Exam 1 (Except Maxillary and Madibular Divison)

Question 1

What does the olfactory epithelium line with a thin layer of mucus

Answer 1

The superior nasal concha

Question 2

What do olfactory hairs function as

Answer 2

Receptors

Question 3

The central processes (axons) of 10-20 olfactory nerves convey info where

Answer 3

The olfactory bulbs

Question 4

T/F: OIfactory neuron axons are unmyelinated, but still covered by Schwann cells

Answer 4

True

Question 5

What are formed at the synapses of Olfactory n. axons and the dendrites of mitral cells

Answer 5

Synaptic glomeruli

Question 6

Are mitral cells covered by Schwann cells and myelin

Answer 6

Yes

Question 7

Where are the cell bodies of mitral cells located

Answer 7

In the olfactory bulb

Question 8

At the anterior perforated substance, what happens to mitral cell tract fibers

Answer 8

The split into medial and lateral olfactory striae

Question 9

What is the course of the Medial stria fibers

Answer 9

Cross the midline via ant. commissure and travel to the opposite olfactory bulb

Question 10

Where do Lateral stria fibers end up

Answer 10

Carry info to primary olfactory cortex on the medial aspect of the temporal lobe

Question 11

What makes up the Primary Olfactory Complex

Answer 11

Periamygdaloid and prepiriform area including the uncus (Bdmn. area 34)

Question 12

What is significant about olfactory and mitral fibers

Answer 12

The DO NOT pass through the Thalamus. They go directly to the cortex

Question 13

What does the outermost layer (Fibrous tunic) of the eye consist of

Answer 13

Sclera and Cornea

Question 14

What does the Middle layer (Vascular tunic) of the eye consist of

Answer 14

Ciliary Body, Iris, and Choroid

Question 15

How many layers does the innermost layer (retina) of the eye have

Answer 15

10 (PAGE 174)

Question 16

What are the 2 types of Photoreceptors

Answer 16

Rods and Cones

Question 17

What are the 3 types of cones

Answer 17

Red, Green, Blue

Question 18

Where are cones more concentrated

Answer 18

Toward the center of the retina (Fovea centralis is all cones)

Question 19

What is the MC color blindness

Answer 19

Red/Green

Question 20

Which gender is typically affected by colorblindness more

Answer 20

Males

Question 21

What do rods sense, and where are they more concentrated

Answer 21

Only light vs. dark. Periphery of retina is almost all rods

Question 22

Where are bipolar cell bodies found

Answer 22

Inner nuclear layer

Question 23

Where does the synapse btwn. Bipolar and Ganglion cells occur

Answer 23

Inner plexiform layer

Question 24

Where do axons from ganglion cells go to

Answer 24

The optic disc to be carried in the optic nerve

Question 25

Where do the optic nerves enter the skull

Answer 25

The optic canal. They unite to form the optic chiasma

Question 26

Are optic nerve axons myelinated

Answer 26

Yes

Question 27

What cells form the myelin for the optic nerve

Answer 27

Oligodendrocytes

Question 28

Why do oligodendrocytes form the myelin for the optic nerve

Answer 28

Because it is a CNS structure

Question 29

What happens to the medial and lateral fibers of the optic nerves within the optic chiasma

Answer 29

Medial will cross, lateral will not cross

Question 30

What 2 m. are influenced by the Tectospinal tract

Answer 30

SCM and Trapezius

Question 31

Where do a majority of fibers of the optic tract synapse

Answer 31

In the Lateral geniculate body, then relayed to Bdmn. area 17 in the occipital lobe

Question 32

Where do fibers that take info to tectospinal tract sypnapse (which nucleus)

Answer 32

Superior colliculus

Question 33

Where do the fibers that deal with light reflexes synapse (which nucleus)

Answer 33

Pretectal nucleus

Question 34

How many neurons are in the vision pathway

Answer 34

4

Question 35

What would a lesion in the optic nerve cause

Answer 35

Loss of vision in that eye

Question 36

What would a lesion in the decussating fibers of the optic chiasma

Answer 36

Tunnel vision

Question 37

What would a lesion of the optic tract cause

Answer 37

Loss of half of visual field

Question 38

How would you test the Afferent only component of Direct and consensual light reflexes

Answer 38

Pen/Flashlight

Question 39

How would you test the Afferent only component of the accommodation reflex

Answer 39

Changing shape of the lens (looking at something up close and far away)

Question 40

How would you test the Afferent only component of Corneal reflex

Answer 40

Blink and flinch (cotton ball to eye very lightly)

Question 41

How would you test the Afferent only component of Convergence

Answer 41

Look at a pen as draws nearer to face

Question 42

What n. supplies the levator palpebrae superioris

Answer 42

Oculomotor n.