Question

True or false: Cell membranes only provide structural support for the cell.

True or false: Cell membranes regulate which substances can enter and exit the cell.

True or false: Cell membranes allow water and water-soluble substances to enter the cell.​

Answer 1

Answer:

1) false

2) true

3) true

Answer 2

Answer:

True,True,False

Explanation:

• Every cell in the body is enclosed by a cell (Plasma) membrane. ... Proteins in the cell membrane provide structural support, form channels for passage of materials, act as receptor sites, function as carrier molecules, and provide identification markers.
• The cell membrane is the outer layer of the cell. The primary function of the cell membrane is to regulate what substances enter and leave the cell. The cell membrane is selectively permeable, or "semi-permeable", meaning that the membrane only allows certain substances to enter or leave the cell.Apr 29, 2020
• Most water-soluble molecules, such as ions (Na+, K+, Ca++), amino acids, monosaccharides, cannot move through the plasma membrane. These molecules can diffuse across only with the aid of two types of transport proteins - channel proteins and carrier proteins. This process is called facilitated diffusion