Question 1

When multiple presynaptic neurons release neurotransmitter at various locations onto the postsynaptic neuron at the same time,this results in

Accepted Answer

A) suprathreshold hyperpolarization. 
B) temporal summation. 
C) spatial summation. 
D) several action potentials. 
A) suprathreshold hyperpolarization. 
B) temporal summation. 
C) spatial summation. 
D) several action potentials.

Question 2

The glial cell that defends the body against pathogens is the

Accepted Answer

A) astrocyte. 
B) ependymal cell. 
C) neurolemmocyte. 
D) microglial cell. 
E) oligodendrocyte. 
A) astrocyte. 
B) ependymal cell. 
C) neurolemmocyte. 
D) microglial cell. 
E) oligodendrocyte.

Question 3

Where are synaptic knobs located

Accepted Answer

A) At the tips of telodendria 
B) At the ends of dendrites 
C) Within the cell body 
D) Along axon collaterals 
E) At the axon hillock 
A) At the tips of telodendria 
B) At the ends of dendrites 
C) Within the cell body 
D) Along axon collaterals 
E) At the axon hillock

Question 4

The connective tissue wrapping that surrounds bundles (fascicles)of axons is the

Accepted Answer

A) epineurium. 
B) endoneurium. 
C) perineurium. 
D) endosteum. 
E) periosteum. 
A) epineurium. 
B) endoneurium. 
C) perineurium. 
D) endosteum. 
E) periosteum.

Question 5

Typically,the resting membrane potential of a neuron is

Accepted Answer

A) 7 V. 
B) 700 mV. 
C) -7 V. 
D) -70 mV. 
E) 0 mV. 
A) 7 V. 
B) 700 mV. 
C) -7 V. 
D) -70 mV. 
E) 0 mV.

Question 6

The portion of the nervous system that has voluntary control over skeletal muscles is the _____________ division.

Accepted Answer

A) autonomic motor 
B) somatic sensory 
C) somatic motor 
D) visceral sensory 
A) autonomic motor 
B) somatic sensory 
C) somatic motor 
D) visceral sensory

Question 7

Conductive activity in a neuron generally causes it to secrete

Accepted Answer

A) a specific neurotransmitter that either excites or inhibits its target. 
B) a specific neurotransmitter that always excites its target. 
C) several types of neurotransmitters simultaneously,all of which excite the cell's target. 
D) several types of neurotransmitters simultaneously,that are broadcast to excite and inhibit multiple targets. 
E) several types of neurotransmitters simultaneously,that all work to prevent another immediate impulse. 
A) a specific neurotransmitter that either excites or inhibits its target. 
B) a specific neurotransmitter that always excites its target. 
C) several types of neurotransmitters simultaneously,all of which excite the cell's target. 
D) several types of neurotransmitters simultaneously,that are broadcast to excite and inhibit multiple targets. 
E) several types of neurotransmitters simultaneously,that all work to prevent another immediate impulse.

Question 8

Based on structure,the most common type of neuron is the _______ neuron.

Accepted Answer

A) multipolar 
B) bipolar 
C) unipolar 
D) pseudounipolar 
A) multipolar 
B) bipolar 
C) unipolar 
D) pseudounipolar

Question 9

Which statement is true regarding the action of an oligodendrocyte

Accepted Answer

A) Each oligodendrocyte can form a myelin sheath around many axons simultaneously. 
B) An oligodendrocyte is responsible for forming part of the blood-brain barrier. 
C) Oligodendrocytes function only within the PNS. 
D) Each oligodendrocyte can wrap only a 1-mm portion of a single axon. 
E) A neurolemmocyte attacks pathogens. 
A) Each oligodendrocyte can form a myelin sheath around many axons simultaneously. 
B) An oligodendrocyte is responsible for forming part of the blood-brain barrier. 
C) Oligodendrocytes function only within the PNS. 
D) Each oligodendrocyte can wrap only a 1-mm portion of a single axon. 
E) A neurolemmocyte attacks pathogens.

Question 10

Graded potenials generally occur only on the axon of a neuron.

Accepted Answer

A) True 
 B)False

Question 11

Potassium has a higher concentration

Accepted Answer

A) inside the cell versus outside the cell,and sodium is also more concentrated inside versus outside the cell. 
B) inside the cell versus outside the cell,whereas sodium has a higher concentration outside versus inside the cell. 
C) outside the cell versus inside the cell,and sodium is also more concentrated outside versus inside the cell. 
D) outside the cell versus inside the cell,whereas sodium has a higher concentration inside versus outside the cell. 
A) inside the cell versus outside the cell,and sodium is also more concentrated inside versus outside the cell. 
B) inside the cell versus outside the cell,whereas sodium has a higher concentration outside versus inside the cell. 
C) outside the cell versus inside the cell,and sodium is also more concentrated outside versus inside the cell. 
D) outside the cell versus inside the cell,whereas sodium has a higher concentration inside versus outside the cell.

Question 12

Endocannabinoids are neuromodulators that decrease neurotransmitter release from presynaptic neurons.

