Question 1

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 2

Match the term with the correct definition.
-Resting Membrane Potential

Accepted Answer

A) a small change in the resting membrane potential confined to a small area 
B) a charge difference across the plasma membrane when the cell is in an unstimulated state 
C) a larger change in resting membrane potential that spreads over entire surface of a cell 
D) membrane becomes more positive when sodium ions diffuse into cell 
E) return to the resting membrane potential 
A) a small change in the resting membrane potential confined to a small area 
B) a charge difference across the plasma membrane when the cell is in an unstimulated state 
C) a larger change in resting membrane potential that spreads over entire surface of a cell 
D) membrane becomes more positive when sodium ions diffuse into cell 
E) return to the resting membrane potential

Question 3

Action potentials are conducted rapidly from one node of Ranvier to the next in a process called ____________ conduction.
saltatory

Accepted Answer

The answer of Action potentials are conducted rapidly from one...

Question 4

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.

Question 5

The enteric nervous system consists of plexuses within the walls of the

Accepted Answer

A)  brain. 
B)  spinal cord. 
C)  digestive tract. 
D)  urinary bladder. 
A)  brain. 
B)  spinal cord. 
C)  digestive tract. 
D)  urinary bladder.

Question 6

The motor (efferent) division of the peripheral nervous system

Accepted Answer

A)  is a division of the CNS. 
B)  regulates the digestion of food. 
C)  transmits impulses from the CNS to skeletal muscle. 
D)  has nerve cell bodies located in ganglia near the spinal cord and brain. 
E)  detects a stimulus. 
A)  is a division of the CNS. 
B)  regulates the digestion of food. 
C)  transmits impulses from the CNS to skeletal muscle. 
D)  has nerve cell bodies located in ganglia near the spinal cord and brain. 
E)  detects a stimulus.

Question 7

A stimulus either causes an action potential or it doesn't. This is called

Accepted Answer

A)  an all-or-none response. 
B)  a graded response. 
C)  a latent period response. 
D)  a relative refractory response. 
E)  a local response. 
A)  an all-or-none response. 
B)  a graded response. 
C)  a latent period response. 
D)  a relative refractory response. 
E)  a local response.

Question 8

During depolarization of the plasma membrane,

Accepted Answer

A)  sodium ions move rapidly into the cell. 
B)  potassium ions move rapidly out of the cell. 
C)  membrane permeability to sodium ions decreases. 
D)  the outside of the cell becomes positively charged relative to the inside. 
E)  sodium ions move rapidly out of the cell. 
A)  sodium ions move rapidly into the cell. 
B)  potassium ions move rapidly out of the cell. 
C)  membrane permeability to sodium ions decreases. 
D)  the outside of the cell becomes positively charged relative to the inside. 
E)  sodium ions move rapidly out of the cell.

Question 9

Nerve fibers are also called ____________.
axons

Accepted Answer

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

Question 10

Nervous tissue of the CNS that is composed primarily of myelinated axons is often referred to as ______ matter.

Accepted Answer

A)  white 
B)  light 
C)  gray 
D)  dark 
A)  white 
B)  light 
C)  gray 
D)  dark

Question 11

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 12

In an EPSP (excitatory postsynaptic potential), there is a

Accepted Answer

A)  net movement of sodium ions out of the cells. 
B)  net movement of chloride ions into the cells. 
C)  decrease in action potential amplitude. 
D)  local hyperpolarization. 
E)  local depolarization. 
A)  net movement of sodium ions out of the cells. 
B)  net movement of chloride ions into the cells. 
C)  decrease in action potential amplitude. 
D)  local hyperpolarization. 
E)  local depolarization.

Question 13

A change in resting membrane potential confined to a small area is called a(n)

Accepted Answer

A)  local potential. 
B)  action potential. 
C)  summated potential. 
D)  after potential. 
E)  resting membrane potential. 
A)  local potential. 
B)  action potential. 
C)  summated potential. 
D)  after potential. 
E)  resting membrane potential.

Question 14

The figure illustrates the Action Potential. What does "D" 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 15

Cell bodies of the peripheral nervous system are located in

Accepted Answer

A)  ganglia. 
B)  Schwann cells. 
C)  the motor division. 
D)  the sensory division. 
E)  nerves. 
A)  ganglia. 
B)  Schwann cells. 
C)  the motor division. 
D)  the sensory division. 
E)  nerves.

Question 16

The figure is a process figure of the chemical synapse. What does "A" 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 17

The sensory (afferent) division of the peripheral nervous system

Accepted Answer

A)  transmits action potentials to sensory organs. 
B)  conveys action potentials to the CNS. 
C)  stimulates glands to release hormones. 
D)  stimulates muscle contractions. 
E)  does not involve sensory receptors. 
A)  transmits action potentials to sensory organs. 
B)  conveys action potentials to the CNS. 
C)  stimulates glands to release hormones. 
D)  stimulates muscle contractions. 
E)  does not involve sensory receptors.

Question 18

Fran has a microbial infection attacking his brain. Which cell type would you expect to proliferate and be most active during this time?

Accepted Answer

A)  astrocytes 
B)  microglial cells 
C)  oligodendrocytes 
D)  ependymal cells 
E)  Schwann cells 
A)  astrocytes 
B)  microglial cells 
C)  oligodendrocytes 
D)  ependymal cells 
E)  Schwann cells

Question 19

Identify the type of synapse that includes a presynaptic cell, synaptic cleft, and postsynaptic cell.

Accepted Answer

A)  direct 
B)  indirect 
C)  neurotransmitter 
D)  electrical 
E)  chemical 
A)  direct 
B)  indirect 
C)  neurotransmitter 
D)  electrical 
E)  chemical

Question 20

The figure illustrates the Action Potential. What does "B" 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

Exam 11: Functional Organization of Nervous Tissue

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

Match the term with the correct definition. -Resting Membrane Potential

Action potentials are conducted rapidly from one node of Ranvier to the next in a process called ____________ conduction. saltatory

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

The enteric nervous system consists of plexuses within the walls of the

The motor (efferent) division of the peripheral nervous system

A stimulus either causes an action potential or it doesn't. This is called

During depolarization of the plasma membrane,

Nerve fibers are also called ____________. axons

Nervous tissue of the CNS that is composed primarily of myelinated axons is often referred to as ______ matter.

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

In an EPSP (excitatory postsynaptic potential), there is a

A change in resting membrane potential confined to a small area is called a(n)

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

Cell bodies of the peripheral nervous system are located in

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

The sensory (afferent) division of the peripheral nervous system

Fran has a microbial infection attacking his brain. Which cell type would you expect to proliferate and be most active during this time?

Identify the type of synapse that includes a presynaptic cell, synaptic cleft, and postsynaptic cell.

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

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, Electrolyte, and Acid-Based Balance

Reproductive System

Development, Growth, Aging, and Genetics

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