Muscles

Question 1

Muscles

Answer 1

Can only pull, act antagonistically

Question 2

Ligaments

Answer 2

Attach bones to bones

Question 3

Tendons

Answer 3

Attach bones to muscles

Question 4

Agonist

Answer 4

Contract

Question 5

Antagonist

Answer 5

Relaxing

Question 6

Muscle character

Answer 6

Lots of mitochondria
Lots of muscle fibres
Lots of myofibrils

Question 7

Multinucleate

Answer 7

Many nuclei

Question 8

Actin

Answer 8

Thin light I band, no overlap

Question 9

Myosin

Answer 9

Thick, dark, A band

Question 10

Relaxed muscle

Answer 10

The actiyosin biding site is blocked by tropomysin, his prevent an actinmyosin bridge being formed

Question 11

Contracting muscle

Answer 11

Ca+ cause tropomyosin to move out of the binding site, allows actinmyosin bridge to form, Ca+ also activates ATPase

Question 12

How is ATP used in the sliding filament theory

Answer 12

Change shape of the myosin head, detach myosin head, return myosin head to starting position, Reabsorb Ca+ into sarcoplasmic reticulim

Question 13

When a sarcomere contracts

Answer 13

Sarcomere- shorter
A band- same
I band- shorter
H- zone shorter

Question 14

Phosphocreatine (pcr)

Answer 14

Phosphate group adds ADP-ATP, cells store pcr, short simple reaction, pcr stores used up quickly-1) high intensity 2) short diffusion, anaerobic, alactic

Question 15

Anaerobic respiration

Answer 15

2 ATP made by glycolysis, lactate, short diffusion, high intensity

Question 16

Aerobic respiration

Answer 16

Lots of ATP mostly oxidative phosphorylation, slow, many reactions, alactate

Question 17

Slow twitch muscle fibres

Answer 17

Contract slowly, relax slowly, low force of contraction, aerobic, lots of mitochondria/ blood vessels/ myoglobin, low intensity, long duration

Question 18

Fast twitch muscle fibres

Answer 18

Contract quickly, relax quickly, high force of contraction, non resistant to fatigue, few mitochondria/blood vessels/ myoglobin, high intensity, short duration