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Chapter 13 The Senses > The Senses Summary > Flashcards

The Senses Summary Flashcards

1
Q

What is a sensory receptor?

A

A sensory receptor is a structure in the dermis that initiate nerve impulses which can reach our conscious awareness. They sense changes in their surroundings.

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2
Q

List the types of receptors?

A
  • Chemoreceptors - Nociceptors - Thermo-receptors. - Mechano-receptors. - photo-receptors.
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3
Q

Where are chemoreceptors found?

A

Chemoreceptors are located in the aortic arch, which is responsible for increasing cardiac output.

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4
Q

What is the purpose of thermo-receptors?

A

Thermo-receptors senses temperature change.

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5
Q

What is the purpose of mechando-receptors?

A

Mechano-receptors sense mechanical stimulation such as changes in pressure or tension.

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6
Q

What is the purpose of photo-receptors?

A

Photo-receptors are sensitive to light energy including rods and cones on the eye.

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7
Q

Can receptors identify any stimulus.

A

No, each receptor are most sensitive to a distinct stimulation.

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8
Q

What is classed as a general sense?

A

General senses include touch, pressure, temperature and pain.

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9
Q

Where are the receptors associated with general senses?

A

The receptors associated with general senses are located in the skin, muscles, joints and visceral organs.

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10
Q

Where are the receptors for special senses located?

A

special senses receptors are located within sensory organs within the head.

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11
Q

What re special senses?

A

Special senses are smell, taste, hearing, equilibrium and sight.

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12
Q

Where are the olfactory receptors?

A

The olfactory organs consist of receptors and supporting cells within the nasal cavity.

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13
Q

What do taste receptors consist of?

A

Taste receptors consist of taste cells ad supporting cells.

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14
Q

What are the basic taste sensations?

A

Taste sensations are sweetness, sourness, saltiness, bitterness and Unami which is deliciousness.

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15
Q

How does an ear work>

A

The outer, middle and inner ear work together receiving vibrations which are received as sound.

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16
Q

What makes up the outer ear?

A

The auricle, pinnacle, external acoustic meats up to the tympanic membrane (eardrum).

17
Q

What is the inner ear made up of>

A

It is made up of tympanic cavity which contains the auditory ossicles and is connected to the throat via the auditory tube.

18
Q

What is the inner ear made up of?

A

The inner ear is made up of chambers and tubes and a bony labyrinth which is the rigid out wall of the inner ear, consists of the vestibule, semicircular canals and cochlea.

19
Q

What is the semicircular canals involved with?

A

The sense of equilibrium consists of static & dynamic equilibrium.

20
Q

How important is vision?

A

The vision is the dominant sense.

21
Q

How many layers of tissue does an eye have?

A

They have three layers.

22
Q

Describe the other layer?

A

The outer layer is fibrous and anterior in position bulging forward to form the transparent cornea.

23
Q

How does the cornea work?

A

The cornea & lens of each eye refract light waves to focus an image on the retina. A transmission of visual perception to the brain.

24
Q

Describe the fibre of the outer layer?

A

The outer layer is called the sclera. It is white, fibrous and makes up most of the outer layer.

25
Q

Describe the middle layer of the eye?

A

The middle layer is called the úvea, it is vascular and includes the choroid coat, aliary body and iris.

26
Q

Describe the inner layer?

A

The inner layer of the eye is the nervous layer and consists of the retina and its millions of photoreceptors.

27
Q

What is the term to describe light waves bend and focus?

A

This is called refraction.

28
Q

What provides vision in dim light?

A

Photoreceptors known as rods provide vision in dim light without colour.

29
Q

How is the pupil held in position?

A

It is held in place by many suspensor ligaments behind iris and pupil.

30
Q

Label Ear Diagram

A
31
Q

Label Eye Diagram

A

Chapter 13 The Senses (1 decks)

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