Muscles Short Answer

Question 1

Identity the three types of muscle tissue

Answer 1

1) Skeletal
2) Cardiac
3) Smooth

Question 2

Understand the basic structure of a sarcomere

Answer 2

A sarcomere is the basic contractile units of muscle fibers, composed of thick (myosin) and thin (actin) filament, with Z-discs marking the boundaries. The arrangements of these filaments allows for muscles contraction through sliding filament theory.

Question 3

1 Phases of Muscle Contraction

Answer 3

Latent Phase: The time between stimulus and the beginning of contractions.

Question 4

2 Phases of Muscle Contraction

Answer 4

Contraction Phase: The period when muscle fibers shortens and tensions increases

Question 5

3 Phases of Muscle Contraction

Answer 5

Relaxation Phase: The muscles returns to its resting state after contraction

Question 6

Discuss metabolism during muscles contraction

Answer 6

ATP is the primarily energy source for muscle contraction , generated through aerobic respiration (using oxygen) and anaerobic metabolism (without oxygen). Creatine phosphate can quickly regenerate ATP during short burst of activity.

Question 7

Explains the role of lactic acid

Answer 7

During intense exercise, when oxygen is scarce, lactic acid is produced as a by product of anaerobic respiration, which can lead to muscle fatigue