Question

the __ is responsible for maintaining homeostasis within any cell. a cell wall b cell membrane c endoplasmic reticulum a membrane that only “lets” certain molecules in while keeping other molecules out is a flexible b lipid layers c selectively permeable large molecules and wastes move through the membrane through __ a lipid layers b protein channels c carbohydrate gates

Explanation:

1. The cell membrane regulates what enters and leaves the cell, maintaining homeostasis. The cell wall provides structural support and protection, and the endoplasmic reticulum is involved in protein and lipid synthesis.
2. A selectively permeable membrane allows certain molecules to pass through while blocking others. Flexibility and lipid - layers are not the terms that describe this property.
3. Large molecules and wastes move through the membrane via protein channels. Lipid layers are mainly for the passage of small, non - polar molecules, and carbohydrate gates are not the main way for large molecules and wastes to pass through.

Answer:

1. B. cell membrane
2. C. selectively permeable
3. B. protein channels