Challenge of Life in the Ocean Review

Front

What is simple diffusion?

Back

The movement of molecules from an area of high concentration to an area of low concentration.

Front

What is the function of the cell membrane?

Back

The cell membrane is selectively permeable, controlling what enters and exits the cell.

Front

What does active transport require?

Back

Active transport requires energy (ATP) to move substances against their concentration gradient.

Front

What can active transport help marine organisms do?

Back

Active transport can help the cells of marine organisms pump out excess sodium.

Front

How does salinity affect the viscosity of seawater?

Back

As salinity increases and temperature decreases, the viscosity of seawater increases.

Front

Define osmosis.

Back

Osmosis is the movement of water molecules through a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is the role of ATP in cellular processes?

Back

ATP provides the energy required for various cellular processes, including active transport.

Front

Explain the concept of concentration gradient.

Back

A concentration gradient is the difference in the concentration of a substance across a space, driving the movement of molecules.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy and moves substances along their concentration gradient, while active transport requires energy to move substances against their gradient.

Front

What is the significance of selective permeability in cells?

Back

Selective permeability allows cells to maintain homeostasis by controlling the internal environment and regulating the entry and exit of substances.