Lecture 3 Exam

Question 1

CN I (Olfactory Nerve)

Answer 1

smell

Question 2

CN II (Optic Nerve)

Answer 2

Vision

Question 3

CN III (Oculomotor Nerve)

Answer 3

controls muscles that move the eye, lift the eyelid, change pupil diameter, change lens shape

Question 4

CN IV (Trochlear Nerve)

Answer 4

superior oblique eye muscle

Question 5

CN V (Trigerminal Nerve)

Answer 5

controls muscles with chewing

Question 6

CN VI (Abducens Nerve)

Answer 6

abducts eye

Question 7

CN VII (Facial Nerve)

Answer 7

facials expressions, taste sensations from tongue

Question 8

CN VIII (Vestibulocochlear Nerve)

Answer 8

hearing and equilibrium

Question 9

CN IX (Glossopharyngeal Nerve)

Answer 9

receives taste and touch from the tongue

Question 10

CN X (Vagus Nerve)

Answer 10

controls the muscles in the pharynx and larynx

Question 11

CN XI (Accessory Nerve)

Answer 11

controls the muscles in the neck

Question 12

CN XII (Hypoglossal Nerve)

Answer 12

controls tongue muscles

Question 13

Epimysium

Answer 13

Dense irregular CT wrapping whole muscle

Question 14

Perimysium

Answer 14

Dense irregular CT wrapping each fascicle
houses many blood vessels and nerves

Question 15

Endomysium

Answer 15

Areolar CT wrapping individual muscle fibers
electrical insulation, capillary support, binds neighboring cells

Question 16

Tendon

Answer 16

cordlike structure of dense regular CT

Question 17

Aponeurosis

Answer 17

thin, flattened sheet of dense irregular tissue

Question 18

muscles twitch

Answer 18

response to a single brief stimulus

Question 19

Graded Contraction

Answer 19

1. Produce wave summation
2. Produce multiple motor unit summation

Question 20

Threshold Stimulus

Answer 20

the minimum amount of force or stimulation needed to trigger a response in an organism

Question 21

Maximal Stimulus

Answer 21

the strongest possible stimulus that occurs to produce the most muscle contraction

Question 22

Submaximal Stimulus

Answer 22

activates different nerve fiber populations at different sites, and is less than a maximal stimulus

Question 23

Supramaximal Stimulus

Answer 23

uses a voltage or current intensity that is significantly higher than what is required to activate all muscle fibers

Question 24

Muscle Fatigue

Answer 24

intracellular acidosis due mainly to lactic acid accumulation

Question 25

Muscle Tone

Answer 25

the amount of tension( or resistance to movement) in muscles

Question 26

Isotonic muscle contractions

Answer 26

occur when a muscle’s contraction force matches that total load on the muscle, causing the muscle to change length while maintaining constant tension