Question 1

Which of the following are types of neuroglia?

Accepted Answer

A)  microglia 
B)  ependymal cells 
C)  oligodendrocytes 
D)  astrocytes 
E)  all of the above 
A)  microglia 
B)  ependymal cells 
C)  oligodendrocytes 
D)  astrocytes 
E)  all of the above

Question 2

The sum of the electrical and chemical forces acting on an ion is known as its__________

Accepted Answer

electroche

Question 3

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

Accepted Answer

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

Question 4

Match the system with its components.
1. central nervous system
2. peripheral nervous system
3. somatic nervous system
4. autonomic nervous system
A) includes all neural tissue outside the CNS
B) includes the spinal cord and brain
C) controls visceral effectors
D) controls skeletal muscle contractions

Accepted Answer

1- B; 2- A

Question 5

Figure 11- 1 The Neuron
Use Figure 11- 1 to answer the following questions:
-The cytoplasm that surrounds the nucleus of a neuron is called the

Accepted Answer

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

Question 6

___________ monitor the position of skeletal muscles and joints

Accepted Answer

The answer of ___________ monitor the position of skeletal muscles...

Question 7

At an) ____________synapse, a neurotransmitter is released to stimulate the postsynaptic membrane.

Accepted Answer

The answer of At an) ____________synapse, a neurotransmitter is released...

Question 8

At the normal resting potential of a typical neuron, its Na- K ion exchange pump transports

Accepted Answer

A)  3 intracellular sodium ions for 1 extracellular potassium ion. 
B)  3 extracellular sodium ions for 2 intracellular potassium ions. 
C)  2 intracellular sodium ions for 1 extracellular potassium ion. 
D)  3 intracellular sodium ions for 2 extracellular potassium ions. 
E)  1 intracellular sodium ion for 2 extracellular potassium ions. 
A)  3 intracellular sodium ions for 1 extracellular potassium ion. 
B)  3 extracellular sodium ions for 2 intracellular potassium ions. 
C)  2 intracellular sodium ions for 1 extracellular potassium ion. 
D)  3 intracellular sodium ions for 2 extracellular potassium ions. 
E)  1 intracellular sodium ion for 2 extracellular potassium ions.

Question 9

The _________principle states that the size and speed of the action potential are independent of the stimulus strength.

Accepted Answer

The answer of The _________principle states that the size and...

Question 10

Branches that may occur along an axon are called

Accepted Answer

A)  synapses. 
B)  collaterals. 
C)  hillocks. 
D)  telodendria. 
E)  synaptic knobs. 
A)  synapses. 
B)  collaterals. 
C)  hillocks. 
D)  telodendria. 
E)  synaptic knobs.

Question 11

Figure 11- 2 The Nerve Action Potential
Use Figure 11- 2 to answer the following questions:
-When is the neuron in the refractory period?

Accepted Answer

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

Question 12

A drug that blocks ATP production is introduced into an isolated axon preparation. The axon is then repeatedly stimulated, and recordings are made of the response. What effects would you expect to observe?

Accepted Answer

Initially, the recording would show norm

Question 13

If the permeability of a resting axon to sodium ion increases,

Accepted Answer

A)  the membrane potential will depolarize. 
B)  outward movement of sodium ion will decrease. 
C)  inward movement of sodium ion will increase. 
D)  the membrane potential will hyperpolarize. 
E)  both A and C 
A)  the membrane potential will depolarize. 
B)  outward movement of sodium ion will decrease. 
C)  inward movement of sodium ion will increase. 
D)  the membrane potential will hyperpolarize. 
E)  both A and C

Question 14

___________-monitor the internal environment

Accepted Answer

The answer of ___________-monitor the internal environment...

