Question

the process of changing complex food molecules into simpler molecules is called: cell respiration chemical digestion mechanical digestion energy digestion question 10 1 pts na+ and k+ are minerals that are important in the function of nerves and bones blood muscles hormones

Explanation:

• For the first question: Chemical digestion involves the breakdown of complex food molecules (like proteins, carbohydrates, and fats) into simpler molecules (e.g., amino acids, simple sugars, fatty acids and glycerol) through the action of enzymes. Cell respiration is the process by which cells break down glucose to produce ATP. Mechanical digestion is the physical breakdown of food (e.g., chewing). "Energy digestion" is not a standard biological term.
• For the second question: \(Na^{+}\) (sodium ions) and \(K^{+}\) (potassium ions) are crucial for the generation and propagation of nerve impulses (action potentials). They are also important for muscle contraction. Sodium - potassium pumps in muscle and nerve cells maintain the proper ion gradients. Bones mainly rely on calcium and phosphorus. Blood has various components, but sodium and potassium's key role in the context of the question is related to muscle and nerve function. Hormones are chemical messengers (e.g., insulin, estrogen) and not directly related to the ion - based function of nerves and the option related to muscles here.

Answer:

• First question: chemical digestion
• Second question: muscles