Question 22

Normal human nerve cells detect stimuli such as light and heat.

Normal human nerve cells, or neurons, are specialized cells that play a critical role in the nervous system by detecting various stimuli, including light and heat, and transmitting signals throughout the body.

A) They detect stimuli such as light and heat.

This statement is correct as neurons are equipped with receptors that can sense environmental changes, such as light and heat, allowing them to respond appropriately and relay information to the brain for processing.

B) They transmit genetic information to the next generation.

This statement is incorrect. While nerve cells may carry genetic information within their DNA, they do not play a direct role in the transmission of genetic information to the next generation, which is primarily the function of reproductive cells (gametes).

C) They are interchangeable with one another in function.

This statement is incorrect. Different types of neurons have specialized functions and are not interchangeable. For example, sensory neurons are designed to detect stimuli, while motor neurons are responsible for initiating movement.

D) They generate force for locomotion.

This statement is also incorrect. Nerve cells themselves do not generate force; instead, they transmit signals that can lead to muscle contractions, which produce the force necessary for locomotion.

Conclusion

The correct answer, A, highlights the primary function of normal human nerve cells in detecting stimuli. The other options fail because they misrepresent the roles of nerve cells, either conflating them with other cell types or misunderstanding their specific functions within the nervous system.