Question 1

The general senses

Accepted Answer

A) involve receptors that are relatively simple in structure. 
B) are located in specialized structures called sense organs. 
C) are localized to specific areas of the body. 
D) cannot generate action potentials. 
E) include taste and smell. 
A) involve receptors that are relatively simple in structure. 
B) are located in specialized structures called sense organs. 
C) are localized to specific areas of the body. 
D) cannot generate action potentials. 
E) include taste and smell.

Question 2

The sense of proprioception passes along the ________ pathway.

Accepted Answer

A) rubriocerebellar 
B) corticospinal 
C) spinocerebellar 
D) decussation pathways 
E) ganglion 
A) rubriocerebellar 
B) corticospinal 
C) spinocerebellar 
D) decussation pathways 
E) ganglion

Question 3

Sensory information from all parts of the body is routed to

Accepted Answer

A) the prefrontal cortex. 
B) the cerebellum. 
C) the primary motor cortex. 
D) the somatosensory cortex. 
E) Broca's area. 
A) the prefrontal cortex. 
B) the cerebellum. 
C) the primary motor cortex. 
D) the somatosensory cortex. 
E) Broca's area.

Question 4

Tactile receptors composed of capsules that surround a core of collagen fibers intertwined with dendrites are called

Accepted Answer

A) Ruffini corpuscles. 
B) lamellated corpuscles. 
C) tactile (Meissner)corpuscles. 
D) tactile discs. 
E) root hair plexuses. 
A) Ruffini corpuscles. 
B) lamellated corpuscles. 
C) tactile (Meissner)corpuscles. 
D) tactile discs. 
E) root hair plexuses.

Question 5

Neurons from the fasciculus gracilis

Accepted Answer

A) relay information directly to the cerebrum. 
B) decussate before entering the medial lemniscus. 
C) relay sensory information to the ipsilateral cerebral hemisphere. 
D) carry both crude and fine touch. 
E) process proprioception. 
A) relay information directly to the cerebrum. 
B) decussate before entering the medial lemniscus. 
C) relay sensory information to the ipsilateral cerebral hemisphere. 
D) carry both crude and fine touch. 
E) process proprioception.

Question 6

Complex motor activities such as riding a bicycle

Accepted Answer

A) only require neural processing at the level of the cerebrum. 
B) involve little input from the brain,with practice. 
C) require the coordinated activity of several regions of the brain. 
D) are largely controlled at the level of the spinal cord. 
E) usually escape notice by the cerebellum. 
A) only require neural processing at the level of the cerebrum. 
B) involve little input from the brain,with practice. 
C) require the coordinated activity of several regions of the brain. 
D) are largely controlled at the level of the spinal cord. 
E) usually escape notice by the cerebellum.

Question 7

A ________ potential is a depolarization of a sensory dendrite that can lead to an afferent nerve impulse if strong enough.

Accepted Answer

A) resting 
B) refractory 
C) postsynaptic 
D) generator 
E) receptor 
A) resting 
B) refractory 
C) postsynaptic 
D) generator 
E) receptor

Question 8

A receptor potential may

Accepted Answer

A) increase neurotransmitter release. 
B) decrease neurotransmitter release. 
C) be a hyperpolarization. 
D) be a depolarization. 
E) All of the answers are correct. 
A) increase neurotransmitter release. 
B) decrease neurotransmitter release. 
C) be a hyperpolarization. 
D) be a depolarization. 
E) All of the answers are correct.

Question 9

The pyramids on the ventral surface of the medulla oblongata are formed by fibers of the ________ tracts.

Accepted Answer

A) corticospinal 
B) corticobulbar 
C) reticulospinal 
D) vestibulospinal 
E) tectospinal 
A) corticospinal 
B) corticobulbar 
C) reticulospinal 
D) vestibulospinal 
E) tectospinal

Question 10

The area of the motor cortex that is devoted to a particular region of the body is proportional to the

Accepted Answer

A) size of the body area. 
B) distance of the body area from the brain. 
C) number of motor units in that region. 
D) number of sensory receptors in the area of the body. 
E) size of the nerves that serve the area of the body. 
A) size of the body area. 
B) distance of the body area from the brain. 
C) number of motor units in that region. 
D) number of sensory receptors in the area of the body. 
E) size of the nerves that serve the area of the body.

Question 11

Axons of the corticobulbar tract terminate in the

Accepted Answer

A) sensory neurons. 
B) somatic motor neurons in the spinal cord. 
C) autonomic motor neurons in the spinal cord. 
D) motor nuclei of cranial nerves. 
E) nuclei in the thalamus. 
A) sensory neurons. 
B) somatic motor neurons in the spinal cord. 
C) autonomic motor neurons in the spinal cord. 
D) motor nuclei of cranial nerves. 
E) nuclei in the thalamus.

Question 12

Identify the type of information that travels along the structure labeled "2."

