Skeletal Muscles

Question 1

what are the types of muscles?

Answer 1

• smooth muscles
• cardiac muscles
• skeletal muscles

Question 2

how do muscles act?

Answer 2

• in antagonistic pairs
  –> contracting muscle is the agonist
  –> relaxing muscle is the antagonist

Question 3

what are myosin filaments?

Answer 3

• have globular heads that are hinged, so move back and forth
• each myosin head has a binding site for actin and a binding site for ATP

Question 4

what are actin filaments?

Answer 4

• have binding sites for myosin heads
• actin-myosin binding sites
• tropomyosin is found between actin filaments