Question

1. muscles usually function in pairs, and act with reciprocal inhibition. describe this concept in terms of agonist and antagonist. (pg 291)

Explanation:

Muscles work in pairs where the agonist contracts to produce a movement and the antagonist relaxes (reciprocal inhibition). For example, when the biceps (agonist) contracts to flex the elbow, the triceps (antagonist) relaxes. This coordinated action allows for smooth and controlled movement.

Answer:

Muscles function in pairs with one muscle (agonist) contracting to cause a movement while the opposing muscle (antagonist) relaxes through reciprocal inhibition, enabling smooth movement.