Flashcard #3: Cell Membrane & Transport

Front

The diagram reveals that lipids and proteins are both parts of cell membranes. They have different functions because lipids work to hold the cell membrane together, and proteins

Back

move chemical molecules across the cell membrane.

Front

According to the diagram of an animal cell, which numbered structure represents the cell membrane? Options: 1, 2, 3, 4

Back

2

Front

Which cellular process is represented by the diagram of a large molecule moving across a membrane?

Back

active transport

Front

Sweating while hot and shivering while cold are examples of what characteristic of life?

Back

Living things maintain a stable internal environment.

Front

The diagram below shows the movement of material from the inside of a cell to the outside of the cell through a protein channel. What type of cellular transport is occurring?

Back

Passive transport because molecules are moving toward equilibrium

Front

What will happen to red blood cells in a beaker with a saltwater solution with a higher salt concentration than the cells?

Back

The red blood cells will lose water and decrease in size.

Front

Why does active transport require energy to move molecules of a substance across a cell membrane?

Back

The substance moves from low to high concentration, against the concentration gradient.

Front

The movement of water across a semipermeable membrane is called

Back

osmosis

Front

What best describes the function of cell membrane?

Back

It regulates what molecules enter and leave the cell.

Front

The diagram below represents a cell. Carbon dioxide and oxygen can passively diffuse across the cell membrane. Based on the distribution of these molecules inside and outside the cell, what will most likely happen after a certain amount of time?

• The concentration of CO₂ will remain the same inside the cell.
• The concentration of O2 will remain the same outside the cell.
• The concentration of CO₂ will decrease outside the cell.
• The concentration of O₂ will increase inside the cell.

Back

The concentration of O₂ will increase inside the cell.