Muscle Short Answer

Question 0

Concentric

Answer 0

Muscle shortens and does work- kicking a ball or lifting a book

Question 1

Does not produce active movements, but keeps muscles firm, healthy, and ready to respond to stimulation

Answer 1

Muscle tone

Question 2

Eccentric

Answer 2

Muscle generates force as it lengthens, important for coordination and purposeful movements, more forceful- walking uphill

Question 3

Muscles and aging

Answer 3

Regular exercise helps reverse sarcopenia, even moderate activity can build muscle mass

Question 4

It’s interconnecting tubules surround each myofibril, tubules fuse to form a net of communicating channels

Answer 4

SR

Question 5

Increase the surface area of the sarcolemma for the millions of ACh receptors

Answer 5

Junctional folds

Question 6

Muscle functions

Answer 6

1. Movement
2. Posture/body position
3. Stabilizes joints
4. Generates heat
5. Protects organs

Question 7

How muscles are named

Answer 7

1. Location
2. Size
3. Shape
4. Function
5. Direction of fibers

Question 8

What happens when a sarcomere contracts?

Answer 8

1. Distance between Z discs is shorter
2. H zone disappears
3. A bands move closer together
4. I bands shorten