Homeostasis And Cell Process

Question 1

the maintenance of a constant internal state in a changing environment is what?

Answer 1

Homeostasis.

Question 2

Homeostasis ensures that cells can obtain and use what 4 things?

Answer 2

energy, make new cells, exchange materials, and eliminate wastes in a changing environment.

Question 3

What organisms exchange materials directly with the environment?

Answer 3

Unicelular organisms.

Question 4

What organisms have systems that transport materials to cells from other places within the organism?

Answer 4

Multicellular

Question 5

What is the transport system in humans?

Answer 5

Cardiovascular system.

Question 6

What are the transport system in plants?

Answer 6

Xylem and phloem.

Question 7

Cells get energy by doing what?

Answer 7

Breaking down materials.

Question 8

Plants, algae, and some bacteria make their own food by a process called what?

Answer 8

Photosynthesis.

Question 9

For photosynthesis, in the presence of sunlight, what two things are converted to sugar and oxygen?

Answer 9

Carbon dioxide and water.

Question 10

Plants and animals use oxygen during what to produce energy from food?

Answer 10

Cellular respiration.

Question 11

Sugars and oxygen are converted to what during cellular respiration?

Answer 11

Water, carbon dioxide, and energy.

Question 12

What and what are linked because each process depends on the products of the other?

Answer 12

Photosynthesis and cellular respiration.

Question 13

Cells do what at different rates for different reason?

Answer 13

Grow, divide, and die

Question 14

In eukaryotes, DNA is copied before a cell can do what?

Answer 14

Divide.

Question 15

What is cell division that forms two new nuclei that are identical to each other?

Answer 15

Mitosis.

Question 16

Cell membranes are what, allowing only certain particles to move into or out of the cell?

Answer 16

Semi-permeable.

Question 17

The movement of materials across a cell membrane without the use of energy is called what?

Answer 17

Passive transport

Question 18

What is the movement of molecules from high concentrations to low concentrations?

Answer 18

Diffusion.

Question 19

(What) is the diffusion of water through a semi-permeable membrane?

Answer 19

Osmosis.

Question 20

Large molecules move into and out of cells through what?

Answer 20

Protein channels.

Question 21

What is the movement of particles against a concentration gradient and requires energy?

Answer 21

Active transport.

Question 22

What and what are forms of active transport that move large particles into and out of cells?

Answer 22

Endocytosis and exocytosis.

Question 23

What is a process by which a cell uses energy to surround and enclose a particle in a vesicle to bring the particle into the cell?

Answer 23

Endocytosis.

Question 24

What is a process by which particles are enclosed in a vesicle in a cell and released from the cell?

Answer 24

Exocytosis.