Accepted Answer

A) True 
 B)False

Question 13

Most commonly,a synapse is made between a

Accepted Answer

A) presynaptic neuron's dendrite and a postsynaptic membrane's cell body. 
B) presynaptic neuron's axon and a postsynaptic neuron's dendrite. 
C) presynaptic neuron's axon hillock and a postsynaptic neuron's cell body. 
D) presynaptic neuron's soma and a postsynaptic neuron's synaptic knob. 
A) presynaptic neuron's dendrite and a postsynaptic membrane's cell body. 
B) presynaptic neuron's axon and a postsynaptic neuron's dendrite. 
C) presynaptic neuron's axon hillock and a postsynaptic neuron's cell body. 
D) presynaptic neuron's soma and a postsynaptic neuron's synaptic knob.

Question 14

Action potentials are generated by the opening of ________ gated channels and they occur on the ________.

Accepted Answer

A) voltage-,axon 
B) voltage-,dendrite 
C) chemically,axon 
D) chemically,dendrite 
A) voltage-,axon 
B) voltage-,dendrite 
C) chemically,axon 
D) chemically,dendrite

Question 15

What is the most abundant glial cell in the CNS

Accepted Answer

A) Astrocyte 
B) Ependymal cell 
C) Neurolemmocyte 
D) Microglial cell 
E) Oligodendrocyte 
A) Astrocyte 
B) Ependymal cell 
C) Neurolemmocyte 
D) Microglial cell 
E) Oligodendrocyte

Question 16

The conductive segment of a neuron is its _______,a region that contains many _______ gated channels.

Accepted Answer

A) axon,voltage- 
B) axon,chemically 
C) dendrite,voltage- 
D) dendrite,chemically 
A) axon,voltage- 
B) axon,chemically 
C) dendrite,voltage- 
D) dendrite,chemically

Question 17

What structures extend into the axon and dendrite of a neuron to provide tensile strength

Accepted Answer

A) Motor filaments 
B) Nissl bodies 
C) Telodendria 
D) Neurofibrils 
E) Collateral fibers 
A) Motor filaments 
B) Nissl bodies 
C) Telodendria 
D) Neurofibrils 
E) Collateral fibers

Question 18

In order to trigger the release of neurotransmitter from a neuron terminal,calcium ions

Accepted Answer

A) exit the synaptic knob through diffusion. 
B) bind to proteins on the surface of synaptic vesicles. 
C) penetrate the synaptic vesicles and bind to molecules of neurotransmitter. 
D) bind to ion channels on the neuron membrane and cause them to open for the transmitter. 
A) exit the synaptic knob through diffusion. 
B) bind to proteins on the surface of synaptic vesicles. 
C) penetrate the synaptic vesicles and bind to molecules of neurotransmitter. 
D) bind to ion channels on the neuron membrane and cause them to open for the transmitter.

Exam 12: Nervous System: Nervous Tissue

When multiple presynaptic neurons release neurotransmitter at various locations onto the postsynaptic neuron at the same time,this results in

The glial cell that defends the body against pathogens is the

Where are synaptic knobs located

The connective tissue wrapping that surrounds bundles (fascicles)of axons is the

Typically,the resting membrane potential of a neuron is

The portion of the nervous system that has voluntary control over skeletal muscles is the _____________ division.

Conductive activity in a neuron generally causes it to secrete

Based on structure,the most common type of neuron is the _______ neuron.

Which statement is true regarding the action of an oligodendrocyte

Graded potenials generally occur only on the axon of a neuron.

Potassium has a higher concentration

Endocannabinoids are neuromodulators that decrease neurotransmitter release from presynaptic neurons.

Most commonly,a synapse is made between a

Action potentials are generated by the opening of ________ gated channels and they occur on the ________.

What is the most abundant glial cell in the CNS

The conductive segment of a neuron is its _______,a region that contains many _______ gated channels.

What structures extend into the axon and dendrite of a neuron to provide tensile strength

In order to trigger the release of neurotransmitter from a neuron terminal,calcium ions

The Sciences of Anatomy and Physiology

Atoms,Ions,and Molecules

Energy,Chemical Reactions,and Cellular Respiration

Biology of the Cell

Tissue Organization

Integumentary System

Skeletal System: Bone Structure and Function

Skeletal System: Axial and Appendicular Skeleton

Skeletal System: Articulations

Muscle Tissue

Muscular System: Axial and Appendicular Muscles

Nervous System: Brain and Cranial Nerves

Nervous System: Spinal Cord and Spinal Nerves

Nervous System: Autonomic Nervous System

Nervous System: Senses

Endocrine System

Cardiovascular System: Blood

Cardiovascular System: Heart

Cardiovascular System: Vessels and Circulation

Lymphatic System

Immune System and the Bodys Defense

Respiratory System

Urinary System

Fluid and Electrolytes

Digestive System

Nutrition and Metabolism

Reproductive System

Development,Pregnancy,and Heredity

Filters

Action potentials are generated by the opening of gated channels and they occur on the .

The conductive segment of a neuron is its _,a region that contains many _ gated channels.