Accepted Answer

A) motor commands to skeletal muscles 
B) proprioception to the cerebral cortex 
C) fine touch to the cerebral cortex 
D) pressure and touch sensations 
E) visceral motor commands to smooth muscle 
A) motor commands to skeletal muscles 
B) proprioception to the cerebral cortex 
C) fine touch to the cerebral cortex 
D) pressure and touch sensations 
E) visceral motor commands to smooth muscle

Question 13

Damage to the pyramidal cells of the cerebral cortex would directly affect

Accepted Answer

A) perception of pain. 
B) sight. 
C) voluntary motor activity. 
D) hearing. 
E) balance. 
A) perception of pain. 
B) sight. 
C) voluntary motor activity. 
D) hearing. 
E) balance.

Question 14

Sensory transduction can involve which of the following?

Accepted Answer

A) a stimulus altering the permeability of a receptor membrane 
B) change in the flow of ions across the sensory membrane 
C) the production of a receptor potential 
D) inhibition of neurotransmitter release 
E) All of the answers are correct. 
A) a stimulus altering the permeability of a receptor membrane 
B) change in the flow of ions across the sensory membrane 
C) the production of a receptor potential 
D) inhibition of neurotransmitter release 
E) All of the answers are correct.

Question 15

Thermoreceptors

Accepted Answer

A) are found within the dermis. 
B) are free nerve endings. 
C) for "cold" are structurally indistinguishable from those for "warm." 
D) are more numerous for cold than for warm temperatures. 
E) All of the answers are correct. 
A) are found within the dermis. 
B) are free nerve endings. 
C) for "cold" are structurally indistinguishable from those for "warm." 
D) are more numerous for cold than for warm temperatures. 
E) All of the answers are correct.

Question 16

Which neuron delivers sensations to the CNS?

Accepted Answer

A) first-order 
B) second-order 
C) third-order 
D) fourth-order 
E) sensory receptor 
A) first-order 
B) second-order 
C) third-order 
D) fourth-order 
E) sensory receptor

Question 17

Figure 15-1 Spinothalamic Tracts
Use Figure 15-1 to answer the following questions:
-Which of the following is true regarding the structure labeled "6"?
1)The synapse occurs between motor neurons.
2)The sensations may be filtered out.
3)The third-order neuron projects to the primary sensory cortex.
4)The third-order neuron's axon is identified.

Accepted Answer

A) 1 and 4 
B) 2 only 
C) 3 only 
D) 3 and 4 
E) 1 and 3 
A) 1 and 4 
B) 2 only 
C) 3 only 
D) 3 and 4 
E) 1 and 3

Question 18

Thalamic neurons that project to the primary sensory cortex are ________ neurons.

Accepted Answer

A) receptor 
B) first-order 
C) second-order 
D) third-order 
E) fourth-order 
A) receptor 
B) first-order 
C) second-order 
D) third-order 
E) fourth-order

Question 19

The link between peripheral receptor and cortical neuron is called a(n)

Accepted Answer

A) efferent pathway. 
B) spinocortical line. 
C) sympathetic chain. 
D) adaptation pathway. 
E) labeled line. 
A) efferent pathway. 
B) spinocortical line. 
C) sympathetic chain. 
D) adaptation pathway. 
E) labeled line.

Question 20

The medial pathway that controls involuntary movements of head,neck,and arm position in response to sudden visual and auditory stimuli is the ________ tract.

Accepted Answer

A) lateral corticospinal 
B) tectospinal 
C) rubrospinal 
D) reticulospinal 
E) vestibulospinal 
A) lateral corticospinal 
B) tectospinal 
C) rubrospinal 
D) reticulospinal 
E) vestibulospinal

Exam 15: Sensory Pathways and the Somatic Nervous System

The general senses

The sense of proprioception passes along the ________ pathway.

Sensory information from all parts of the body is routed to

Tactile receptors composed of capsules that surround a core of collagen fibers intertwined with dendrites are called

Neurons from the fasciculus gracilis

Complex motor activities such as riding a bicycle

A ________ potential is a depolarization of a sensory dendrite that can lead to an afferent nerve impulse if strong enough.

A receptor potential may

The pyramids on the ventral surface of the medulla oblongata are formed by fibers of the ________ tracts.

The area of the motor cortex that is devoted to a particular region of the body is proportional to the

Axons of the corticobulbar tract terminate in the

Identify the type of information that travels along the structure labeled "2."

Damage to the pyramidal cells of the cerebral cortex would directly affect

Sensory transduction can involve which of the following?

Thermoreceptors

Which neuron delivers sensations to the CNS?

Thalamic neurons that project to the primary sensory cortex are ________ neurons.

The link between peripheral receptor and cortical neuron is called a(n)

The medial pathway that controls involuntary movements of head,neck,and arm position in response to sudden visual and auditory stimuli is the ________ tract.

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 Axial Skeleton

The Appendicular Skeleton

Joints

Muscle Tissue

The Muscular System

Neural Tissue

The Spinal Cord, spinal Nerves, and Spinal Reflexes

The Brain and Cranial Nerves

The Autonomic Nervous System and Higher-Order Functions

The Special Senses

The Endocrine System

Blood

The Heart

Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism and Energetics

The Urinary System

Fluid, electrolyte, and Acid-Base Balance

The Reproductive System

Development and Inheritance

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