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5. Outline the differences between a special sensory, motor and mixed cranial nerve, and briefly describe the functions of each sensory component of the cranial nerve.

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Deanna Hettinger
Deanna HettingerLv2
28 Sep 2019

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Related questions

Directions: In the following table, list all of the cranial nerves in order, using proper numbering and names. State what part of the CNS they emerge from (forebrain, midbrain, pons, or medulla). State whether each is sensory, motor, or both. Name their function. Use proper spelling.

Nerve #

Nerve Name

Emerges from:

Sens/Mot or Both

From rostral to caudal order, name the structures and junctions that make up the brainstem.

In the adult brain, which three of five brain vesicles form the brainstem?

What are the cerebellar peduncles and where are they located?

The cranial nerve nuclei for motor functions are located more ventrally in the brainstem, and those for sensory functions are located more dorsally. True or false? _______________

Where is the pyramidal decussation?

65. Where is bloodstream PCO2 monitored?

(a) lungs (b) aortic and carotid bodies (c) hypothalamus

66. Is PCO2 measured within the CNS?

(a) no (b) yes, within the brainstem (c) yes, within the hypothalamus

67. Is PO2 measured within the CNS?

(a) no (b) yes, within the brainstem (c) yes, throughout the brain

68. Glomus organs are innervated by sensory neurons. Are these sensory neurons stimulated byneurotransmitters released from Type I glomus cells?

yes or no

69. Does the structure of glomus organs enable direct sampling of arterial blood?

yes or no

70. Glomus organs are innervated by myelinated axons. Such axons are found within cranial nerve pairs IX andX (glossopharyngeal and vagus). Which type of glial cell myelinates axons within these nerve pairs?

(a) oligodendrocyte (b) fibrous astrocyte (c) Schwann cell

71. The sensory neuron axons that innervate glomus organs enter the CNS via the left and right solitary tracts. Where are the bodies of these sensory neurons?

(a) within the glomus organ (b) a ganglion at the base of each nerve (c) within the brainstem’s solitary nuclei

72. The term hypercapnia denotes elevated bloodstream PCO2. This condition induces acidemia, i.e. an arterialpH < 7.4. By convention, the underlying physiological reason (or process) is called acidosis. Consequently,acidemia can arise from either metabolic or respiratory acidosis. Ketogenesis and hypoventilation affordexamples of such processes. If arterial pH reaches 7.0, then CNS depression and coma follow. Acidemia iscountered by an autonomic reflex. Where does central integration occur for this reflex?

(a) sensory cortex (b) brainstem (c)hypothalamus

1) Interpretation of emotion isgoverned by the ___, and expression of emotion is governed by the___.

a. hippocampus, limbic system

b. limbic system, prefrontalcortex

c. hypothalamus,hippocampus

d. prefrontal cortex,amygdala

2) When a neurotransmitter opensa chemically gated ion channel that allows sodium to enter thepostsynaptic cell and depolarize it, the result is an:

A: EPSP

B: IPSP

3)

3) The portion of the nervous system that has voluntary controlover skeletal muscles is the ____ division.

a. autonomic motor

b. somatic sensory

c. somatic motor

d. visceral sensory

4) The cranial nerve responsible for movement ofthe medial rectus, superior rectus, inferior rectus, and inferioroblique muscles is the __________ nerve.

a. oculomotor

b. trochlear

c. abducens

d. trigeminal

5) The superior colliculi helpyou respond to:

a. somatic stimuli, for example,when you swat at a bug that has landed on your arm

b. visual stimuli, for example,when you turn toward a bright flash of light

c. internal stimuli from yourviscera, for example, when you feel abdominal pain

d. auditory stimuli, for example,when you turn toward a loud bang

6) Glial cells differ from neurons in thatthey:

a. transmit nerve impulses muchmore slowly

b. are found only in thePNS

c. are smaller and capable of mitosis

d. are larger and capable of mitosis

7) Association areas:

a. correlate similar functions from the same lobes on theopposite side of the brain

b. integrate new sensory inputs with memories of pastexperiences

c. correlate similar functions from different lobes on the sameside of the brain

d. correlate information from opposite sides of the brain

8) This is the site of protein synthesis in a neuron

a. Mitochondria

b. Nucleus

c. Nissl body

d. Golgi body

please please help me....... T_T

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