Special senses

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created 9 years ago by Koconnor41
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1

The first order neuron from each special sense originates in the Peripheral Nervous System
True or False?

True! The first order neuron from each special sense originates in the Peripheral Nervous System

2

Name the five primary tastes:

Bitter
Sour
Sweet
Salty
Umami(meaty/savory)

3

Which muscle of the eye is innervated by Cranial Nerve VI?
Which way does this turn the eyeball?

The Lateral Rectus muscle is innervated by Cranial Nerve VI (Abducens).
It abducts the eyeball, turns it laterally.

4

Name the three layers of the eye(Tunics)

1. Fibrous Tunic
2. Vascular Tunic
3. Retina

5

What structures make up the external ear?
What is the external ear function?

Auricle, External Auditory Meatus, Tympanic membrane, Ceruminous glands(ear wax)
The external ear collects sound wave vibrations and channels them inward to the tympanic membrane.

6

Where is the the third order neuron for the sense of smell conducted?

This is tricky! There is no third order neuron in the sense of smell.
The olfaction sense BYPASSES the Thalamus and synapses in the Temporal Lobe -Cerebral Cortex.

7

Taste Buds are located where?

Tongue-most common area
Soft Palate
Pharynx
Epiglottis

8

Papilla is the major control center of the autonomic nervous system and endocrine system?
True or False?

False! Papilla are elevations of the tongue with sensory receptors embedded within.

PS> The Hypothalamus is the major control center of the ANS and endocrine system

9

Which Cranial Nerves innervate the superior oblique and inferior oblique muscles?

Cranial Nerve IV (trochlea) innervates the superior oblique
Cranial Nerve III (Oculomotor) innervates the inferior oblique

10

What is the Fibrous Tunic made up of?
1. Sclera & Cornea
2. Choroid & Iris
3. Neural tissue

The Fibrous Tunic is made up of
1. Sclera & Cornea

It is dense fibrous connective tissue

11

The Middle Ear is fluid filled.
True or False?

False. The middle ear is air filled

12

Where is the Primary Cortex area for Hearing?
1. Thalamus
2. Occipital lobe
3. Temporal lobe

The primary cortex for hearing is in the
Temporal lobe

13

The pupil of the eye constricts due to bright light and is under the parasympathetic system.
True or False?

True

14

Which Cranial Nerve innervates these muscles and which way does it turn?
Superior Rectus?
Inferior Rectus?
Medial Rectus?

Superor Rectus-Turns the eyeball up.
Inferior Rectus-Turns the eyeball down.
Medial Rectus-Turns the eyeball medially.
They are all innervated by Cranial Nerve III(oculomotor)

15

Taste buds of the tongue are photoreceptors?
True or False?

False! Taste buds are chemoreceptors. They require a liquid to stimulate the first order neuron.

16

Which Cranial Nerve supplies the first order neuron for the Anterior 2/3 of the tongue?

Cranial Nerve VII (facial nerve)

17

The lens of the eye is
1. Perfectly transparent
2. Made of connective tissue
3. Contains no blood vessels
4. Helps focus images on retina

All of these are correct!!

18

The internal ear is air filled.
True or false?

False. The Internal Ear is Fluid Filled, it houses receptors for hearing and equilibrium.

19

The first order neuron for hearing is generated by the
1. Facial nerve
2. Oculomotor nerve
3. Cochlear nerve

3. The cochlear nerve-of the vestibularcochlear nerve

20

Signals from the inner ear for equilibrium(balance and sense of motion) project mainly to the cerebellum.
True or False?

True. The Cerebellum is the Primary Cortex area for equilibrium.

21

Rods and Cones are photoreceptors for vision.
True or False?

True

22

Rods are:
1. Found mainly in the retina
2. Used for color vision
3. Vision in bright light
4. Total 6 million

Rods are:
1. Found mainly in the retina, none in the fovea centralis
-Have NO color vision
-Vision in DIM light
-Total only 120 million

23

Cones are:
1. Used for color vision
2. Vision in brighter light
3. Found mainly in the fovea centralis
4. Total 6 million

All are TRUE!

24

The first order neuron for Olfaction is found in the
1. Thalamus
2. Olfactory Tract
3. Olfactory Nerve

3. Olfactory nerve- located in the nasal cavity, the axon passes through the cribriform plate of the ethmoid bone

25

The first order neuron for Vision is found in the:
1. Optic Tract
2. Thalamus
3. Optic nerve
4. Fovea Centralis

3. Optic nerve

26

The first order neuron of taste for the posterior 1/3 of the tongue is supplied by the the:
1. Facial nerve
2. Abducens
3. Trigiminal
4. Glossopharyngeal

Glossopharyngeal- Cranial Nerve IX

27

The Vascular Tunic of the eyeball:
1. Is the middle layer
2. Comprised of the Choroid
3. Cilliary Body
4. Iris

These are all true.

28

All of the Special Senses neurons terminate in the Temporal Lobe
True or False?

False (mostly)- The neuron for VISION terminates in the Occipital Lobe.
All the rest terminate in the Temporal Lobe

29

The Retina is the beginning of visual pathway and is the third tunic of the eyeball.
True or False?

True-The retina has 2 layers
Outer pigmented layer
Inner neural layer= processes visual data and sends to the optic nerve
photoreceptors
bipolar cells
ganglion cells

30

The auditory/pharyngotympanic tube connects the nasopharynx to the middle ear and is responsible for equalizing pressure between atmosphere and middle ear.
True or False?

True