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Human Senses Flashcards

Human Senses Flashcards
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Olfactory Nerve

Also known as cranial nerve I

The two nerves, on the left and right side of the body, involved in the sense of smell

Comprised of the olfactory receptor neurons and their axons

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Optical Nerve

Also known as cranial nerve II

The large nerve on the back of the eyeball responsible for sending information found on the retina to the brain

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Cones
The type of photoreceptor located primarily in the fovea of the retina used for color and detailed vision when there is enough light
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Rods
The type of photoreceptor located primarily near the side of the retina use for low light vision and the ability to see on the side of the body (periphery) without turning the eyes
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Retina
The thin layer of cells at the back of the eye on which the image brought in by the light entering your eye is imprinted to be sent to the brain
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Identify the Parts of the Eye

A: retina

B: optic nerve

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Identify the Parts of the Eye

A: cornea

B: pupil

C: iris

D: lens

E: ciliary muscles

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Lens
The structure in the eye directly behind the iris that bends and focuses light rays, leading to the creation of an image at the back of the eye
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Pupil

The black hole found in the middle of the iris, which permits light to pass into the inside of the eye

Constricts and dilates through the contracting and expanding of the iris

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Iris

The part of the eye that people refer to as eye color

Contracts or expands to change the size of the pupil, controlling the quantity of light that can reach the back of the eye

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Cornea

The transparent layer of the eye that is capable of bending light and sensing pain

Found covering the iris and pupil at the front of the eye

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Olfaction

The name given to the sense of smell

The process by which odor molecules attach to chemoreceptors in the olfactory epithelium of the nose

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Flashcard Content Overview

The ability to sense and respond to stimuli is one of the characteristics of living things. Humans, being living things, are able to sense their environment through their senses and respond to their environment through the actions of the nervous system. This flashcard set will help you review the specialized cells and structures that help you sense your environment as well as the connections they make with the nervous system.

Front
Back
Olfaction

The name given to the sense of smell

The process by which odor molecules attach to chemoreceptors in the olfactory epithelium of the nose

Cornea

The transparent layer of the eye that is capable of bending light and sensing pain

Found covering the iris and pupil at the front of the eye

Iris

The part of the eye that people refer to as eye color

Contracts or expands to change the size of the pupil, controlling the quantity of light that can reach the back of the eye

Pupil

The black hole found in the middle of the iris, which permits light to pass into the inside of the eye

Constricts and dilates through the contracting and expanding of the iris

Lens
The structure in the eye directly behind the iris that bends and focuses light rays, leading to the creation of an image at the back of the eye
Identify the Parts of the Eye

A: cornea

B: pupil

C: iris

D: lens

E: ciliary muscles

Identify the Parts of the Eye

A: retina

B: optic nerve

Retina
The thin layer of cells at the back of the eye on which the image brought in by the light entering your eye is imprinted to be sent to the brain
Rods
The type of photoreceptor located primarily near the side of the retina use for low light vision and the ability to see on the side of the body (periphery) without turning the eyes
Cones
The type of photoreceptor located primarily in the fovea of the retina used for color and detailed vision when there is enough light
Optical Nerve

Also known as cranial nerve II

The large nerve on the back of the eyeball responsible for sending information found on the retina to the brain

Olfactory Nerve

Also known as cranial nerve I

The two nerves, on the left and right side of the body, involved in the sense of smell

Comprised of the olfactory receptor neurons and their axons

Oculomotor Nerve

Also known as cranial nerve III

The nerve involved in moving the eye in different directions, opening the upper eyelid, and constricting the pupil and the muscles that control the lens

Pinna

Also known as the auricle

The structure that funnels and amplifies sound waves into the ear canal

External Auditory Meatus

Also known as the ear canal

The channel between the pinna and the eardrum

Tympanic Membrane

Also known as the eardrum

The delicate membrane that moves soundwaves to the middle ear from the outer ear

Ossicles

The name given to the three bones found in the middle ear: the malleus, incus, and stapes

Send sound waves to the inner ear from the eardrum

Vestibule

The part of the inner ear involved in the sense of balance

Responsible for recognizing movement in the horizontal or vertical direction

Semicircular Canals

The part of the inner ear involved in the sense of balance

Responsible for recognizing movement in the circular direction

Auditory Nerve

Also known as the acoustic nerve

Makes up half of cranial nerve VIII

The collection of nerve fibers that send signals from vibrating hair cells in the inner ear to the brain

Trigeminal Nerve

Also known as cranial nerve V

The nerve responsible for facial sensation

Glossopharyngeal Nerve

Also known as cranial nerve IX

The nerve partially responsible for the sense of taste, activation of salivary glands, and swallowing of food

Vagus Nerve

Also known as cranial nerve X

Two large nerves, one on each side of the body, responsible for connecting the nervous system to the digestive tract, lungs, and heart

Trochlear Nerve

Also known as cranial nerve IV

The nerve responsible for controlling the muscle that allows the eye to look to the nose

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