
A)  increase neurotransmitter release. 
B)  decrease the release of neurotransmitter. 
C)  increase neurotransmitter production. 
D)  interfere with the ability to respond to neurotransmitter. 
E)  destroy vesicles containing neurotransmitter.

Question 13

What inhibitory neurotransmitter is blocked in strychnine poisoning?

Accepted Answer

A)  glycine 
B)  acetylcholine 
C)  glutamate 
D)  adenosine 
A)  glycine 
B)  acetylcholine 
C)  glutamate 
D)  adenosine

Question 14

____________ are processes that conduct electric signals toward the cell body.

Accepted Answer

The answer of ____________ are processes that conduct electric signals...

Question 15

Gray matter on the surface of the brain is/are called

Accepted Answer

A)  the cortex. 
B)  nuclei. 
C)  ganglia. 
D)  tracts. 
A)  the cortex. 
B)  nuclei. 
C)  ganglia. 
D)  tracts.

Question 16

Match the neuroglial cell with its function.
-microglia

Accepted Answer

A) influence function of blood-brain barrier 
B) macrophages in CNS 
C) produce cerebrospinal fluid 
D) form myelin sheath around axons in CNS 
E) form myelin sheath around part of the axon in the PNS 
A) influence function of blood-brain barrier 
B) macrophages in CNS 
C) produce cerebrospinal fluid 
D) form myelin sheath around axons in CNS 
E) form myelin sheath around part of the axon in the PNS

Question 17

Gap junctions are functional __________ synapses.

Accepted Answer

A)  chemical 
B)  electrical 
C)  potential 
D)  intracellular 
E)  neuromuscular 
A)  chemical 
B)  electrical 
C)  potential 
D)  intracellular 
E)  neuromuscular

Question 18

-The figure is a process figure of the chemical synapse. What does "D" represent?

Accepted Answer

A)  postsynaptic membrane 
B)  synaptic cleft 
C)  synaptic vesicle 
D)  voltage-gated calcium channel 
E)  presynaptic terminal 
A)  postsynaptic membrane 
B)  synaptic cleft 
C)  synaptic vesicle 
D)  voltage-gated calcium channel 
E)  presynaptic terminal

Question 19

Saltatory conduction of an action potential means that

Accepted Answer

A)  once one action potential is created, it moves down the axon. 
B)  the whole axon depolarizes at the same time. 
C)  one action potential stimulates the production of a new action potential at the adjacent site. 
D)  an action potential is conducted from one node of Ranvier to the next node. 
A)  once one action potential is created, it moves down the axon. 
B)  the whole axon depolarizes at the same time. 
C)  one action potential stimulates the production of a new action potential at the adjacent site. 
D)  an action potential is conducted from one node of Ranvier to the next node.

Question 20

Which of the following statements regarding voltage-gated K+ channels is true?

Accepted Answer

A)  These channels have only one gate. 
B)  These channels open more slowly than Na+ channels. 
C)  Once open, these channels remain open until repolarization is complete. 
D)  These channels are specific for potassium. 
E)  All of these statements are true. 
A)  These channels have only one gate. 
B)  These channels open more slowly than Na+ channels. 
C)  Once open, these channels remain open until repolarization is complete. 
D)  These channels are specific for potassium. 
E)  All of these statements are true.

Exam 11: Functional Organization of Nervous Tissue

Match the following concerning concentration differences across the plasma membrane. -higher inside cell

When two or more presynaptic neurons synapse with a single postsynaptic neuron in the CNS, a(n) _______ pathway is formed.

Nerve fibers are also called ____________.

-The figure illustrates the Action Potential. What does "A" represent?

For the resting membrane potential, increasing the sodium ion concentration in the ECF results in

Synaptic vesicles contain neurotransmitters and are present in the

Which of the following is mismatched?

The plasma membrane of a neuron is more permeable to potassium ions because

The junction between two neurons is a

The absolute refractory period ends when

-Identify structure "B" on the neuron.

Damage to a postsynaptic membrane would

What inhibitory neurotransmitter is blocked in strychnine poisoning?

____________ are processes that conduct electric signals toward the cell body.

Gray matter on the surface of the brain is/are called

Match the neuroglial cell with its function. -microglia

Gap junctions are functional __________ synapses.

-The figure is a process figure of the chemical synapse. What does "D" represent?

Saltatory conduction of an action potential means that

Which of the following statements regarding voltage-gated K+ channels is true?

The Human Organism

The Chemical Basis of Life

Cell Biology

Tissues

Integumentary System

Skeletal System: Bones and Bone Tissue

Skeletal System: Gross Anatomy

Joints and Movement

Muscular System: Histology and Physiology

Muscular System: Gross Anatomy

Spinal Cord and Spinal Nerves

Brain and Cranial Nerves

Integration of Nervous System Functions

The Special Senses

Autonomic Nervous System

Functional Organization of the Endocrine System

Endocrine Glands

Cardiovascular System: Blood

Cardiovascular System: the Heart

Cardiovascular System: Blood Vessels and Circulation

Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition, Metabolism, and Temperature Regulation

Urinary System

Water, Electrolytes, and Acidbase Balance

Reproductive System

Development, Growth, Aging, and Genetics

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