Question

human heart cells require a constant release of energy to function continuously. which of these structures would be numerous in such cells to meet this demand?
a) plasma membrane
b) golgi apparatus
c) endoplasmic reticulum
d) mitochondria

Explanation:

To determine the correct structure, we analyze the function of each option:

• Option A (plasma membrane): Mainly involved in regulating the entry and exit of substances, not energy production.
• Option B (Golgi apparatus): Modifies, sorts, and packages proteins and lipids, not energy - related.
• Option C (endoplasmic reticulum): Involved in protein and lipid synthesis, not primary energy production.
• Option D (mitochondria): Known as the "powerhouse of the cell" as it is the site of cellular respiration, which produces ATP (energy) for the cell. Since heart cells need a constant energy supply, mitochondria would be numerous.

Answer:

D. mitochondria