Module 11

Question 1

The awareness of changes in the internal and external environment

Answer 1

Sensation

Question 2

The conscious interpretation of those stimuli

Answer 2

Perception

Question 3

What does survival depend on?

Answer 3

Sensation and Perception

Question 4

Stimulus must be applied in a _____ field and the stimulus energy is converted into a graded potential called a _____ potential

Answer 4

receptive

receptor

Question 5

In these kinds of receptors, the receptor and the generator potential are the same thing. The stimulus happens, the receptor/generator in afferent neuron and then the action potenital hits the first node of ravier

Answer 5

general sense receptor

Question 6

In this type of receptor level, the stimulus happens, receptors potential in the cell, release of neurotransmitter, generator potential, action potential if the threshhold is reached

Answer 6

Special sense orders

Question 7

These receptors signal the beginning or end of a stimulus

Answer 7

Phasic or fast adapting receptors

Question 8

This sensory receptor adapts slowly or not at all

Answer 8

Tonic Receptor

Question 9

This order of neurons conducts impulses from the receptor level to the second order neurons in the CNS

Answer 9

First-Order Neurons

Question 10

This order of neurons transmits impulses to the thalamus or the cerebellum

Answer 10

Second-order Neuron

Question 11

This order of neurons conducts impulses from the thalamus to the stomatosensory cortex

Answer 11

Third-order neurons

Question 12

This sitmulus responds to touch pressure, viberation, strech or itch

Answer 12

Mechanoreceptors

Question 13

These receptors are Sensitive to change in temperture

Answer 13

Thermoreceptors

Question 14

This receptor responds to light energy (retina)

Answer 14

Photoreceptors

Question 15

This stimulus repsonds to chemical stimulus (smell, blood chemistry)

Answer 15

Chemoreceptors

Question 16

These stimulus receptors are senstive to pain-causing stimuli, like extreme hot or cold

Answer 16

Nociceptors

Question 17

This part of the eye overlies the supraorbital margins and provides shading of eye and prevents sweat from reaching eye

Answer 17

Eyebrows

Question 18

These protect the eye interiorly

Answer 18

Eyelid

Question 19

This is the transparent membrane of the eye and produces secretions

Answer 19

Conjuctiva

Question 20

This conjunctiva covers the white of the eyes

Answer 20

Bulbar Conjunctiva

Question 21

These are how tears are secreted, also are connected to the nasal cavity

Answer 21

Lacriminal Apparatus

Question 22

How many extrinsic muscles help move the eye?

Answer 22

six

Question 23

There are four rectus muscles that move the eye in what directions?

Answer 23

inferior superior lateral medial

Question 24

These two oblique muscles move the eye which way?

Answer 24

Inferior and superior

Question 25

What three layers does the wall of the eyeball contain?

Answer 25

Fibrous Vascular Sensory

Question 26

What is the internal cavity of the eye contain?

Answer 26

Humors

Question 27

This is the outermost layer of the eye that has two regions, the cornea and the cilliary body

Answer 27

Fibrous Layer

Question 28

This is contained in the fibrous layer and protects and shapes the eyeball

Answer 28

Sclera

Question 29

This is contained in the fibrous layer and bends the light as it enters the eye. It has numerous pain receptors that contribute to blinking and tearing

Answer 29

Cornea

Question 30

This is the middle layer of the eye and is known for giving the eyeball pigment

Answer 30

Vascular Layer or Uvea

Question 31

This region of the Uvea supplies blood to all the layers of the eyeball

Answer 31

Choroid region

Question 32

This is the ring of the Uvea layer of the eye that surrounds the lens and contains things that control lens shape as well as holding the lens in position

Answer 32

Ciliary Body

Question 33

This part of the Uvea is responsible for the color of the eye and has an opening that reguates light coming in called _____

Answer 33

Iris | Pupil

Question 34

For close vision and bright light _____ contracts and ____ constricts

Answer 34

Schincter papillae contacts and pupils constrict

Question 35

For Distant vision and dim light ____ contracts _____ dialate

Answer 35

Dialator papillaw contracts and pupils dialate

Question 36

What are the two delicate layers of the retina?

Answer 36

Pigmented layer and Neural layer

Question 37

This is also known as our blind spot

Answer 37

Optic disc

Question 38

What are the two photoreceptors?

Answer 38

Rods and Cones

Question 39

These are a photoreceptor and operate in dim light and provide indistinctive, noncolor vision

Answer 39

Rods

Question 40

These are photorecptors that are found in the macula lute and operate in bright light and allow us to have a very color vision

Answer 40

Cones

Question 41

The posterior part of the eye contains _____ fluid

Answer 41

vitreous humor

Question 42

The Anterior part of the eye is conposed of two layers but contains _____ fluid filtered by ciliary processes

Answer 42

Aqueous humor

Question 43

This is the compression of the retina and optic nerve is drainage of aqueous humor is blocked

Answer 43

Glaucoma

Question 44

This allows precise focusing of the retina, becomes less convex and more dense with age

Answer 44

Lens

Question 45

This is the bending of light rays due to change in speed when light passes from one medium to another

Answer 45

Refraction

Question 46

Light is refracted at the _____ when entering and leaving the lens

Answer 46

Cornea

Question 47

This is the changing of a lens shape by colliery muscles to increase refractory power

Answer 47

Accomodation

Question 48

This is the loss of vision over age 50

Answer 48

Presbyopia

Question 49

This prevents pupillary reflex that constricts to prevent the most divergent light rays from entering the eye

Answer 49

Constriction

Question 50

This is the medial rotation of the eyeballs toward the object being viewed

Answer 50

Convergence

Question 51

This is caused by unequal curvatures in different parts of the cornea or lens

Answer 51

Astigmatism

Question 52

This happens when moving from dark to light, large amounts of pigments are broken down, pupil constrict and cones rapidly adapt

Answer 52

light adaptation

Question 53

This occurs when moving from bright light into darkness, cones stop functioning, pupils dialate, Rhodopsin accumulates in the dark and retinal sensitivity within 20 mins

Answer 53

Dark adaptation

Question 54

This is a focal point is infront of the retina, the eye is too long

Answer 54

Myopia or nearsightedness

Question 55

This is when a focal point is behind the retina, the eye is too short

Answer 55

Hyperopia or farsightedness