Cell Transport

What is passive transport?

• A process that requires energy

• A process that happens automatically with no energy required

• A process that moves particles from high to low concentration

• A process that moves particles from low to high concentration

Answer explanation

Passive transport is a process that happens automatically without the need for energy input. It allows particles to move naturally from an area of high concentration to an area of low concentration, following the concentration gradient. This is in contrast to active transport, which requires energy to move particles against the concentration gradient.

Tags

LS 2e

What is diffusion?

• A process that requires energy

• A process that happens automatically with no energy required

• A process that moves particles from high to low concentration

• A process that moves particles from low to high concentration

Answer explanation

Diffusion is a process that moves particles from areas of high concentration to areas of low concentration. It occurs spontaneously and does not require any energy input. This natural movement of particles helps in achieving equilibrium in a system, where the concentration of particles becomes uniform throughout.

What is active transport?

• A process that requires energy

• A process that happens automatically with no energy required

• A process that moves particles from high to low concentration

• A process that moves particles from low to high concentration

Answer explanation

Active transport is a process that requires energy to move particles across a cell membrane. It is different from passive transport, which happens automatically with no energy required. Active transport moves particles from low to high concentration, against the concentration gradient, thus requiring energy input.

Why would a cell need to move particles from low to high concentration?

• To conserve energy

• To maintain equilibrium

• To assist in particle movement

• To allow certain cells to function properly

Answer explanation

A cell needs to move particles from low to high concentration to allow certain cells to function properly. This process, called active transport, is essential for maintaining the correct internal environment and ensuring the proper functioning of cells, such as in the case of nerve cells and nutrient absorption.

Where is active transport commonly observed?

• In heart muscle cells

• In all types of cells

• In plant cells

• In animal cells

Answer explanation

Active transport is a process that is observed in all types of cells, not just heart muscle cells. It is a cellular process that moves ions, molecules, and other substances across cell membranes. However, the answer provided is 'In heart muscle cells', which is a specific example of where active transport can occur, but it is not the only place where it is observed.