Which of the following statements are correct? (more than one can be correct) In

Question

Which of the following statements are correct? (more than one can be correct) In vivo, wave summation is achieved by the nervous system increasing firing rate of motor neurons. In vivo, motor unit recruitment is caused by neural activation of increasingly large numbers of motor units serving the muscle. In vitro, wave summation is achieved by the nervous system increasing firing rate of motor neurons. In vitro, motor unit recruitment is caused by neural activation of increasingly large numbers of motor units serving the muscle.

Explanation / Answer

1 or 3 are same and 2 or 4 are same.So, all the statments are correct.
In Vivo, Wave Summation Is Achieved By The Nervous System Increasing Firing Rate Of Motor Neurons.
In Vivo, Motor Unit Recruitment Is Caused By Neural Activation Of Increasingly Large Numbers Of Motor Units Serving The Muscle.

The final strength of any muscle contraction is determined by two factors. The first is the firing rate of the motor units involved, while the second relates to the number and types of units included in the contraction. Which increases the firing rate of an individual motor unit will increase the final strength of contraction. The firing rate of a neuron depends on the level to which its central excitatory state which exceeds the excitation threshold .Motor units of muscles are greatly used because of their low excitation thresholds, which produce high firing rates in their motor neurons. SO, muscles have clearly had to compromise between contractile speed and power and the need to resist fatigue, which chooses as the more important feature for their particular role.

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.