Luring

Front 1

Which of the following transmit information into a cell by binding to signal molecules?

Back 1

receptor proteins

Front 2

The sodium-potassium pump prevents the accumulation of ____________ ions inside the cell

Back 2

sodium

Front 3

acts as a signal molecule in the cytoplasm

Back 3

signal molecule

Front 4

carries information throughtout the body and to other cells

Back 4

ion channel

Front 5

Ion channel gates close the pores of some ion channels in response to

Back 5

1.stretching of the cell membrane
2.a charge in electrical charge
3.the binding of specific molecules to the channel

Front 6

a protein that binds to a specific signal molecule

Back 6

receptor protein

Front 7

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

Back 7

t

Front 8

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.

Back 8

F

Front 9

Biology 1 Chapter 4
Mr. Luring

Back 9

Cut Apart and Study

ALSO study notes and worksheets from class.

Front 10

Substances always flow from an area of high concentration to an area of __________ concentration

Back 10

low

Front 11

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

Back 11

F

Front 12

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

Back 12

T

Front 13

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

Back 13

osmosis

Front 14

Passive transport uses ATP to move moelcules against their concentration gradient.

Back 14

F

Front 15

The sodium-potassium pump

Back 15

decreases the concentration of sodium ions inside a cell.
increases the concentration of potassium ions inside a cell.

Front 16

Ions move through ion channels by

Back 16

passive transport

Front 17

Signal molecules bind to

Back 17

receptor proteins

Front 18

Sugar molecules cross the cell membrane by

Back 18

facilitated diffusion

Front 19

Osmosis is a type of

Back 19

passive transport

Front 20

If a cell is placed in a(n) ______________solution, water will flow into the cell

Back 20

hypertonic

Front 21

A receptor protein sends signals into a cell by transporting a specific molecule through the cell membrane

Back 21

F

Front 22

The sodium-potassium pump

Back 22

is a carrier protein

Front 23

Transport proteins that allow ions to pass through the cell membrane are called

Back 23

ion channels

Front 24

The sodium-potassium pump usually pumps

Back 24

Potassium ions into the cell

Front 25

The sodium-potassium pump transports sodium ions out of a cell while causing potassium ions to move into the cell

Back 25

T

Front 26

Facilitated diffusion moves molecules and ions against their concentration gradient, while active transport moves molecules and ions down their concentration gradient

Back 26

F

Front 27

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

Back 27

F

Front 28

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

Back 28

exocytosis

Front 29

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

Back 29

T

Front 30

Which of the following is a form of active transport

Back 30

sodium-potassium pump

Front 31

A cell will swell when it is placed in a(n)

Back 31

hypotonic solution

Front 32

A cell does not expend ___________ when diffusion takes place

Back 32

energy

Front 33

In facilitated diffusion, ______________ proteins are used to transport substances down their concentration gradient.

Back 33

carrier

Front 34

The sodium-potassium pump usees energy supplied by

Back 34

ATP

Front 35

The diffusion of ____________ through cell membranes is called osmosis.

Back 35

water

Front 36

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

Back 36

diffusion