Question

If the first stimulus results in 9 grams of muscle tension, a second, successive stimulus of the same strength will result in greater than 9 grams of tension. True or false

Answer 1

A second stimulus of the same strength will result in greater than 9 grams of muscle tension.

Step-by-step explanation:

The question is asking whether a second stimulus of the same strength will result in tension greater than 9 grams. The answer is true. When the frequency of motor neuron signaling increases, the muscle goes through a process called wave summation, where the tension produced by the muscle increases. This results in a stronger contraction and therefore greater muscle tension. The release of more Ca++ ions triggers the activation of additional sarcomeres, leading to a greater contraction of the motor unit.