Question

which component of plasma allows for cell membrane potentials and muscle contractions? a nutrients b wastes c gases d electrolytes

Explanation:

To determine the correct answer, we analyze each option:

• Option A: Nutrients in plasma are mainly for energy and building materials, not for membrane potentials or muscle contractions.
• Option B: Wastes in plasma are for removal from the body, not related to these functions.
• Option C: Gases (like O₂ and CO₂) in plasma are for respiration, not for membrane potentials or muscle contractions.
• Option D: Electrolytes (ions like Na⁺, K⁺, Ca²⁺) in plasma are crucial for maintaining cell membrane potentials (via ion gradients) and muscle contractions (e.g., Ca²⁺ for muscle fiber activation).

Answer:

D. Electrolytes