Chapter 5 practical cell bio- 2nd semester exam review

As a result of diffusion, the concentration of many types of substances_______ the membrane.

• always remains greater inside

• eventually becomes balanced on both sides

• always remains greater outside

Diffusion moves substances _________

• only through a lipid bilayer membrane

• only in liquids

• from an area of high concentration to an area of low concentration

Which of the following does NOT expend energy?

• diffusion

• endocytosis

• active transport

The process by which water passes into or out of a cell is called __________

• solubility

• osmosis

• selective transport

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

• osmosis

• endocytosis

• lipid carriers

Which of the following is NOT a characteristic of facilitated diffusion ?

• it requires a carrier protein

• it moves a substance against a concentration gradient

• it requires no energy input

Which of the following does NOT expend energy ?

• diffusion

• active transport

• endocytosis

A calcium ion channel will allow _______

• any kind of ion to pass through it

• only calcium ions to pass through it

• positive ions to pass through it

The sodium- potassium pump is a form of _______transport

• passive

• active

• facilitated

The sodium- potassium pump usually pumps _________

• potassium out of the cell

• sodium into the cell

• potassium into the cell