Skeletal Muscles

Question 1

What is a muscle

Answer 1

Effector organ that responds to nervous stimulation by contraction

Question 2

What is a ligament

Answer 2

Connect bone to bone

Question 3

What are tendons

Answer 3

Connect bone to muscle

Question 4

What are muscles said to be

Answer 4

Antagonistic

Question 5

Define antagonistic

Answer 5

Effect of each muscle is opposite of the other

Question 6

What is the skeletal muscles structure

Answer 6

• made up of many myofibrils which are divided into contractual units called sacromere
• sarcoplasm contains sarcoplasmic reticulum
• muscles fibres fused together to share nuclei and sarcoplasm
• myosin and actin filaments overlaps strengthening the muscles

Question 7

What are the divisions of a skeletal muscle

Answer 7

Muscle tissues —> bundles of muscles —> fibre —> single muscle fibres — > myofibrils — > sacromere

Question 8

What happens to H band during contraction

Answer 8

Decreases

Question 9

What happened to i band during contraction

Answer 9

Decreases

Question 10

What happens to A band during muscle contractions

Answer 10

Stay the same

Question 11

What happens to Z discs during contraction

Answer 11

Closer together

Question 12

3 types of muscles and where hey are found

Answer 12

Cardiac found in the heart
Skeletal found in walls of gut and blood vessels
Smooth attached to our bones under volunteers control

Question 13

Describe A band

Answer 13

Very dark as they consit of very dark /