MUSCULAR SYSTEM

Question 1

responsible for all types of body movement

Answer 1

MUSCLES

Question 2

attached by tendons to bones

Answer 2

SKELETAL MUSCLE

Question 3

obvious stripes

Answer 3

STRIATED MUSCLE

Question 4

only muscle tissue subject to conscious control

Answer 4

VOLUNTARY MUSCLE

Question 5

encloses a single muscle fiber

Answer 5

ENDOMYSIUM

Question 6

wraps around a fascicle of muscle fibers

Answer 6

PERIMYSIUM

Question 7

covers the entire skeletal muscle

Answer 7

EPIMYSIUM

Question 8

on the outside of the epimysium

Answer 8

FASCIA

Question 9

found only on the walls of heart

Answer 9

CARDIAC MUSCLE

Question 10

branching cells joined by gap junctions

Answer 10

INTERCALATED DISCS

Question 11

mainly in the walls of hollow visceral organs

Answer 11

SMOOTH MUSCLE

Question 12

specialized plasma membrane

Answer 12

SARCOLEMMA

Question 13

long organelles inside muscle cell

Answer 13

MYOFIBRILS

Question 14

light band

Answer 14

l band

Question 15

dark band

Answer 15

A band

Question 16

midline interruption

Answer 16

Z LINE

Question 17

lighter central area

Answer 17

H ZONE

Question 18

center of H zone

Answer 18

M LINE

Question 19

contractile unit of a muscle fiber

Answer 19

SARCOMERE

Question 20

thick filaments, composed of the protein myosin

Answer 20

MYOSIN FILAMENTS

Question 21

thin filaments, composed of the contractile protein actin

Answer 21

ACTIN FILAMENTS

Question 22

specialized smooth endoplasmic reticulum

Answer 22

SARCOPLASMIC RETICULUM

Question 23

4 MAJOR FUNCTIONAL PROPRIETIES

Answer 23

CONTRACTILITY

EXCITABILITY / IRRITABILITY

EXTENSIBILITY

ELASTICITY

Question 24

the ability of the muscle to shorten forcefully or contract

Answer 24

CONTRACTILITY

Question 25

the capacity of muscles to respond to an electrical stimulus

Answer 25

EXCITABILITY / IRRITABILITY

Question 26

means a muscle can be stretched beyond its normal resting length and still be able to contract

Answer 26

EXTENSIBILITY

Question 27

the ability of muscle to spring back to its original resting length after it has been stretched

Answer 27

ELASTICITY

Question 28

gap between nerve and muscle filled with interstitial fluid

Answer 28

SYNAPTIC CLEFT

Question 29

contract to its fullest when stimulated adequately.

Answer 29

GRADED RESPONSE

Question 30

Graded responses can be produced in two ways

Answer 30

changing the frequency of muscle stimulation changing the number of muscle cells being stimulated at one time

Question 31

single, brief, jerky contraction

Answer 31

MUSCLE TWITCH

Question 32

in most types of muscle activity, nerve impulses are delivered at a rapid rate

Answer 32

SUMMING OF CONTRACTIONS

Question 33

muscle contractions get stronger and smoother

Answer 33

UNFUSED TETANUS

Question 34

muscle is stimulated so rapidly that no evidence of relaxation is seen

Answer 34

FUSED TETANUS

Question 35

the only energy source that can be used to directly power muscle contraction

Answer 35

ATP

Question 36

Three pathways to regenerate ATP

Answer 36

1. Direct phosphorylation of ADP by creatine phosphate 2. Aerobic pathway 3. Anaerobic glycolysis and lactic acid formation

Question 37

supplies ATP at rest and during light/moderate exercise

Answer 37

AEROBIC RESPIRATION

Question 38

reaction that breaks down glucose without oxygen

Answer 38

ANAEROBIC GLYCOLYSIS / LACTIC ACID FORMATION

Question 39

TYPES OF MUSCLE CONTRACTIONS

Answer 39

ISOTONIC CONTRACTION ISOMETRIC CONTRACTION

Question 40

myofilaments are able to slide past each other during contractions the muscle shortens, and movement occurs

Answer 40

ISOTONIC CONTRACTION

Question 41

muscle filaments are trying to slide, but the muscle is pitted against an immovable object

Answer 41

ISOMETRIC CONTRACTION

Question 42

results from the production of antibodies that bind to acetylcholine receptors,

Answer 42

MYASTHENIA GRAVIS

Question 43

MUSCLE FUNCTIONS

Answer 43

Movement of the body Maintenance of posture Respiration Production of body heat Communication Construction of organs and vessels Contraction of the heart