Lab V

Question 1

Accommodation

Answer 1

Ability to change shape of lens

Question 2

Astigmatism

Answer 2

Irregularity of corena or lens

Question 3

Fovea Centrails

Answer 3

Area of sharpest vision

Question 4

Hyperopia

Answer 4

Farsightedness

Question 5

Macula lutea

Answer 5

Yellow spot

Question 6

Myopia

Answer 6

Nearsightedness

Question 7

Optic Disc

Answer 7

Blind Spot

Question 8

Presbyopia

Answer 8

Loss of lens elasticity due to age

Question 9

Visual acuity

Answer 9

Sharpness of vision

Question 10

List the general senses

Answer 10

Pain Touch Pressure Temperature

Question 11

List the special senses

Answer 11

Hearing Sight Taste Equilibrium Smell

Question 12

What test was used in lab to detect color-blindness?

Answer 12

Ishiharais Test (book with colored numbers in circles)

Question 13

What test was used in lab to determine visual acuity?

Answer 13

Snellen Eye Chart (letter/shape chart read at 20 feet, 20/20)

Question 14

Name two tests that can be used for testing hearing

Answer 14

• Rinne Test
• Weber Test

Question 15

Name two types of deafness and state the causes of each. Which type can be improved with a hearing aid?

Answer 15

1. Conduction - helped with hearing aid
2. Sensory - something wrong with nerves, can only be helped with cochlear implant

Question 16

What two cranial nerves receive sensory information from taste buds on the tongue?

Answer 16

VII - Facial IX - Glossopharyngeal

Question 17

Roughly sketch the areas for the four basic taste sensations on the tongue.

Answer 17

Bitter - at back (toward throat) and center of tongue Sweet - at front (toward teeth) and center of tongue Sour - Sides, toward back of tongue Salt - Sides, toward front of tongue

Question 18

When whole blood is centrifuged, it separates into two main fractions which are ______ and ______.

Answer 18

formed elements and plasma

Question 19

Name three types of blood cells.

Answer 19

Erythrocytes (RBC) Leukocytes (WBC) Thrombocytes (platelets)

Question 20

What is the hematocrit and how is it measured?

Answer 20

Packed red cell volume (height of PRBC compared to entire column). Traditionally measured in a capillary tube after centrifugation. Now usually auto-measured with machine.

Question 21

If given one of the four blood groups (A, B, AB or O) be able to state the antigen found on the red blood cell and the antibodies found in the plasma.

Answer 21

A = antigen is A, antibody is anti-B

B = antigen is B, antibody is anti-A

AB = antigens are A & B, no antibodies

O = no antigens on cells, antibodies A & B in plasma

Question 22

If given a list of structures, be able to trace a drop of blood through the heart by numbering the structures in the correct order.

Answer 22

1. vena cava (from the body)
2. right atrium
3. tricuspid valve
4. right ventricle
5. pulmonary semilunar valve
6. pulmonary artery
7. lungs
8. pulmonary vein
9. left atrium
10. bicuspid valve
11. left ventricle
12. aorta semilunar valve
13. aorta (to the body)

Question 23

Name the three layers of tissue that make up the wall of the heart.

Answer 23

Epicardium (exterior layer) Myocardium (middle layer) Endocardium (inner layer)

Question 24

Name several structures in the fetal circulation that are no longer needed after birth

Answer 24

• Foramen ovale
• Ductus arteriosis
• Umbilical artery/vein

Question 25

Nystagmus

Answer 25

rapid eye movement after spinning around

Question 26

Ear Model

Answer 26

-auditory canal -cochlea -eardrum -ear osicles (malleus, incus, stapes) -semicircular canals -auditory tube