Skeletal Muscles

Question 1

One skeletal muscle cell is called a

Answer 1

muscle fiber

Question 2

The cytoplasm is called the

Answer 2

sarcoplasm

Question 3

Functional unit of a skeletal muscle fiber that actually shortens during contraction

Answer 3

sarcomere

Question 4

Thick myofilaments are made of the protein

Answer 4

myosin

Question 5

Thin myofilaments are made of the protein

Answer 5

actin

Question 6

Actin bonds to thick myofilaments called

Answer 6

troponin

Question 7

Troponin bonds to calium ions

Answer 7

tropomyosin

Question 8

Calcium is stored within the

Answer 8

sarcoplasmic reticulum

Question 9

T-tubules

Answer 9

are extensions of the plasma membrane that run deep within the skeletal muscle fiber

Question 10

One _____extends between two z-discs.

Answer 10

sarcomere

Question 11

Actin overlaps myosin in the

Answer 11

A-band

Question 12

The I-bands only contains

Answer 12

Thin myofilaments

Question 13

The thin myofilaments attach directly to

Answer 13

Z-discs

Question 14

Springlike molecules that prevent the sarcomere from overstretching

Answer 14

Titin

Question 15

Bundles of muscle fibers

Answer 15

fascicle

Question 16

Epymisium

Answer 16

CT covering the entire muscle

Question 17

Perymisium

Answer 17

Surrounds each bundle of muscle fibers.

Question 18

Endomysium

Answer 18

CT covering each muscle fiber

Question 19

Antagonist

Answer 19

Muscle that relaxes while others contract

Question 20

Agonist

Answer 20

AKA a prime mover, contracts to carry out a specific movement

Question 21

Synergist

Answer 21

Assists the agonist by causing a similar movement by stabilizing a joint

Question 22

Quadriceps femoris

Answer 22

Rectus Femoris
Vastus lateralis
Vastus medialis
Vastus intermedialis

Question 23

Hamstring

Answer 23

Biceps femoris
Semitendinoses
Semimembranosis

Question 24

Two muscles that contribute to achilles tendon

Answer 24

Gastrocnemius

Soleus

Question 25

Rotator cuff

Answer 25

Deltoid Supraspinatus Infraspinatus Teres minor

Question 26

Abdominal wall muscles

Answer 26

Rectus abdomis Internal oblique External oblique Transverse abdominis

Question 27

Normal inspiration

Answer 27

diaphragm | external intercostal

Question 28

Forceful exhalation

Answer 28

Tire | Internal intercostal

Question 29

Masseter

Answer 29

Chewing food

Question 30

Orbicularis oris

Answer 30

Kiss/whistle

Question 31

Orbicularis oculi

Answer 31

Close eyes

Question 32

Sternocleidomastoid left

Answer 32

rotate head to right shoulder

Question 33

Sternocleidomastoid right

Answer 33

tilt to right shoulder

Question 34

Erector spinae

Answer 34

Keeps posture extends the spine

Question 35

Compress the abdomen

Answer 35

tire

Question 36

Flex vertebral column as you bend fwd from the waist

Answer 36

ire