Cell test Concept 2 and 3

Front

What are the three examples of passive transport?

Back

Diffusion, facilitated diffusion, and osmosis.

Front

What is the correct order of organization in a multicellular organism from most basic to most complex?

Back

Neurons (brain cell) → Nerve tissue → Brain → Central nervous system → Human being.

Front

Why is mitosis important for cells in multicellular organisms?

Back

Mitosis produces cells that are identical to the original dividing cell.

Front

Which molecule moves most easily through the phospholipid bilayer?

Back

CO₂.

Front

What is programmed cell death also known as?

Back

Apoptosis.

Front

Define facilitated diffusion.

Back

Facilitated diffusion is the process of passive transport of molecules across a biological membrane via specific transmembrane integral proteins.

Front

What is the role of osmosis in cells?

Back

Osmosis is the movement of water molecules across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What is the function of the phospholipid bilayer in cell membranes?

Back

The phospholipid bilayer acts as a barrier to protect the cell and regulates the movement of substances in and out of the cell.

Front

What is the difference between active and passive transport?

Back

Active transport requires energy to move molecules against their concentration gradient, while passive transport does not require energy and moves molecules along their concentration gradient.

Front

What is the significance of apoptosis during embryonic development?

Back

Apoptosis helps shape the developing organism by removing unnecessary cells, such as webbed fingers in embryos.