MUSCLE PHYSIOLOGY

PHYSIOLOGY

MUSCLE CONTRACTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
When a muscle shortens under tension, it is called ____
A
isotonic eccentric contraction
B
isotonic concentric contraction
C
isometric concentric contraction
D
isometric eccentric contraction
Explanation: 

Detailed explanation-1: -In a concentric contraction, the muscle tension rises to meet the resistance then remains stable as the muscle shortens. During eccentric contraction, the muscle lengthens as the resistance becomes greater than the force the muscle is producing.

Detailed explanation-2: -Concentric contraction occurs when the total length of the muscle shortens as tension is produced. For example, the upward phase of a biceps curl is a concentric contraction.

Detailed explanation-3: -Contractions that involve shortening of the muscle are referred to as isotonic or concentric contractions. This type of contraction occurs when the force generated by the muscle is greater than the constant load acting on the muscle.

Detailed explanation-4: -A concentric contraction is a type of muscle activation that causes tension on your muscle as it shortens. As your muscle shortens, it generates enough force to move an object. This is the most popular type of muscle contraction.

Detailed explanation-5: -Isotonic contractions occur when the muscle changes length, producing limb motion. Concentric contractions occur when the muscle shortens. Eccentric contractions occur when the muscle lengthens. More fast-twitch fibers are recruited during eccentric contractions.

There is 1 question to complete.