Question 1

Cranial nerves may contain

Accepted Answer

A) sensory (afferent)neurons. 
B) motor (efferent)neurons. 
C) parasympathetic (efferent)neurons. 
D) any or all of these nerve cell types. 
A) sensory (afferent)neurons. 
B) motor (efferent)neurons. 
C) parasympathetic (efferent)neurons. 
D) any or all of these nerve cell types.

Question 2

Roger Romeo,always the confident and self-assured man-about-campus,is dismayed to find that every time he smells the perfume his first girlfriend wore,he gets tears in his eyes and a lump in his throat.What is the most likely physiological explanation for this involuntary response?

Accepted Answer

A) The frontal lobe controls motor activity,which is inhibited by smell. 
B) The substantia nigra secretes dopamine,which inhibits his corpus striatum,and causes emotional responses (i.e.,acting like a "dope"). 
C) The mammillary bodies in the hypothalamus produce strong reflexive physical and emotional responses to odors and memories. 
D) The temporal lobe evaluates auditory and olfactory input. 
E) The comparator function of the cerebellum compares old and new smells. 
A) The frontal lobe controls motor activity,which is inhibited by smell. 
B) The substantia nigra secretes dopamine,which inhibits his corpus striatum,and causes emotional responses (i.e.,acting like a "dope"). 
C) The mammillary bodies in the hypothalamus produce strong reflexive physical and emotional responses to odors and memories. 
D) The temporal lobe evaluates auditory and olfactory input. 
E) The comparator function of the cerebellum compares old and new smells.

Question 3

Following neurotransmitter activation of chemically gated channels,

Accepted Answer

A) the Na+ channels open for a brief time generating a local current. 
B) the cell may reach threshold. 
C) the inside of the membrane becomes more positive 
D) a local potential is generated 
E) All of the above are correct. 
A) the Na+ channels open for a brief time generating a local current. 
B) the cell may reach threshold. 
C) the inside of the membrane becomes more positive 
D) a local potential is generated 
E) All of the above are correct.

Question 4

Axons

Accepted Answer

A) may branch to form collateral axons. 
B) have an axon hillock which is devoid of nissl bodies. 
C) are often surrounded by a myelin sheath. 
D) carry action potentials away from the cell body. 
E) have all of these characteristics. 
A) may branch to form collateral axons. 
B) have an axon hillock which is devoid of nissl bodies. 
C) are often surrounded by a myelin sheath. 
D) carry action potentials away from the cell body. 
E) have all of these characteristics.

Question 5

The deep groove that separates the right and left cerebral hemispheres from each other is the

Accepted Answer

A) longitudinal fissure. 
B) lateral sulcus. 
C) lateral fissure. 
D) central sulcus. 
E) infundibulum. 
A) longitudinal fissure. 
B) lateral sulcus. 
C) lateral fissure. 
D) central sulcus. 
E) infundibulum.

Question 6

Why is it not normally possible for action potentials in the postsynaptic neuron to produce an action potential in the presynaptic neuron?

Accepted Answer

A) because the axon terminals of presynaptic neurons have no acetylcholine receptors 
B) because the presynaptic neurons do not have a resting membrane potential 
C) because the synaptic cleft allows the diffusion of acetylcholine in one direction only 
D) because the synaptic vesicles in the postsynaptic terminal are inactive 
E) both because the presynaptic neurons do not have a resting membrane potential and because the synaptic cleft allows the diffusion of acetylcholine in one direction only 
A) because the axon terminals of presynaptic neurons have no acetylcholine receptors 
B) because the presynaptic neurons do not have a resting membrane potential 
C) because the synaptic cleft allows the diffusion of acetylcholine in one direction only 
D) because the synaptic vesicles in the postsynaptic terminal are inactive 
E) both because the presynaptic neurons do not have a resting membrane potential and because the synaptic cleft allows the diffusion of acetylcholine in one direction only

Question 7

When a doctor gives a patient epidural anesthesia,they are inserting a needle between which two structures?

Accepted Answer

A) pia mater and arachnoid mater 
B) body of the vertebrae and dura mater 
C) spinal cord and arachnoid mater 
D) periosteum and dura mater 
E) dorsal root ganglion and the transverse process 
A) pia mater and arachnoid mater 
B) body of the vertebrae and dura mater 
C) spinal cord and arachnoid mater 
D) periosteum and dura mater 
E) dorsal root ganglion and the transverse process

Question 8

The _________ is the efferent subdivision that transmits impulses from CNS to smooth muscle,cardiac muscle,and glands through thoracic spinal nerves.

Accepted Answer

A) central nervous system 
B) somatic nervous system 
C) sympathetic division of the autonomic nervous system 
D) parasympathetic division of the autonomic nervous system 
E) afferent division of the peripheral nervous system 
A) central nervous system 
B) somatic nervous system 
C) sympathetic division of the autonomic nervous system 
D) parasympathetic division of the autonomic nervous system 
E) afferent division of the peripheral nervous system

Question 9

-The letter C represents what structure on this figure of a neuron?

Accepted Answer

A) dendrite 
B) axon 
C) axon hillock 
D) Node of Ranvier 
E) Schwann cell 
A) dendrite 
B) axon 
C) axon hillock 
D) Node of Ranvier 
E) Schwann cell

Question 10

Below are given the steps of the patellar reflex arc.What is the correct order of events from the time the hammer taps the patellar ligament to the knee jerk response? 1)The leg extends at the knee.
2)Sensory neurons conduct the action potentials to the spinal cord.
3)Motor neurons are stimulated and generate an action potential.
4)Sensory neurons synapse with motor neurons in the spinal cord.
5)The AP travels to the quadriceps femoris and cause it to contract.
6)Sensory receptors in the muscle detect the stretch of the tendon and muscles.