Question 15

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

Accepted Answer

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

Question 16

In the process of continuous action potential propagation,

Accepted Answer

A)  the action potential is triggered by graded depolarization of the initial segment. 
B)  at threshold, sodium channels begin to open rapidly. 
C)  local currents depolarize the region just adjacent to the active zone. 
D)  local currents depolarize a sensitive spot distant from the active zone. 
E)  A, B, and C 
A)  the action potential is triggered by graded depolarization of the initial segment. 
B)  at threshold, sodium channels begin to open rapidly. 
C)  local currents depolarize the region just adjacent to the active zone. 
D)  local currents depolarize a sensitive spot distant from the active zone. 
E)  A, B, and C

Question 17

Extensive damage to oligodendrocytes in the CNS could result in

Accepted Answer

A)  a breakdown of the blood- brain barrier. 
B)  loss of sensation and motor control. 
C)  loss of the structural framework of the brain. 
D)  decreased production of cerebrospinal fluid. 
E)  inability to produce scar tissue at the site of an injury. 
A)  a breakdown of the blood- brain barrier. 
B)  loss of sensation and motor control. 
C)  loss of the structural framework of the brain. 
D)  decreased production of cerebrospinal fluid. 
E)  inability to produce scar tissue at the site of an injury.

Question 18

Which of the following comparisons between neurons and muscle tissue is false?

Accepted Answer

A)  Muscle fibers conduct action potentials at slow speeds. 
B)  Action potentials last longer in muscle fibers. 
C)  Resting potentials are greater in muscle fibers. 
D)  Muscle fibers conduct action potentials only by continuous propagation. 
E)  Action potentials are briefer in muscle fibers. 
A)  Muscle fibers conduct action potentials at slow speeds. 
B)  Action potentials last longer in muscle fibers. 
C)  Resting potentials are greater in muscle fibers. 
D)  Muscle fibers conduct action potentials only by continuous propagation. 
E)  Action potentials are briefer in muscle fibers.

Question 19

The minimum stimulus required to trigger an action potential is known as the_____________

Accepted Answer

The answer of The minimum stimulus required to trigger an...

Question 20

The equilibrium potential for potassium ion occurs at approximately

Accepted Answer

A)  0 mV. 
B)  -90 mV. 
C)  -70 mV. 
D)  +66 mV. 
E)  C or D 
A)  0 mV. 
B)  -90 mV. 
C)  -70 mV. 
D)  +66 mV. 
E)  C or D

Exam 11: Neural Tissue

Which of the following are types of neuroglia?

The sum of the electrical and chemical forces acting on an ion is known as its__________

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

Figure 11- 1 The Neuron Use Figure 11- 1 to answer the following questions: -The cytoplasm that surrounds the nucleus of a neuron is called the

___________ monitor the position of skeletal muscles and joints

At an) ____________synapse, a neurotransmitter is released to stimulate the postsynaptic membrane.

At the normal resting potential of a typical neuron, its Na- K ion exchange pump transports

The _________principle states that the size and speed of the action potential are independent of the stimulus strength.

Branches that may occur along an axon are called

Figure 11- 2 The Nerve Action Potential Use Figure 11- 2 to answer the following questions: -When is the neuron in the refractory period?

A drug that blocks ATP production is introduced into an isolated axon preparation. The axon is then repeatedly stimulated, and recordings are made of the response. What effects would you expect to observe?

If the permeability of a resting axon to sodium ion increases,

___________-monitor the internal environment

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

In the process of continuous action potential propagation,

Extensive damage to oligodendrocytes in the CNS could result in

Which of the following comparisons between neurons and muscle tissue is false?

The minimum stimulus required to trigger an action potential is known as the_____________

The equilibrium potential for potassium ion occurs at approximately

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 Skeleton

Articulations

Muscle Tissue

The Muscular System

The Spinal Cord, Spinal Nerves, and Spinal Reflexes

The Brain and Cranial Nerves

Neural Integration

The Special Senses

The Endocrine System

Blood

The Heart

Blood Vessels and Circulation

The Lymphoid System and Immunity

The Respiratory System

The Digestive System

Metabolism and Energetics

The Urinary System

Fluid, Electrolyte, and Acid-Base Balance

The Reproductive System

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$Figure 11- 2 The Nerve Action Potential Use Figure 11- 2 to answer the following questions: -When is the neuron in the refractory period?$ Figure 11- 2 The Nerve Action Potential Use Figure 11- 2 to answer the following questions: -When is the neuron in the refractory period?