Cell Transport: Energy Dynamics and Mechanisms in Biology

Cell transport involves moving substances across the cell membrane, categorized into passive and active transport. Passive transport, like diffusion, occurs without energy, moving particles from high to low concentration. Active transport requires energy to move particles against the concentration gradient, from low to high concentration, as seen in heart muscle cells. Key points include passive transport's energy-free nature and active transport's energy requirement.

What is the main characteristic of passive transport?

• It requires energy input.

• It moves particles from low to high concentration.

• It occurs automatically without energy.

• It involves protein pumps.

Which process is an example of passive transport?

• Exocytosis

• Endocytosis

• Diffusion

• Osmosis

What is required for active transport to occur?

• Equal concentration gradient

• Energy input

• Passive diffusion

• No energy

In active transport, particles move from:

• High to low concentration

• Low to high concentration

• Equal concentration

• No movement

Why is active transport important in heart muscle cells?

• To maintain a constant temperature

• To allow the heart to beat

• To store energy

• To prevent diffusion

What is the key difference between passive and active transport?

• Passive transport requires energy, active does not.

• Active transport requires energy, passive does not.

• Both require energy.

• Neither requires energy.