Neuromuscular Physiology: Linking Nerve Signals To Muscle Action

Neuromuscular Physiology: Linking Nerve Signals To Muscle Action

Question 1. Neuromuscular transmission.
Answer:

• It includes following steps:

Question 2. Isotonic and isometric contraction:
Answer:

1. Isotonic contraction:

• In this type of muscular contraction, the length of the muscle changes while the tension remains constant.
• The muscle is allowed to shorten and lift a load.
• Example: Moving legs in walking.

2. Isometric contraction:

• In this type of muscular contraction, the length of the muscle remains same while the tension is increased.
• Muscle is not allowed to shorten.
• Example: Pulling of any heavy object.

Question 3. Frank starling’s law.
Answer:

• It states that the force of contraction of muscle is directly proportional to its initial length.
• Larger the initial length, greater will be the force of contraction.

Frank starling’s law Lamination:

• As the muscle is stretched the developed tension increases to a maximum and then declines as stretch becomes more extreme.

Frank starling’s law Significance:

• It is applicable to cardiac muscle.
• Thus, it helps to explain the blood ejected by each of the ventricle per heart beat.