Chapter 7

Question 1

aerobic respiration

Answer 1

Requires oxygen

Question 2

properties of muscle tissue

Answer 2

contractibility
excitability
extensibility
elasticity

Question 3

muscle facia

Answer 3

what the muscle is surrounded by

separates muscle from the other muscles

Question 4

agonist

Answer 4

primary mover

a muscle that contracts while another relaxes

Question 5

retinaculum

Answer 5

any region on the body in which tendon groups from different muscles pass under one connective tissue band

Question 6

insertion

Answer 6

muscle attaches furthest from the midline

end of the muscle attached to the bone undergoing the greatest movement

Question 7

sliding filament model

Answer 7

the process of muslce contraction where actin myofilaments slide past myosin myofilaments during contraction

Question 8

elasticity

Answer 8

muscle can recoil to original resting length after being stretched

Question 9

extensibility

Answer 9

the muscle can be stretched beyond normal resting length but can still contract

Question 10

excitability

Answer 10

the capacity of a muscle to respond to a stimulus

Question 11

tendon

Answer 11

attatched muscle to bone

Question 12

energy requirements

Answer 12

aerobic respiration
anaerobic respiration
creatine phosphate breakdown

Question 13

acetylcholinesterase

Answer 13

enzyme thats breaks down Ach to acetic acid an choline

Question 14

Perimysium

Answer 14

Fibrous sheath enveloping each of the skeletal muscle fascicles

Question 15

Sarcomere

Answer 15

Part of a myofibril formed of actin and myosin myofilaments

Question 16

muscles are named according to

Answer 16

location
# of heads
fucntion
shape
size
orientation

Question 17

most abundant tissue in the body

Answer 17

muscle tissue

40% of body weight

Question 18

myofibrils

Answer 18

protein structures that make up muscle fibers

Question 19

synergists

Answer 19

assisting muscle

Question 20

Endomysium

Answer 20

Fine connective tissue sheath surrounding a muscle fiber

Question 21

neurotransmitter

Answer 21

chemical released from a neuron

Question 22

contractibility

Answer 22

the ability for the muscle to contract

causes structures to move

Question 23

neuromuscular junction

Answer 23

nerve and muscle coming together

Point of contact between nerve and muscle, release synaptic vessels when stimulated

Question 24

antagonist

Answer 24

muscle opposite of another

Question 25

acetylcholine

Answer 25

Ach released from motor neurons use of muscle

Question 26

motor unit

Answer 26

a single motor neuron and all the skeletal muscles it innervates

Question 27

origin (head)

Answer 27

where muscle attached to bone closest to the midline head=multiple origins the less movable attachment point of a muscle

Question 28

anaerobic

Answer 28

doesn't require oxygen

Question 29

prime mover

Answer 29

main muscle doing a task

Question 30

recruitment

Answer 30

more motor units are stimulated increases the total number of muscle fibers contracting recruit more muscles when lifting something heavy

Question 31

muscle fasciculi

Answer 31

perimysium loose connective tissue that separates muscle fascicles from each other bundle of muscle fibers

Question 32

functions of muscles

Answer 32

``` movement posture heat production respiration communication constriction of vessels heartbeat ```

Question 33

proteins that makeup muscles

Answer 33

actin and myosin

Question 34

muscle fibers

Answer 34

endomysium muscle cell Make up muscle fascicule

Question 35

belly

Answer 35

part b/t origin and insertion | middle

Question 36

3 types of muscles

Answer 36

smooth, skeletal, cardiac

Question 37

skeletal muscle

Answer 37

striated voluntary (control with your mind) multiple nuclei

Question 38

smooth muscle

Answer 38

no striations own nucleus involuntary

Question 39

cardiac muscle

Answer 39

striations single nucleus involuntary

Question 40

Myosin acts on ____, sarcomere gets shorter

Answer 40

actin

Question 41

deltoid

Answer 41

shoulder

Question 42

rectus abdominis

Answer 42

abs

Question 43

pectoralis major

Answer 43

chest

Question 44

biceps brachii

Answer 44

flexes forearm; anterior side of humerus

Question 45

Hamstrings

Answer 45

muscle group that extends the thigh and flexes the knee

Question 46

Quadriceps

Answer 46

a muscle group consisting of four muscles that is located along the front of the thigh

Question 47

Gastrocnemius

Answer 47

calf muscle

Question 48

linea alba

Answer 48

white line down middle of the abdomen

Question 49

Trapezius

Answer 49

Elevates, depresses, retracts, and rotates the scapula; rotates the arm. Upper back to neck

Question 50

Sternocleidomastoid

Answer 50

Flexes and laterally rotates the head

Question 51

Lattisimus Dorsi

Answer 51

Adducts arm, lower back to side

Question 52

triceps brachii

Answer 52

extends forearm; on posterior side of humerus

Question 53

Achilles tendon

Answer 53

a large tendon that runs from the heel to the calf

Question 54

Sartorius

Answer 54

Flexes thigh on hip; runs from hip to knee