Question

which of these pairings is incorrect?

• blood cells, components of blood
• neurons, conduct electrical impulses
• epithelial cells, react to stimuli
• muscle cells, elongated cells that can contract

Explanation:

• Blood cells are indeed components of blood (red, white, platelets).
• Neurons are specialized to conduct electrical impulses.
• Epithelial cells mainly function in protection, secretion, absorption, etc., and reacting to stimuli is a function of neurons or other specialized cells like sensory cells, not epithelial cells.
• Muscle cells are elongated and can contract for movement.

Answer:

C. epithelial cells, react to stimuli