Question

exam 3 - chapters 10 and 11 nervous syst
what is the expected response to the triceps-jerk reflex?
multiple choice
extension of the forearm
flexion of the forearm
flexion of the shoulder
plantar flexion

Explanation:

The triceps - jerk reflex (also known as the triceps reflex) is a deep tendon reflex. When the triceps tendon is tapped, the normal (expected) response is the extension of the forearm. This is because the triceps brachii muscle, which is innervated by the radial nerve, contracts in response to the reflex arc activation, leading to the extension of the forearm at the elbow joint. Flexion of the forearm is associated with the biceps - jerk reflex, flexion of the shoulder is not the response of the triceps - jerk reflex, and plantar flexion is related to the plantar reflex (associated with the lower limb and not the triceps - jerk reflex).

Answer:

Extension of the forearm