Chapter 24, Problem 113A

Interpretation Introduction

Interpretation : Cells are able to selectively absorb certain ions and molecules while excluding other materials is to be explained.

Concept Introduction : The fundamental units of all living things are cells. There are many billions of cells in the human body.

Answer to Problem 113A

Cells are able to selectively absorb certain ions and molecules because of it semipermeable membrane.

Explanation of Solution

All cells have a cell membrane, also known as a plasma membrane, which separates the interior of the cell from the external environment.

A semipermeable lipid bilayer makes up the cell membrane.

The movement of materials into and out of the cell is controlled by the cell membrane.

The transport of substances into and out of cells is regulated by the cell membrane, which is selectively permeable to ions and organic molecules.

The cell membrane's primary job is to shield the cell from its environment.

It is made up of a phospholipid bilayer with proteins incorporated into it.

Selective permeability, also known as semi-permeability, is the capacity of the cell to permit just specific molecules to enter or exit.