Lab Quiz #7

Question 1

Pectoralis Major

Answer 1

Flexion, adduction, and medial rotation of the arm.

Question 2

Latissimus Dorsi

Answer 2

Extension, adduction, and medial rotation of the arm.

Question 3

Deltoid

Answer 3

Abducts and rotates arm

Question 4

Brachioradialis

Answer 4

Flexion of forearm

Question 5

Brachialis

Answer 5

Flexion of forearm

Question 6

Biceps Brachii

Answer 6

Flexion and supination of forearm; flexion of arm

Question 7

Triceps Brachii

Answer 7

Extension of forearm; long head extends and adducts arm

Question 8

Pectineus

Answer 8

Adduction and flexion of thigh

Question 9

Adductor Longus

Answer 9

Adduction and flexion of thigh

Question 10

Gracilis

Answer 10

Adduction of thigh; flexion and medial rotation of leg

Question 11

Sartorius

Answer 11

Flexion, abduction, and lateral rotation of thigh; flexion of leg

Question 12

Vastus Intermedius

Answer 12

Extension of leg

Question 13

Vastus Lateralis

Answer 13

Extension of leg

Question 14

Vastus Medialis

Answer 14

Extension of leg

Question 15

Rectus Femoris

Answer 15

Extension of leg; flexion of thigh

Question 16

Semimembranosus

Answer 16

Extension of thigh; flexion of leg

Question 17

Semitendinosus

Answer 17

Extension of thigh; flexion of leg

Question 18

Biceps Femoris

Answer 18

Extension of thigh; flexion of leg

Question 19

Gluteus Maximus

Answer 19

Extension and lateral rotation of thigh/hip; powerful extensor for climbing and running.

Question 20

Gluteus Medius

Answer 20

Abduction and medial rotation of thigh; steadies the pelvis during walking.

Question 21

Tibialis Anterior

Answer 21

Dorsiflexion and inversion of the foot

Question 22

Soleus

Answer 22

Plantar flexion of foot

Question 23

Gastrocnemius

Answer 23

Plantar flexion of foot; flexion of the leg

Question 24

Physiology of muscle contraction: Your Brain

Answer 24

Signal from nervous system arrives at muscle, via synapsis

Question 25

Physiology of muscle contraction: Muscle Cell Membrane

Answer 25

Action Potential spreads across muscle membrane (sarcolemma)

Question 26

Physiology of muscle contraction: Sarcoplasmic Reticulum (SR)

Answer 26

Action Potential releases Calcium ion (Ca2+) into sarcoplasm, creating more of a positive charge

Question 27

Physiology of muscle contraction: Actin and Myosin Filaments

Answer 27

Ca2+ triggers actin to bind with myosin - Sarcomere shortens - Cycle keeps repeating as long as Ca2+ present and ATP available (to break actin and myosin)

Question 28

Delayed Calcium Uptake

Answer 28

When too much Calcium is released in the sarcoplasm, it can take a little extra time after voluntary muscle exertion until muscle relaxes.

Question 29

Muscle Fatigue

Answer 29

Loss of the ability to contract. - Eventually, production of ATP falls behind demand. - Lactic Acid is released at this point

Question 30

Flexion/Extension

Answer 30

F: Bending action that DECREASES angle between body parts E: Straightening action that INCREASES angle between body parts

Question 31

Abduction/Adduction

Answer 31

Ab: moving AWAY from median plane, on coronal plane Ad: moving TOWARD median plane, on coronal plane

Question 32

Supination/Pronation

Answer 32

S: rotating forearm and hand laterally so palm faces anteriorly P: rotating forearm and hand medially so palm faces posteriorly

Question 33

Circumduction/Rotation

Answer 33

C: moving in a circle to make a cone R: rotation along a long axis

Question 34

Dorsiflexion/Plantar Flexion

Answer 34

D: a bending action that elevates the soles (stand on heels) PF: a bending action that elevates the heels (standing on toes)

Question 35

Tensor Fasciae Latae

Answer 35

Flexes, abducts, and medially rotates thigh; steadies trunk on thigh while standing.

Question 36

Effect of load on time to muscle fatigue

Answer 36

Greater the load, the faster muscles will fatigue

Question 37

What happens to cause muscle fatigue?

Answer 37

ATP is used up, and lactic acid is being released.

Question 38

Upper Leg/Thigh: Posterior

Answer 38

``` Semimembranosus Semitendinosus Biceps Femoris Gluteus Maximus Gluteus Medius ```

Question 39

Upper Leg/Thigh: Lateral

Answer 39

Tensor Fasciae Latae

Question 40

Upper Leg/Thigh: Anterior

Answer 40

Rectus Femoris Vastus Intermedius Vastus Lateralus Sartorius

Question 41

Arm: Extensor

Answer 41

Triceps Brachii

Question 42

Trunk

Answer 42

Pectoralis Major Deltoid Latissimus Dorsi

Question 43

Arm: Flexors

Answer 43

Brachioradialis Biceps Brachii Brachialis

Question 44

Lower Leg: Posterior

Answer 44

Gastrocnemius | Soleus

Question 45

Upper Leg/Thigh: Medial

Answer 45

Adductor Longus Pectineus Vastus Medialis Gracilis

Question 46

Lower Leg: Anterior

Answer 46

Tibialis Anterior