An outside source of energy (atp) is required for

Diffusion is the equaling of a concentration of a substance in a certain medium.  The general trend is for an area where the substance is highly concentrated to spread to areas that are low in concentration.  A good example here would be the striking of a match in one corner of a room; within a few minutes, the match can be smelt everywhere in the room.  No energy is required to go from a high concentration to a lower one.

Osmosis is, quite simply, diffusion by water.  Water is one of the substances a cell membrane will allow free passage back and forth across it.  Again, the tendency is for the water concentration in a greater area to diffuse into an area with a lower concentration.  Again, no energy is required.

Passive transport involves the passage of larger molecules across the cell membrane, through special portal cells.  As the name implies, no energy is required for particles of a higher concentration to pass through the cell membrane into an area that contains a lower concentration.

Active transport is the process that requires energy, because we are going against the grain, moving particles from a low concentration into an area already having a high concentration.  This is against the natural tendency of moving from high to low, therefore it requires the cell to expend energy, stored in the form of ATP.

1: the largest region of the brain is the:

  cerebrum

2. the term "psychology" literally means:

the process or procedure of the science or study of the mind.

3. the area of the brain responsible for respiration, heart rate, and smooth muscle control of our blood vessels is t

medulla oblongata

4. the structure that conducts nerve impulses to and from the brain and serves as a reflex center for some sensory information without input from the brain is the:

spinal cord

5. the three-layered membrane that covers the brain and spinal cord and literally means membrane is called the:

meninges

6. the cord-like (string-like) structures that carry bio-electrical impulses from one part of the body to another are called

nerves

7. a group of nerve cell bodies that are found outside of the spinal cord and brain are referred to as:

ganglions or ganglia (pl.) “literal meaning knot”

8. the term that means spinal cord inflammation is:

myel/itis

answer; //the above statement is (false);