muscles

Question 1

antagonistic pairs

Answer 1

flexors vs extensors

• Biceps (flex) Triceps (extensor)
• Hamstrings and quadriceps

Question 2

tendons

Answer 2

connect bone to muscle

Question 3

ligaments

Answer 3

bone to bone

Question 4

sarcolemma

Answer 4

muscle cell membrane

Question 5

sarcoplasm

Answer 5

cytoplasm

Question 6

microfibril

Answer 6

actin filaments and myosin filaments

-thin and thick

Question 7

tropomyosin

Answer 7

strand around actin

Question 8

troponin

Answer 8

keeps tropomyosin in place (over the actin binding sites)

Question 9

ATP effect on myosin

Answer 9

keeps it from contracting and bonding to the actin

-

Question 10

Sarcoplasmic reticulum

Answer 10

muscle cell specialized endoplasmic reticulum
stores CA2+
–contains a lot of mitochondria

Question 11

building endurance

Answer 11

the body makes more mitochondria for you

Question 12

muscle action

Answer 12

nerve impulse causes release of acetylcholine

• taken by receptor proteins
• makes a nerve signal goes dow t tubules
• makes CA2+ release

Question 13

ratchet system

Answer 13

fiber filament model

-the fibers move back and forth

Question 14

acetylcholinesterase

Answer 14

breaks down acetylcholine to prevent nerve impulse from stimulating muscle fiber

• Ca2+ moves callus back to SR and
• muscle stops contracting

Question 15

slow twitch

Answer 15

-contract slowly and keep going for long times
-dark meat (migratory birds) ===more blood vessels
-long distance runner
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Question 16

fast twitch muscle fibers

Answer 16

contract quickly but get tired rapidly

• store more glycogen for anaerobic respiration
• sprinters and white meat

Question 17

muscle fatigue

Answer 17

lack of sugar

• lack of tap to restore Ca2+ gradient (no muscle contraction)
• low o2
• losso f acetylcholine

Question 18

muscle cramps

Answer 18

build up of lactic acid
ATP depletion==can contract
-

Question 19

Rigor Mortis

Answer 19

dead people are stiff

-dead frogs can still twitch