muscular system

Question 1

types of muscle cells

Answer 1

cardiac- interclated discs, striated
skeletal- striated, multiple nuclei
smooth- spindle, single nucleus

Question 2

insertion vs origen

Answer 2

insertion moves

origin doesnt move

Question 3

movement of muscles

Answer 3

• flexor
• extensor
• adductor
• abductor
• etc

Question 4

hypotrophy

Answer 4

-adipose/ muscle cells increase in size and amount

Question 5

atrophy

Answer 5

-shrinking of cells after less usage

Question 6

connective tissues in muscle

Answer 6

• epimysium (dense irregular)
• perimysium (dense irregular)
• endomysium (areolar)

Question 7

function of muscles

Answer 7

• control volume of organs (maintain the opening and closings)
• movement
• posture
• joint stability
• contract to cause blood flow
• heat

Question 8

process of muscle contraction

Answer 8

-axon terminal
ach in synaptic cleft
-ach creates action potential when reached the muscle
-ach is broken down
- action potention travels through the sarcolemma and t tubules
-action potential goes to the sarcoplasmic reticulum
-calcium is released to the tropinin
-actin binding site opens
-power stroke and actin connects with the myosin
-muscle contracts
-calcium leaves
-unlatch
-actin retracts

Question 9

flexor carpi radialis

Answer 9

flexes and abducts

Question 10

flexor carpi ulnaris

Answer 10

flexes and adducts wrist

Question 11

extensor carpi radialis

Answer 11

extends and abducts writst

Question 12

extensor carpi ulnaris

Answer 12

extends and adducts wrist

Question 13

gluteus maxiumus

Answer 13

extends thigh at hip

Question 14

gluteus medius

Answer 14

abducts thigh at hip

Question 15

gracilis

Answer 15

adducts thigh, flexes leg

Question 16

vastus medialis, vastus intermedius, vastus lateralis, rectus femoris

Answer 16

extend leg at the knee

Question 17

sartorius

Answer 17

flexes, abducts, lateral rotation at hip and flex knee

Question 18

semitendinosus, semimembranosus, biceps femoris

Answer 18

flex knee and extend hip

Question 19

tibialis anterior

Answer 19

dorsiflexes and inverts foot

Question 20

peroneus longus

Answer 20

plantar flexes and everts foot

Question 21

gastrocnemius

Answer 21

plantar flexes foot and aides in flexion of knee

Question 22

soleus

Answer 22

plantar flexes foot

Question 23

frontalis

Answer 23

raises eyebrows

Question 24

temporalis

Answer 24

elevates and retracts mandible

Question 25

orbicularis oculi

Answer 25

closes eye, winking

Question 26

orbicularis oris

Answer 26

speech, whistling

Question 27

masseter

Answer 27

elevates mandible, side to side, protruding, mastication

Question 28

rectus abdominis

Answer 28

flexes vertebral column, aids in defecation, urination, vomiting and childbirth

Question 29

diaphragm

Answer 29

primary muscle of breathing, alters size of thoracic cavity

Question 30

intercostals

Answer 30

elevate ribs during inhalation or draw ribs together during exhalation

Question 31

trapezius

Answer 31

shrugs shoulders, extends head

Question 32

serratus anterior

Answer 32

moves scapula laterally and forward and rotates it upward

Question 33

deltoid

Answer 33

abducts numerus

Question 34

latissimus dorsi

Answer 34

extends and adducts humerus

Question 35

sternocleidomastoid

Answer 35

flexes neck, rotates head

Question 36

pectoarlis major

Answer 36

flexes, adducts and rotates medially at shoulder

Question 37

biceps brachii

Answer 37

flexes and sipinates forearm, flexes arm

Question 38

brachioradialis

Answer 38

flexes and supinates foratm

Question 39

triceps brachii

Answer 39

extends forearm and arm