Chapter 13 - My L&M

Question 1

What two nerves do not arise from the brain stem?

Answer 1

Olfactory and optic

Question 2

The ______________ of the peripheral nervous sytems consists of lower motor neurons that directly innervate skeletal muscle fibers.

Answer 2

Somatic motor division

Question 3

What nerve is unique in that it has a spinal origin?

Answer 3

Accessory

Question 4

Which nerve innervates most of the intrinsic and extrinsic muscles of the tongue?

Answer 4

Hypoglossal

Question 5

Which cranial nerve originates as two separate nerves that share a common epineurium, but fuse together after they leave the temporal bone?

Answer 5

Vestibulocochlear

Question 6

Which is not a primary function of the oculomotor nerve (III)?

Answer 6

Dilates the pupil

Question 7

Where does the motor portion of the facial nerve (VII) originate?

Answer 7

Nuclei in the pons and medulla

Question 8

Which of the cranial nerves contain axons of motor neurons?

Answer 8

Trochlear

Question 9

Which division detects stimuli of the general senses and special senses?

Answer 9

Somatic sensory division

Question 10

Which cranial nerves are generally thought of as mixed?

Answer 10

Trigeminal, facial, glossopharyngeal, and vagus

Question 11

Which cranial nerves are generally thought of as sensory?

Answer 11

Olfactory, optic, and vestibulocochlear

Question 12

Which cranial nerves are generally thought of as motor?

Answer 12

Oculomotor, Trochlear, abducens, accessory, and hypoglossal

Question 13

Which nerve has the sensory functions of taste in the posterior one-third of the tongue and detecting changes in blood pressure of the carotid artery?

Answer 13

Glossopharangeal

Question 14

What connects the upper motor neurons to lower motor neurons?

Answer 14

Interneurons

Question 15

What connective tissue sheath wraps the axon of a neuron?

Answer 15

Endoneurium

Question 16

Bell’s palsy affects the __________ nerve.

Answer 16

Facial

Question 17

The ________ innervates the throat, anterior neck, and almost all of the thoracic and abdominal viscera.

Answer 17

Vagus

Question 18

Which somatic motor neuron innervates the lateral rectus muscle?

Answer 18

Abducens

Question 19

What is the connective tissue sheath that surrounds a peripheral nerve?

Answer 19

Epineurium

Question 20

What extraocular muscle does the trochlear nerve (IV) innervate?

Answer 20

Superior oblique muscle

Question 21

What nerve stimulates the masseter and temporalis muscles to elevate the mandible during mastication and swallowing?

Answer 21

Trigeminal

Question 22

What nerve causes the painful tingling sensation when you hit your “funny bone”?

Answer 22

Ulnar nerve

Question 23

Merkel cell fibers, tactile corpuscles, Ruffini endings, and lamellated corpuscles are all types of ______________.

Answer 23

Mechanoreceptors

Question 24

What sensors are located in the musculoskeletal system and detect the movement and position of a joint or body part?

Answer 24

Proprioceptors

Question 25

The _________ nerve is the largest nerve from the posterior division, and of the lumbar plexus.

Answer 25

Femoral

Question 26

____________ detect an object’s texture, temperature, and color.

Answer 26

Exteroceptors

Question 27

What receptors would detect a temperature of 52°C?

Answer 27

Nociceptors

Question 28

True or False: More sensory neurons equal smaller receptive fields per neuron.

Answer 28

True

Question 29

A network of nerves is known as a __________.

Answer 29

Plexus

Question 30

Visceral pain may be perceived as cutaneous pain, a phenomenon known as __________.

Answer 30

Referred pain

Question 31

Regions of skin supplied by a spinal nerve for somatic sensation are known as __________.

Answer 31

Dermatomes

Question 32

Sensory transduction occurs in __________.

Answer 32

PNS sensory neurons

Question 33

Which component of a somatic sensory neuron transmits an action potential from the peripheral process to the posterior horn?

Answer 33

Central process

Question 34

Which nerve innervates the deltoid and teres minor muscles and the skin over the deltoid?

Answer 34

Axillary nerve