Practical #1 Flashcards Preview

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Flashcards in Practical #1 Deck (34):
1

Lateral rectus muscle

moves eye laterally

2

Medial rectus muscle

moves eye medially

3

Superior rectus muscle

elevates eye and turns it medially

4

inferior rectus muscle

depresses eye and turns it medially

5

Superior oblique muscle

depresses eye and turns it laterally

6

Inferior oblique muscle

elevates eye and turns it laterally

7

sclera

white, opaque outer layer of the eye

8

cornea

clear tissue that covers the front of the eye

9

choroid

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

10

where is the ciliary body located?

anterior to choroid

11

ciliary muscles

control lens shape

12

ciliary processes

secrete aqueous humor

13

ciliary zonule

hold lens upright

14

iris

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

15

Pupil

regulates the amount of light entering the eye

16

retina

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

17

optic disc

where the optic nerve exits the eye; lacks photoreceptors "blind spot"

18

fovea centralis

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

19

lens

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

20

vitreous humor

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

21

tapetum lucidum

allows cows to see at night (night vision)

22

Where is the crista ampullaris located?

semicircular canal in the ear (equilibrium)

23

crista ampullaris

responds to changes in the velocity of rotational head movements

24

Which parts of the ear considered to be external?

auricle, external acoustic meatus, and tympanic membrane

25

Which components are considered to the middle ear?

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

26

Which components are considered to the internal ear?

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

27

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

EQ: vestibule, semicircular canals
Hearing: cochlea

28

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

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

29

What is the equation for hematocrit percentage?

RBC height divided by total blood volume x 100

30

What is the average hematocrit for a male? female?

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

31

What condition is suggested by low hematocrit?

anemia

32

What condition is suggested by a high hematocrit?

blood doping and polycethemia

33

Describe the results of the agglutination test

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.

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?

A+