Muscles In The Body

Question 1

Masseter

Answer 1

Elevates mandible

Question 2

Deltoid

Answer 2

Abducts and rotates arm.

Question 3

Trapezius

Answer 3

Elevates clavicle
Adducts,elevates and depresses scapula

Question 4

Pectoralis major

Answer 4

Adducts and medially rotates arm: flexes arm at shoulder

Question 5

Biceps brachii

Answer 5

Flexes arm at the elbow and arm at the shoulder

Question 6

Tricep brachii

Answer 6

Extends arm at elbow and arm at shoulder

Question 7

External intercostals

Answer 7

Elevates the ribs during inspiration

Question 8

Internal intercostals

Answer 8

Depresses the ribs during forced expiration

Question 9

Diaphragm

Answer 9

Pulls central tendon down increasing volume of the thorax

Question 10

Latissimus Dorsi

Answer 10

Adducts and medially rotates arm and extends arm at shoulder

Question 11

External and internal obliques

Answer 11

Lateral flexion of vertebral column (one)
Compression of abdomen (both)

Question 12

Rectus abdominis

Answer 12

Flexes vertebral column
Compresses abdomen

Question 13

Transverses abdominis

Answer 13

Compresses abdomen

Question 14

Gluteus Maximus

Answer 14

Extension of leg at hip
Lateral rotation of leg

Question 15

Gluteus medius

Answer 15

Abduction and medial rotation of the leg

Question 16

Gluteus minimus

Answer 16

Abduction and medial rotation of leg

Question 17

Rectus femoris

Answer 17

Flexion of leg at hip
Extension of leg at knee

Question 18

Vastus lateralis

Answer 18

Extension of leg at knee

Question 19

Vastus medialis

Answer 19

Extension of leg at knee

Question 20

Vastus intermedius

Answer 20

Extension of leg at knee

Question 21

Biceps femoris

Answer 21

Extension of leg at hip
Flexion of leg at knee

Question 22

Semitendinosus

Answer 22

Extension of leg at hip
Flexion of leg at knee

Question 23

Semimembranosus

Answer 23

Extension of leg at hip
Flexion of leg at knee

Question 24

Adductor muscles

Answer 24

Abduction of the leg at the hip

Question 25

Gastrocnemius

Answer 25

Plantar flexion of foot
Flexion of leg at knee

Question 26

Skeletal muscle

Answer 26

Controlled: voluntary
muscle fibers are the cells in skeletal muscle
Appearance: striated (striped appearance)
Multinucleate (multiple nuclei)

Question 28

Cardiac muscle

Answer 28

Found in: the heart
Movement: involuntary
Intercalated discs act to connect the cell to another cardiac muscle cell

Question 29

Intercalated dics

Answer 29

Transverse plates that contain gap junctions to allow ions and action potential to pass easily from cell to cell
Also contain desmosomes to hold cells together during contraction

Question 30

Smooth muscle (visceral muscle)

Answer 30

Movement: involuntary
Structure: composed of spindle shaped non striated cells
Have a circular layer and longitudinal layer

Question 31

Circular layer

Answer 31

Where the long axis of the spindle shaped cells wraps around the intestine which forms a circle

Question 32

Longitudinal layer

Answer 32

Where the long axis of the spindle shaped cells in aligned with the long axis of the intestine