Question

which of the following is a key difference between the nervous system and the endocrine system?

the nervous system primarily acts on distant target cells, while the endocrine system primarily acts on nearby cells.

the nervous system regulates long - term physiological processes, while the endocrine system regulates immediate responses.

the nervous system uses electrical signals, while the endocrine system uses chemical signals.

the endocrine system responds faster than the nervous system.

the endocrine system is responsible for motor control, while the nervous system regulates hormone secretion.

Explanation:

• The nervous system transmits electrical signals (action potentials) along neurons.
• The endocrine system releases hormones (chemical signals) into the bloodstream.
• Let's analyze each option:
• Option 1: Incorrect. The endocrine system acts on distant target cells (via hormones in blood), while the nervous system can act on nearby (synaptic transmission) or specific targets.
• Option 2: Incorrect. The endocrine system regulates long - term processes (e.g., growth, metabolism over time), and the nervous system regulates immediate responses (e.g., reflexes).
• Option 3: Correct. Nervous system - electrical signals (action potentials); Endocrine system - chemical signals (hormones).
• Option 4: Incorrect. The nervous system responds faster (milliseconds) compared to the endocrine system (seconds to days).
• Option 5: Incorrect. The nervous system is involved in motor control, and the endocrine system regulates hormone secretion.

Answer:

The nervous system uses electrical signals, while the endocrine system uses chemical signals.