Practical #1

Question 1

Lateral rectus muscle

Answer 1

moves eye laterally

Question 2

Medial rectus muscle

Answer 2

moves eye medially

Question 3

Superior rectus muscle

Answer 3

elevates eye and turns it medially

Question 4

inferior rectus muscle

Answer 4

depresses eye and turns it medially

Question 5

Superior oblique muscle

Answer 5

depresses eye and turns it laterally

Question 6

Inferior oblique muscle

Answer 6

elevates eye and turns it laterally

Question 7

sclera

Answer 7

white, opaque outer layer of the eye

Question 8

cornea

Answer 8

clear tissue that covers the front of the eye

Question 9

choroid

Answer 9

posterior of vascular layer. blood vessels supple all layers of the eye. Contains melanin that absorbs light to prevent scattering

Question 10

where is the ciliary body located?

Answer 10

anterior to choroid

Question 11

ciliary muscles

Answer 11

control lens shape

Question 12

ciliary processes

Answer 12

secrete aqueous humor

Question 13

ciliary zonule

Answer 13

hold lens upright

Question 14

iris

Answer 14

visible colored part of the eye. Controls diameter and size of pupil

Question 15

Pupil

Answer 15

regulates the amount of light entering the eye

Question 16

retina

Answer 16

photoreceptors, cones ( day vision) and rods (night vision)

Question 17

optic disc

Answer 17

where the optic nerve exits the eye; lacks photoreceptors “blind spot”

Question 18

fovea centralis

Answer 18

contains cones only, bipolar and ganglion layers pushed aside. Region of greatest visual acuity

Question 19

lens

Answer 19

flexible, transparent, biconvex disc that focuses light onto the retina by changing shape

Question 20

vitreous humor

Answer 20

located in the posterior segment. Transmits light, holds the retina and lens in place

Question 21

tapetum lucidum

Answer 21

allows cows to see at night (night vision)

Question 22

Where is the crista ampullaris located?

Answer 22

semicircular canal in the ear (equilibrium)

Question 23

crista ampullaris

Answer 23

responds to changes in the velocity of rotational head movements

Question 24

Which parts of the ear considered to be external?

Answer 24

auricle, external acoustic meatus, and tympanic membrane

Question 25

Which components are considered to the middle ear?

Answer 25

tympanic cavity, tensor tympani muscle, auditory tube, auditory ossicles (malleus, incus, and stapes)

Question 26

Which components are considered to the internal ear?

Answer 26

cochlea, vestibule, semicircular canals (lateral, anterior and posterior), oval window, round window, and vestibulocoholear nerve

Question 27

Which regions of the internal ear are involved with hearing? equilibrium?

Answer 27

EQ: vestibule, semicircular canals
Hearing: cochlea

Question 28

what are the 3 major types of sensory inputs used to maintain body eq and balance?

Answer 28

internal ear (vestibular apparatus), vision, and proprioreceptors in muscles and tendons

Question 29

What is the equation for hematocrit percentage?

Answer 29

RBC height divided by total blood volume x 100

Question 30

What is the average hematocrit for a male? female?

Answer 30

Male: 47 +/- 5
Female: 42+/- 5

Question 31

What condition is suggested by low hematocrit?

Answer 31

anemia

Question 32

What condition is suggested by a high hematocrit?

Answer 32

blood doping and polycethemia

Question 33

Describe the results of the agglutination test

Answer 33

If there is clumping present in either the A,B, or Rh, this would indicate the presence of the antibody which binds with the antibody. This indicates the presence of that blood type.

Question 34

If in aggultination test, if Mr. Jones has no clumping in Anti-B but in Anti-A and Anti-Rh, what is his blood type?

Answer 34

A+