Jack covers his ears when he hears a loud sound. which statement is correct? 1.jack's peripheral nervous system sends a message to the sense organs to make him respond. 2.jack's brain sends a message to the sensory neurons to make his bones and muscles move. 3.jack's central nervous system instructs his hand muscles to move towards his ears. 4.jack's central nervous system sends impulses through the spinal cord to the brain.

3. Jack's central nervous system instructs his hand muscles to move towards his ears.  

Explanation:

Listening is an exclusive task of the auditory system, but the whole body has the ability to “listen”, absorb sound impacts and react to them. Sound is directly linked to health, capable of promoting well-being, healing, increased performance or, when in excess, irreversibly harming or causing various discomforts.

As we know, the nervous system is formed by a set of organs of the human body that have the function of capturing messages, stimuli of the environment, "interpreting" them, "archiving" them and, consequently, elaborating responses, which can be given in the form of movements, sensations or findings.

Because of this, we can say that in the case shown in the question above, Jack's central nervous system instructs the muscles of his hands to move toward his ears when he heard a very loud noise.

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explanation: