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

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

Question 14

anaerobic respiration

Answer 14

absense of oxygen-limited ATP-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)