Question 1

Receptor molecules

Accepted Answer

A) are nonspecific. 
B) are always lipids. 
C) attach to the synaptic cleft. 
D) determine whether a neurotransmitter will be excitatory or inhibitory. 
E) are not attached to ligand-gated channels. 
A) are nonspecific. 
B) are always lipids. 
C) attach to the synaptic cleft. 
D) determine whether a neurotransmitter will be excitatory or inhibitory. 
E) are not attached to ligand-gated channels.

Question 2

Dendrites

Accepted Answer

A) are the input part of the neuron. 
B) conduct action potentials away from the cell body. 
C) are generally long and unbranched. 
D) form synapses with the microglia. 
E) contain the trigger zone. 
A) are the input part of the neuron. 
B) conduct action potentials away from the cell body. 
C) are generally long and unbranched. 
D) form synapses with the microglia. 
E) contain the trigger zone.

Question 3

-The figure is a process figure of the chemical synapse.What does "C" 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 4

-Identify structure "E" 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 5

Match the following concerning concentration differences across the plasma membrane.
-higher outside 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 6

Which of the following is NOT true about astrocytes?

Accepted Answer

A) They can wall off an injury site to prevent spread of inflammation. 
B) They can prevent toxic substances from entering brain tissue. 
C) They can release chemicals that promote formation of synapses. 
D) They can aid in the regeneration of injured neurons. 
A) They can wall off an injury site to prevent spread of inflammation. 
B) They can prevent toxic substances from entering brain tissue. 
C) They can release chemicals that promote formation of synapses. 
D) They can aid in the regeneration of injured neurons.

Question 7

Match the term with the correct definition.
-depolarization

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 8

Which of the following events is NOT a characteristic of an action potential?

Accepted Answer

A) The plasma membrane becomes highly permeable to sodium ions and depolarization results. 
B) As sodium ions enter,the inside of the plasma membrane becomes more negative. 
C) At the peak of depolarization,sodium channels begin to close and potassium channels open. 
D) In repolarization,potassium ions flow out of the cell. 
E) Action potentials occur according to the all-or-none principle. 
A) The plasma membrane becomes highly permeable to sodium ions and depolarization results. 
B) As sodium ions enter,the inside of the plasma membrane becomes more negative. 
C) At the peak of depolarization,sodium channels begin to close and potassium channels open. 
D) In repolarization,potassium ions flow out of the cell. 
E) Action potentials occur according to the all-or-none principle.

Question 9

Match the term with the correct definition.
-Local 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 10

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 11

When a neurotransmitter binds to its receptor and increases the permeability of the postsynaptic membrane to sodium ions,

Accepted Answer

A) the membrane will be hyperpolarized. 
B) more chloride ions will also diffuse into the cell. 
C) an excitatory postsynaptic potential (EPSP)will result. 
D) the membrane will become impermeable to potassium ions. 
E) the sodium ions diffuse out of the cell. 
A) the membrane will be hyperpolarized. 
B) more chloride ions will also diffuse into the cell. 
C) an excitatory postsynaptic potential (EPSP)will result. 
D) the membrane will become impermeable to potassium ions. 
E) the sodium ions diffuse out of the cell.

Question 12

What ion is necessary for the release of neurotransmitter from synaptic vesicles?

Accepted Answer

A) chloride 
B) sodium 
C) potassium 
D) calcium 
A) chloride 
B) sodium 
C) potassium 
D) calcium

Question 13

Neurons arranged in a circular pathway form

Accepted Answer

A) neuromotor junctions. 
B) temporal circuits. 
C) reverberating circuits. 
D) spatial pathways. 
A) neuromotor junctions. 
B) temporal circuits. 
C) reverberating circuits. 
D) spatial pathways.

Question 14

When repolarization of a neuron is complete,the

Accepted Answer

A) neuron dies. 
B) neuron regenerates. 
C) cell no longer has a potential difference across its membrane. 
D) original polarity of the neuron is restored. 
E) neuron is no longer excitable. 
A) neuron dies. 
B) neuron regenerates. 
C) cell no longer has a potential difference across its membrane. 
D) original polarity of the neuron is restored. 
E) neuron is no longer excitable.

Question 15

If five action potentials arrive at the same synapse in very close succession,which of the following would occur?

Accepted Answer

A) The direction of the action potential is reversed. 
B) Temporal summation occurs. 
C) Spatial summation occurs. 
D) Hyperpolarization occurs. 
E) Depolarization always occurs. 
A) The direction of the action potential is reversed. 
B) Temporal summation occurs. 
C) Spatial summation occurs. 
D) Hyperpolarization occurs. 
E) Depolarization always occurs.

Exam 11: Functional Organization of Nervous Tissue

Receptor molecules

Dendrites

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

-Identify structure "E" on the neuron.

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

Which of the following is NOT true about astrocytes?

Match the term with the correct definition. -depolarization

Which of the following events is NOT a characteristic of an action potential?

Match the term with the correct definition. -Local Potential

Synaptic vesicles contain neurotransmitters and are present in the

When a neurotransmitter binds to its receptor and increases the permeability of the postsynaptic membrane to sodium ions,

What ion is necessary for the release of neurotransmitter from synaptic vesicles?

Neurons arranged in a circular pathway form

When repolarization of a neuron is complete,the

If five action potentials arrive at the same synapse in very close succession,which of the following would occur?

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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