Exam 3 - Sensory Nerve System

This layer consists of the choroid, ciliary body and iris and contains blood vessels:

vascular tunic

These neurons are the middle layer of cells of the retina:

Bipolar cells

Match the structure with its correct function.

Both a and d above

This cranial nerve carries smell information to the brain:

CN 1

The snail like structure in the inner ear that contains fluid and the receptor organ for hearing is the:

Cochlea

This portion of the inner ear is involved in hearing:

Cochlea

Thermoreceptors are more inclined to detect actual temperature than a temperature change. Which is why slightly warm water, feels really hot, if your hands were just sitting in ice water. True, or false?

False

Think about your tongue at this exact moment. You can feel where it's positioned in your mouth and how it "feels". This is an example of a:

General sense

Hair cells within the Organ of Corti of the Cochlea are classified as:

Mechanoreceptors

The receptors for smell are also known as:

Olfactory receptor cells

The receptor organ for hearing, found in the cochlea, is known as the:

Organ of Corti

This structure functions to capture the sound waves and deliver them to the external auditory canal:

Pinna

These are both found in the outer ear:

Pinna and External auditory canal

Loss of elasticity of the lens, which results in a loss of ability to see up close, is known as:

Presbyopia

From the external auditory canal, sound wave vibrations are next conducted to the:

Tympanic membrane

Linear movements of the head, as occurs when we walk forward or when we tilt our heads down, is detected by receptors in this region of the inner ear:

Vestibule

These portions of the inner ear are involved in balance (equilibrium):

Vestibule and Semicircular canals

This cranial nerve carries balance information from the inner ear to the brain:

Vestibulocochlear

The cranial nerve that carries the sound information to the brain is the:

Vestibulocochlear nerve

According to the reading, the choroid is darkly pigmented to absorb excess light. In our human eyes the choroid appears _____. It is _____ when light is shined upon it, and so you get "red eye" when you use a flash in pictures.

black, red

Partial crossover of the visual neural pathway is responsible for _____ since each eye gives you a slightly different perspective shared between both visual centers.

depth perception

For distant vision, the pupils are:

dilated

When are the pupils dilated?

for far vision

According to the reading, if the aqueous humor is over produced or not draining properly, too much pressure build up in the anterior segment. This causes the disease called:

glaucoma

Stretching of your stomach, causing a stomachache, is detected by:

interoceptors

The receptors involved in detecting painful stimuli are:

nocioceptors

Where in the eye is the light focused (brought to a point)?

on the Fovea centralis of the retina

In which situation would "eye strain", caused by continual contraction of the ciliary muscle, be more likely to occur?

reading a book or ebook for hours

The bending of light rays to bring them together at the retina is known as:

refraction

How many special senses do we have?

5

What happens for far vision?

All of the above

The region within the eyeball that is in front of the lens.

Anterior segment

Your ears "pop" when we travel to higher or change altitudes. This is due to air pressure escaping the middle ear through the _____ _____ to let the tympanic membrane snap back to position.

Auditory tube

The crista ampullaris in the semicircular canals are involved in _____ equilibrium.

Dynamic

"Far-Sightednes", in which we can see far but not near objects, is also known as:

Hyperopia

In which situation are the light rays ben too much, resulting in distant objects being focused in front of the retina?

Myopia

Sue is in 6th grade and always has to sit at the front of the class because if she sits too far back, she can't see the board. She has:

Myopia

The information from the rods and cones is ultimately sent to this area of the cerebrum to be interpreted:

Occipital lobes

According to the reading, during the holiday season, what makes children laugh (or cry)?

Sitting in Santa's lap (What the heck is wrong with this question? Will this help me learn the material? What is this?)

When you are reading this text, your pupil is small, to let less light in and to focus on the words. Your _____ _____ is hard at work.

Sphincter pupillae

Which of the following is considered a special sense?

Taste

Which of the following is a general sense?

Temperature

Where are the receptors for the special senses found?

The head

This structure divides the anterior segment into an anterior chamber and posterior chamber:

The iris

According to the reading, did you know that 70 % of sensory receptors are located in the eye? There are over one million nerve fibers located in the tracts that carry messages from the eye to the brain. We only see 1/6 of the actual eyeball. True, or false?

True

All neurons from the right side of both eyes go to the right hemisphere's occipital lobe and neurons from the left side of both eyes to the left occipital lobe due to partial crossover at the optic chiasm. True, or false?

True

For a sensation to occur, some form of stimulus must contact or stimulate a sensory receptor. True, or false?

True

Receptors act like a key and lock. Where the sensation is the key and the receptor is the lock. It must fit perfectly for it to initiate the pathway toward the CND. This explains why light waves (key) can not be detected by proprioceptors. True, or false?

True

The changing of the shape of the lens to focus light is known as:

accommodation

Which of the following can help the Auditory tube open allowing your ears to pop at high altitudes:

all of the above

If the Cochlea is a snail shell then the semicircular canals would be the snail's _____ and the vestibule would be the snail's _____.

antennas, body

The visual neural pathway transmitting action potentials from the photoreceptor, bipolar, ganglion cells to the optic nerve is like a:

chain reaction

Receptors on the tongue and in the nose can respond to:

chemicals dissolved in solution

Which of the following is NOT classified as a mechanoreceptor?

chemoreceptor

The receptors involved in taste and smell are classified as:

chemoreceptors

This receptor detects chemicals dissolved in a watery solution and are involved in the senses of taste and smell:

chemoreceptors

Which is the correct sequence of the tunics of the eye, from outermost layer innermost layer?

fibrous, vascular, nervous

If your right vestibule becomes inflamed, the weighted membrane is heavier on the right than left causing you to:

lean to the right

A tiny bug walking on your arm would be detected by these types of receptors in your skin:

light touch

Gently rubbing the back of your hand is _____ while pushing on the back of your hand is _____.

light touch, touch pressure

This type of receptor is found in the eye and detects light.

photoreceptors

Body position is detected by these receptors found in muscles, tendons, and joints:

proprioceptors

The vestibule is involved in _____ equilibrium.

static

Gustation is also known as:

taste

The innermost layer of the eye is the retina and contains:

the photoreceptors

The receptors for gustation are found in:

the taste buds

Cold and warmth are detected by receptors in the skin and are examples of this sensation:

thermal

This gel-like material fills the posterior segment and helps to hold the retina in place:

vitreous humor