How do effectors respond to stimuli?

How do effectors respond to stimuli?

• A. They transmit signals to the brain
• B. They store information
• C. They produce a response
• D. They detect stimuli

Answer: (C)

Effectors respond to stimuli by producing a response. When a stimulus is detected, the nervous system sends commands to an effector, which is typically a muscle or a gland, and the effector carries out an action to bring about a change. Muscles contract to move a part of the body, or glands release substances, to restore balance or remove a threat. The other functions described—transmitting signals to the brain and detecting stimuli—are about sensing and signaling, not the action carried out by the effector itself, and storing information isn’t a role of effectors either. For example, if you touch something hot, receptors detect the heat and the nervous system signals the muscles to contract, pulling the hand away. Thus, the key idea is that effectors produce a response.

Effectors respond to stimuli by producing a response. When a stimulus is detected, the nervous system sends commands to an effector, which is typically a muscle or a gland, and the effector carries out an action to bring about a change. Muscles contract to move a part of the body, or glands release substances, to restore balance or remove a threat. The other functions described—transmitting signals to the brain and detecting stimuli—are about sensing and signaling, not the action carried out by the effector itself, and storing information isn’t a role of effectors either. For example, if you touch something hot, receptors detect the heat and the nervous system signals the muscles to contract, pulling the hand away. Thus, the key idea is that effectors produce a response.