Chapter 19, General and Special Senses Flashcards

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1
Q

Sensation

A

The constant awareness of the stimuli

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2
Q

Stimuli

A

anything that produces a response in an organism or in a cell or tissue of an organism.

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3
Q

How are stimuli detected

A

By receptors

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4
Q

General senses

A

Temperature, pain, touch, stretch, and pressure

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5
Q

Special senses

A

Gustation (taste) , olfaction vision, equilibrium, and audition(hearing)

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6
Q

Receptors change…

A

one form of energy into another

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7
Q

Receptors can be

A

Tonic or Phasic

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8
Q

Tonic

A

Responds at a fast rate

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9
Q

Phasic

A

Responds at a slow rate

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10
Q

Where are general sense receptors

A

Throughout the skin

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11
Q

Where are special sense receptors

A

Inside the complex organs in the head

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12
Q

What are the three things used to describe receptors?

A

receptor distribution, stimulus origin, modality stimulation

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13
Q

Somatic receptors

A

Found within the body wall, Receptors for chemicals, temperature, pain, touch, proprioception, and
pressure.

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14
Q

Visceral receptors

A

Found in walls of the viscera, responds to chemicals, temperature, and pressure

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15
Q

Exteroceptors

A

A receptor that receives external stimuli, found in mucous membranes like the nasal, oral, and vaginal cavities.

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16
Q

Interoceptors

A

Found in viscera walls, detects stretching, oxygen, temperature, and pressure.

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17
Q

Proprioceptors

A

Found in muscles, tendons, and joints. detects body and limb movement

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18
Q

Chemoreceptors

A

Detects specific molecules that are dissolved in the fluid

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19
Q

Thermoreceptors

A

Detects changes in temperature

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20
Q

Photoreceptors

A

Detects changes in light intensity, color, and movement of light

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21
Q

Mechanoreceptors

A

Detects physical deformation due to touch, pressure, vibration, and stretch.

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22
Q

Baroreceptors

A

Detects the pressure changes within body structures

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23
Q

Nociceptors

A

Detects tissue damage and pain

24
Q

Referred pain

A

When impulses from certain viscera are perceived for originating from near the skin

25
Q

Tactile receptors

A

The most numerous type of receptor, Located in the dermis

26
Q

Unencapsulated

A

Endings not wrapped in connective tissue or glial cells

27
Q

Encapsulated

A

Endings wrapped in connective tissue or glial cells

28
Q

Free nerve endings

A

Found in the papillary layer of the dermis and deep epidermis

29
Q

Root hair plexuses

A

Surround hair follicles in the dermis

30
Q

Tactile discs

A

Associated with tactile cells in stratum Basile of the epidermis

31
Q

End bulbs

A

In the skin and mucous membranes of the oral and nasal cavities, vaginal, and anal canal

32
Q

Lamellated corpuscles

A

In the dermis, subcutaneous tissue, synovial membranes, and viscera

33
Q

Bulbous corpuscles

A

In the dermis and subcutaneous layer

34
Q

Tactile corpuscles

A

In dermal papillae, especially lips, palms, eyelids, nipples, and genitals

35
Q

Gustation

A

The sense of taste, the gustatory cells are taste receptors housed in specialized organs termed taste buds. Located on the dorsal surface of the tongue in epithelial and connective tissue functions.

36
Q

Four types of the papillae

A

Filiform papillae, Fungiform papillae, Foliate papillae, Vallate papillae

37
Q

What is each taste bud composed of

A

Gustatory cells are enclosed in supporting cells, each gustatory cell has a dendritic ending

38
Q

Five taste sensations from gustatory cells

A

Sweet, Salty, sour, bitter, umami

39
Q

Olfaction

A

Sense of smell, much less sensitive in humans than in animals

40
Q

Olfactory Organs

A

Epithelium of the Olfactory- has 3 cell types: Olfactory receptor cells, supporting cells, basal cells. Under the epithelium is the Lamina Propia.

41
Q

What do accessory cells do in the eye

A

Prevents foreign objects + substances from coming into contact with the eye.

42
Q

What are external accessory cells

A

Eyelids, Eyelashes, Eyebrows

43
Q

Conjunctiva

A

Lines the anterior of the eye and inside the eyelid, contains goblet cells to moisten the eye

44
Q

Lacrimal Apparatus

A

Produces, collects, and drains tears from the eye

45
Q

Lacrimal Fluid

A

tears. Moistens the anterior portion of the eye and helps prevent bacterial infections because they contain antibodies called lysozyme.

46
Q

Fibrous tunic

A

Contains cornea(the transparent area that receives oxygen) and sclera( the white)

47
Q

Vascular tunic

A

Contains choroid(Supplies nutrients and oxygen to the retina), ciliary body ( Has ciliary muscles that change lens shape), and iris(Controls the amount of light entering eye, controls the amount of light entering the eye)

48
Q

Retina

A

Has a pigmented layer( attached to the choroid, Absorbs light energy) and a Neural layer( Houses photoreceptors and other associated neurons).

49
Q

Lens

A

transparent and deformable structure. Behind the pupil and sensory ligaments

50
Q

The ear is divided into three different regions

A

External, middle, and inner ear

51
Q

External ear

A

Skin-covered elastic cartilage is called the auricle. The auricle leads to the external acoustic meatus. Ends at tympanic membrane(eardrum). Produces a wax-like secretion called cerumen(earwax)

52
Q

Middle ear

A

Air-filled tympanic cavity (An opening to the auditory tube that connects to the nasopharynx). Three auditory ossicles: Malleus(hammer), Incus(Anvil), Stapes(Stirrup)

53
Q

Inner ear

A

Located within the spaces of the petrous part of temporal; bone. In those spaces is the bony labyrinth. Inside those are fluid-filled tubes and spaces called membranous labyrinths.

54
Q

What three regions are in bony labyrinths

A

Vestibule, Semicircular canals, Cochlea

55
Q

Vestibule

A

Two parts: Utricle and saccule

56
Q

Cochlea

A

organ for hearing