Deck 19: Orofacial Reflexes

Question 1

What term is used to describe a predictable response to a sensory stimulus?

Answer 1

Reflex

Question 2

What term is used to describe an aggregation of neurons that act as an interneuron to coordinate complex reactions to a stimulus?

Answer 2

Reflex center

Question 3

Which two cranial nerves are involved in the gag reflex?

Answer 3

Glossopharyngeal (IX) and vagus (X)

Question 4

What type of reflex occurs when the central processes of a sensory neuron synapse directly on the motor neuron?

Question 5

Damage to the glossopharyngeal nerve could result in loss of the gag reflex.

Question 6

An involuntary response to an outside stimulus reaches the brain via the corticospinal tract.

Question 7

In the blink-to-light reflex, intense light stimulates receptors in the cornea.

Question 8

A voluntary response to move away from an unpleasant stimulus arises from the cerebrum and is transferred to motor neurons in the spinal cord via the ____________________.

Question 9

The pathway through which a stimulus must travel to invoke a response is known as a ____________________.

Question 10

In the sensory limb of a reflex arc, the stimulus is received by a ____________________, and the impulse is then carried to the central nervous system by a sensory neuron.

Question 11

In the motor limb of a reflex arc, an impulse is transmitted from the motor neuron via spinal or cranial nerves to an ____________________.

Question 12

During a ____________________ reflex, the sensory neuron may synapse on multiple interneurons prior to synapse with the motor neuron.

Question 13

Which of the following functions as an interneuron for the blink-to-light reflex?

A) Spinal nucleus of V
B) Superior colliculus
C) Nucleus ambiguus
D) Oculomotor nucleus
E) Facial nucleus

Question 14

Which of the following is the effector for the blink reflex?

A) Levator palpebrae superioris muscle
B) Facial nerve
C) Oculomotor nerve
D) Orbicularis oculi muscle
E) Pupillary muscle

Question 15

Which nucleus is a component of the motor limb of the cough reflex?

A) Superior colliculus
B) Spinal nucleus of V
C) Nucleus ambiguus
D) Facial nucleus
E) Superior salivatory nucleus

Question 16

What is the location of the motor neurons in the blink-to-light reflex?

A) Superior colliculus
B) Spinal nucleus of V
C) Nucleus ambiguus
D) Facial nucleus
E) Superior salivatory nucleus

Question 17

The receptors for the gag reflex are located on the

A) body of the tongue.
B) cheek wall.
C) anterior tonsillar pillars.
D) rugae of the hard palate.
E) posterior one-third of the tongue.

Question 18

What nerve is a component of the corneal reflex to touch?

A) Optic nerve
B) Oculomotor nerve
C) Maxillary nerve
D) Ophthalmic nerve
E) Facial nerve

Question 19

During a routine examination of a patient's oral cavity, you notice the oropharynx is insensitive to touch, and the gag reflex is impaired. Which of the following cranial nerves is most likely affected?

A) Hypoglossal
B) Vagus
C) Mandibular nerve (V₃)
D) Facial
E) Glossopharyngeal

Question 20

Which of the following are components of the efferent limb of a reflex? (Select all that apply.)

A) Receptor
B) Sensory nerve
C) Motor nucleus
D) Interneuron
E) Effector

Question 21

Which of the following are components of the afferent limb of a reflex? (Select all that apply.)

A) Receptor
B) Sensory nerve
C) Motor nucleus
D) Interneuron
E) Effector

Question 22

Motor neurons for which of the following reflexes are located in the facial nucleus? (Select all that apply.)

A) Blink-to-light
B) Tearing
C) Cough
D) Blink-to-touch
E) Gag

Question 23

Match the structures with their correct functions. An answer may be used once, more than once, or not at all. Multiple answers may apply.

-Superior salivatory nucleus

A) Afferent limb of cough reflex
B) Effector for gag reflex
C) Afferent limb of blink-to-light reflex
D) Effector for blinking reflexes
E) Motor limb of tear reflex
F) Afferent limb of touch-to-blink reflex

Question 24

Match the structures with their correct functions. An answer may be used once, more than once, or not at all. Multiple answers may apply.

-Retina

A) Afferent limb of cough reflex
B) Effector for gag reflex
C) Afferent limb of blink-to-light reflex
D) Effector for blinking reflexes
E) Motor limb of tear reflex
F) Afferent limb of touch-to-blink reflex

Question 25

Match the structures with their correct functions. An answer may be used once, more than once, or not at all. Multiple answers may apply.

-Pharyngeal constrictors

A) Afferent limb of cough reflex
B) Effector for gag reflex
C) Afferent limb of blink-to-light reflex
D) Effector for blinking reflexes
E) Motor limb of tear reflex
F) Afferent limb of touch-to-blink reflex

Question 26

Match the structures with their correct functions. An answer may be used once, more than once, or not at all. Multiple answers may apply.

-Orbicularis oculi

A) Afferent limb of cough reflex
B) Effector for gag reflex
C) Afferent limb of blink-to-light reflex
D) Effector for blinking reflexes
E) Motor limb of tear reflex
F) Afferent limb of touch-to-blink reflex

Question 27

Match the structures with their correct functions. An answer may be used once, more than once, or not at all. Multiple answers may apply.

-Superior laryngeal nerve

A) Afferent limb of cough reflex
B) Effector for gag reflex
C) Afferent limb of blink-to-light reflex
D) Effector for blinking reflexes
E) Motor limb of tear reflex
F) Afferent limb of touch-to-blink reflex

Question 28

Match the structures with their correct functions. An answer may be used once, more than once, or not at all. Multiple answers may apply.

-Cornea

A) Afferent limb of cough reflex
B) Effector for gag reflex
C) Afferent limb of blink-to-light reflex
D) Effector for blinking reflexes
E) Motor limb of tear reflex
F) Afferent limb of touch-to-blink reflex

Question 29

Match the structures with their correct locations. Answers may be used only once.

-Second synapse in the cough reflex

A) Superior colliculus
B) Spinal nucleus of V
C) Superior salivatory nucleus
D) Nucleus ambiguus
E) Facial nucleus

Question 30

Match the structures with their correct locations. Answers may be used only once.

-First synapse in the blink-to-light reflex

A) Superior colliculus
B) Spinal nucleus of V
C) Superior salivatory nucleus
D) Nucleus ambiguus
E) Facial nucleus

Question 31

Match the structures with their correct locations. Answers may be used only once.

-Second synapse in the tearing reflex

A) Superior colliculus
B) Spinal nucleus of V
C) Superior salivatory nucleus
D) Nucleus ambiguus
E) Facial nucleus

Question 32

Match the structures with their correct locations. Answers may be used only once.

-Second synapse in the blink-to-touch reflex

A) Superior colliculus
B) Spinal nucleus of V
C) Superior salivatory nucleus
D) Nucleus ambiguus
E) Facial nucleus

Question 33

Match the structures with their correct locations. Answers may be used only once.

-First synapse in the tearing reflex

A) Superior colliculus
B) Spinal nucleus of V
C) Superior salivatory nucleus
D) Nucleus ambiguus
E) Facial nucleus