Friedman- 3 Muscular - Sheet1

Question 1

Function of muscular system

Answer 1

Production of movement, maintaining posture, stabilization of joints, heat generation

Question 2

type of muscle

Answer 2

skeletal, smooth, cardiac

Question 3

skeletal

Answer 3

Voluntary movement, connected to bone, multinucleated

Question 4

Smooth

Answer 4

no striation, involuntary movement, found in stomach-intestine-bladder-respiratory passage. movement is slow and sustained.

Question 5

Cardiac

Answer 5

Found only in heart, striated, involuntary movement, contain intercaleted discs

Question 6

Intercalated discs (cardiac)

Answer 6

Proteins that connect two muscle cells together, provide strength for repetitive motion

Question 7

Skeletal (microscopic)

Answer 7

striation: light/dark pattern. structures present inside the muscle cells known as srcomere

Question 8

Sarcomere

Answer 8

thick filament (myosin) thin filament (actin)

Question 9

skeletal (activity)

Answer 9

contraction requires nerve impulse

Question 10

neuromuscular junction

Answer 10

axon terminal connected to sarcolemma of muscle (space between nerve ending/axon terminal & muscle fiber)

Question 11

nerve impulse (skeletal muscle contraction)

Answer 11

Neuromuscular junction-release of neurotransmitter Ach- Na+/K+ channels open-opening of calcium channels-lead to muscle contraction

Question 12

all or none law

Answer 12

one muscle cell is fully contracted when stimulated

Question 13

aerobic respiration

Answer 13

presence of oxygen-lots of ATP (32 ATP per glucose)

Question 14

anaerobic respiration

Answer 14

absense of oxygen-limited ATP(2 ATP per glucose) -lactic acid

Question 15

aerobic endurance

Answer 15

exercise: jogging, biking, etc..

Question 16

striation

Answer 16

light/dark pattern

Question 17

fibril

Answer 17

organiuzed protein structure inside of muscle fiber

Question 18

A band

Answer 18

Dark portion of striation where thick and thin filaments overlap

Question 19

I band

Answer 19

light port of the striation where only actin is present

Question 20

M line

Answer 20

support beam for actin (thick filament)

Question 21

Z line

Answer 21

support beam for myosin (thin filament)

Question 22

neurotransmitter

Answer 22

chemical signal that allows one nerve to interact with another nerve/muscle fiber

Question 23

axon terminal

Answer 23

nerve endings/contains neurotransmitters

Question 24

Channels/openings on skeletal muscle

Answer 24

Na+ & K+

Question 25

Action potential

Answer 25

changing voltage of cell - leads to release of calcium from within cell

Question 26

Ach

Answer 26

neurotransmitter acetylcholine that leads to muscle contraction

Question 27

steps of contraction

Answer 27

Ach cause opening of Na+ & K+ channels > creates action potential > release of calcium from within cell > direct effect of sarcomere > muscle contraction

Question 28

normal activity

Answer 28

increase of mitochondria

Question 29

lack of activity

Answer 29

decrease in mitochondria

Question 30

high activity

Answer 30

DRASTIC increase of mitochondria