Accepted Answer

A) 3,4,6,2,5,1 
B) 6,2,4,3,5,1 
C) 5,3,6,2,4,1 
D) 6,5,4,2,3,1 
E) 1,5,3,4,2,6 
A) 3,4,6,2,5,1 
B) 6,2,4,3,5,1 
C) 5,3,6,2,4,1 
D) 6,5,4,2,3,1 
E) 1,5,3,4,2,6

Question 11

The corpus callosum

Accepted Answer

A) consists of a broad band of white tracts. 
B) is found at the base of the longitudinal fissure. 
C) is the largest of the commissures. 
D) allows sensory information to be shared between the two cerebral hemispheres. 
E) has all of these characteristics. 
A) consists of a broad band of white tracts. 
B) is found at the base of the longitudinal fissure. 
C) is the largest of the commissures. 
D) allows sensory information to be shared between the two cerebral hemispheres. 
E) has all of these characteristics.

Question 12

Which of the following is not TRUE of K+ leak channels?

Accepted Answer

A) are always open. 
B) are 50 - 100 times more prevalent than Na+ leak channels. 
C) have the greatest contribution to the resting potential of the cell. 
D) are responsible for the depolarization phase of the action potential. 
E) allow K+ ions to "leak" down their concentration gradient and out of the cell. 
A) are always open. 
B) are 50 - 100 times more prevalent than Na+ leak channels. 
C) have the greatest contribution to the resting potential of the cell. 
D) are responsible for the depolarization phase of the action potential. 
E) allow K+ ions to "leak" down their concentration gradient and out of the cell.

Question 13

The resting membrane potential

Accepted Answer

A) occurs because the cell membrane is more permeable to potassium ions than sodium ions. 
B) partly results from the sodium-potassium exchange pump. 
C) occurs because the cell membrane remains polarized at rest. 
D) occurs because there are negatively charged proteins and ions inside the cell. 
E) has all of these contributing factors. 
A) occurs because the cell membrane is more permeable to potassium ions than sodium ions. 
B) partly results from the sodium-potassium exchange pump. 
C) occurs because the cell membrane remains polarized at rest. 
D) occurs because there are negatively charged proteins and ions inside the cell. 
E) has all of these contributing factors.

Question 14

Local potentials

Accepted Answer

A) are propagated down the length of the axon 
B) if strong enough,activate voltage gated channels to initiate and action potential. 
C) are another name for action potentials 
D) are produced by the brief influx of K+ from the neuron 
E) are produced by the brief efflux of Na+ from the neuron 
A) are propagated down the length of the axon 
B) if strong enough,activate voltage gated channels to initiate and action potential. 
C) are another name for action potentials 
D) are produced by the brief influx of K+ from the neuron 
E) are produced by the brief efflux of Na+ from the neuron

Cranial nerves may contain

Roger Romeo,always the confident and self-assured man-about-campus,is dismayed to find that every time he smells the perfume his first girlfriend wore,he gets tears in his eyes and a lump in his throat.What is the most likely physiological explanation for this involuntary response?

Following neurotransmitter activation of chemically gated channels,

Axons

The deep groove that separates the right and left cerebral hemispheres from each other is the

Why is it not normally possible for action potentials in the postsynaptic neuron to produce an action potential in the presynaptic neuron?

When a doctor gives a patient epidural anesthesia,they are inserting a needle between which two structures?

The _________ is the efferent subdivision that transmits impulses from CNS to smooth muscle,cardiac muscle,and glands through thoracic spinal nerves.

-The letter C represents what structure on this figure of a neuron?

The corpus callosum

Which of the following is not TRUE of K⁺ leak channels?

The resting membrane potential

Local potentials

The Human Organism

The Chemical Basis of Life

Cell Structures and Their Functions

Tissues

Integumentary System

Skeletal System: Bones and Joints

Muscular System

Senses

Endocrine System

Blood

Heart

Blood Vessels and Circulation

The Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition, metabolism, and Body Temperature Regulation

Urinary System and Fluid Balance

Reproductive System

Development, heredity, and Aging

Filters

Exam 8: Nervous System

Cranial nerves may contain

Roger Romeo,always the confident and self-assured man-about-campus,is dismayed to find that every time he smells the perfume his first girlfriend wore,he gets tears in his eyes and a lump in his throat.What is the most likely physiological explanation for this involuntary response?

Following neurotransmitter activation of chemically gated channels,

Axons

The deep groove that separates the right and left cerebral hemispheres from each other is the

Why is it not normally possible for action potentials in the postsynaptic neuron to produce an action potential in the presynaptic neuron?

When a doctor gives a patient epidural anesthesia,they are inserting a needle between which two structures?

The _________ is the efferent subdivision that transmits impulses from CNS to smooth muscle,cardiac muscle,and glands through thoracic spinal nerves.

-The letter C represents what structure on this figure of a neuron?

The corpus callosum

Which of the following is not TRUE of K+ leak channels?

The resting membrane potential

Local potentials

The Human Organism

The Chemical Basis of Life

Cell Structures and Their Functions

Tissues

Integumentary System

Skeletal System: Bones and Joints

Muscular System

Senses

Endocrine System

Blood

Heart

Blood Vessels and Circulation

The Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition, metabolism, and Body Temperature Regulation

Urinary System and Fluid Balance

Reproductive System

Development, heredity, and Aging

Filters

Which of the following is not TRUE of K⁺ leak channels?