pharm end of book chapter 7.

MULTIPLE RESPONSE Some substances require a channel or pore to enter a cell membrane. which of the following substances use a channel to enter the cell? A. calcium B. urea C. Fat-soluble vitamins D. sodium e. oxygen f. potassium

A. calcium D. sodium f. potassium

A human cell placed in salty seawater will a. burst from water entering the cell B. shrivel and die from water leaving the cell C. not be affected in any way D. break apart from the salt effect

B Shrivel and die from water leaving the cell

MULTIPLE RESPONSE Some substances that will pass into the human cell by simple diffusion, which of the following substances diffuse into the cell. a. Calcium B. Nitrogen C. sodium D. Carbon dioxide e. Oxygen f. Pottasium

B. Nitrogen D. Carbon dioxide e. Oxygen

All cells progress through basically the same cell cycle, including a. two phases B. four active phases and a resting phase c. three periods of rest and a splitting phase D. four active phases.

B. four active phases and a resting phase

MULTIPLE RESPONSE The factors that determine the amount of time that a cell takes to progress through the cell cycle is determined by which of the following a. the acidity of the environment B. the genetic makeup of the cell c. the location of the cell in the body d. the number of ribosomes in the cell e. the cell response to contact inhibition f. the availability of nutrients and oxygen

B. the genetic makeup of the cell e. the cell response to contact inhibition f. the availability of nutrients and oxygen

The basic unit of a structure is a. The mitochondria B. the nucleus C. the nucleolus D. the cell

D. The cell

The saying one rotten apple can spoil the whole barrel can be used to refer to the cell-degrading properties of a. calcium channels B. lysosomes c. histocompatibility receptors d. nuclear spindles

Lysosomes

The cell membrane is composed of a. Phospholipid structure B. Channels of protein C. a cholesterol-based membraned. d. Golgi apparatus

a. Phospholipid structure

The sodium-potassium pump maintains a negative charge on the cell membrane by a. osmosis B. diffusion C. active transport D. facilitated diffusion

c. Active transport

The ribosomes are important sites for a. digestion of nutrients B. excretion of water products c. production of proteins D. hormone receptors

c. production of proteins