muscle and movement

Question 1

what are the 3 major functions os skeletal muscle?

Answer 1

• movement
  -posture
  -heat production

Question 2

what are the 4 main characteristics of skeletal muscle?

Answer 2

1. irritability
2. contractility
3. extensibility
4. elasticity

Question 3

what are the 3 main types of muscle contraction?

Answer 3

1- isometric
2- concentric
3- eccentric

Question 4

what is an isometric conctraction?

Answer 4

-when a muscle generates force and attempts to shorten, but does not overcome the external resistance
-static
-does not produce external work

Question 5

what is a concentric muscle contraction?

Answer 5

• concentric action occurs when the muscle shortens and joint movement occurs as tension develops

Question 6

what is eccentric contraction?

Answer 6

• eccentric action occurs when the external resistance exceeds muscle force and the muscle lengthens while developing tension
• eg controlled lowing

Question 7

what are examples of different types of muscle structure?

Answer 7

• circular muscle
  -convergent muscle
  -multipennate muscle
  -parallel muscle
  -unipennate muscle
• bipennate muscle

Question 8

what is an agonist in terms of muscle movement?

Answer 8

the muscle that generates most of the force to prodyce a movement

Question 9

what is a synergist?

Answer 9

geerates force to help the agonist

Question 10

what is an antagonist?

Answer 10

opposes the movement of the agonist

Question 11

what is the fixator?

Answer 11

the muscle that stabilises the origin of the agonist muscle