2 Muscles

Question 1

What types of muscles can contract and relax independently?

Answer 1

striated muscles, aka skeletal and cardiac

Question 2

List the layers of tissue of a muscle from outermost to innermost

Answer 2

Epimysium, Perimysium, Endomysium, muscle fiber

Question 3

What part of the sarcolemma contains only thin filaments?

Answer 3

I band

Question 4

What part of the sarcolemma contains only thick filaments?

Answer 4

H zone

Question 5

What part of the sarcolemma contains thick filaments linked with accessory proteins such as Titin & Nebulin (holds myofilament in place)

Answer 5

M line

Question 6

At the outer edge of this band (located in the sarcolemma) thick and thin filaments overlap

Answer 6

A band

Question 7

How does calcium play in the contractile process?

Answer 7

During contraction, ca2+ binds to troponin which removes tropomyosin to uncover the myosin-binding site on actin

Question 8

How does tropomyosin play in the contractile process?

Answer 8

During the relaxed state, tropomyosin partially blocks the myosin binding site on actin

Question 9

What’s the difference between isometric and isotonic contraction?

Answer 9

Isometric muscle contract, no movement. Isotonic same force