ch 10 pt 2 anatomy

Question 1

What is thin filaments?

Answer 1

Actin proteins and allow muscle to shorten and generate force.

Question 2

What are thick filaments?

Answer 2

Myosin protein molecules and plays a crucial role in muscle contraction.

Question 3

What is tendon tissues?

Answer 3

Cordlike structure of dense regular CT

Question 4

What is aponeurosis tissue?

Answer 4

Thin, flattened sheet of dense irregular tissue; skull

Question 5

What is deep fascia?

Answer 5

Separates individual muscles; binds muscles with similar function

Question 6

What is superficial fascia?

Answer 6

Separates muscle from skin

Question 7

What does skeletal muscle contain?

Answer 7

Vascularized and innervated by somatic neurons

Question 8

What is sarcoplasm?

Answer 8

Cytoplasm and contractile proteins

Question 9

What is sarcolemma?

Answer 9

Plasma membrane, t-tubules that extend deep into cell; voltage-sensitive calcium channels respond to ATP

Question 10

Breakdown of the muscle

Answer 10

Muscle, fascicle, muscle fiber, myofibril, myofilaments

Question 11

What is sarcomeres?

Answer 11

Myofilaments arranged in repeating units

Question 12

What are A bands?

Answer 12

Dark-appearing region in both filaments

Question 13

What are I band?

Answer 13

Light-appearing region in thin filaments and bisected by Z discs

Question 14

What is H zone?

Answer 14

Central portion of A band only thick filaments

Question 15

What is M line?

Answer 15

Middle of H zone; protein meshwork structure; attachment site for tick filaments

Question 16

What 2 parts of a sarcomere disappear with maximal muscle contraction?

Answer 16

I bands and H zone