Chapter 4 Biology

Refer to the Illustration above. ( Object resolves) The process shown is called

Diffusion

The dispersal of ink in a beaker of water is an example of

Diffusion

Which of the following does not require energy

Diffusion

A cell placed in a strong salt solution would probably burst because of osmosis.

False

Diffusion is an active process that requires a cell to expand a great deal of energy.

False

During diffusion, molecules diffuse from a region where their concentration is low to a region where their concentration is higher, until the particles are evenly dispersed.

False

Exocytosis does not use energy to expel proteins from the cell.

False

Exocytosis is a process that uses vesicles to capture substances and bring them into a cell.

False

In facilitated diffusion, carrier proteins require energy to transport substances across the cell membrane.

False

Osmosis is the diffusion of starch molecules through a selectively permeable membrane.

False

Diffusion is the movement of a substance

From an area of high concentration to an area of low concentration.

The diffusion of water into or out of a cell is called

Osmosis

Which of the following is a form of active transport

Sodium - potassium pump

Exocytosis helps the cell rid itself of wastes.

True

In active transport, energy is required to move a substance across a cell membrane.

True

Membranes are selectively permeable if they allow only certain substances to move across them.

True

Water will defuse out of a cell when the cell is placed in a hypertonic solution.

True

When the concentration of dissolved particles outside a cell is equal to the concentration of dissolved particles inside the cell, the cell solution is isotonic.

True

Molecules that are too large to be moved through the membrane can be transported into the cell by

endocytosis

Molecules that are too large to be moved across a cell membrane can be moved from the cell by

exocytosis

Ridding the cell of materials by discharging the materials in vesicles is called

exocytosis

Sugar molecules cross the cell membrane by

facilitated diffusion

A cell will swell when it is placed in a

hypotonic solution

Osmosis is a type of

passive transport