SB8a: Efficient Transport A Exchange

Question 1

Aerobic respiration

Answer 1

A type of respiration in which oxygen is used to release energy from substances such as glucose.

Question 2

Alveolus

Answer 2

A small pocket in the lungs in which gases are exchanged between the air and the blood. (Plural is alveoli.)

Question 3

Capillary

Answer 3

A tiny blood vessel with thin walls to allow for the transfer of substances between the blood and tissues.

Question 4

Circulatory system

Answer 4

The system that moves blood through the body. It consists of the heart, arteries, veins and capillaries.

Question 5

Diffusion

Answer 5

The random movement and spreading of particles. There is a net (overall) diffusion of particles from a region of higher concentration to a region of lower concentration.

Question 6

Excretion

Answer 6

The removal of waste materials that have been produced inside an organism.

Question 7

Gas exchange

Answer 7

A process in which one gas diffuses across a membrane and another gas diffuses in the opposite direction.

Question 8

Metabolism

Answer 8

All the chemical reactions that occur in an organism.

Question 9

Multicellular organism

Answer 9

An organism that is made up of many cells.

Question 10

Surface area : volume (SA : V) ratio

Answer 10

The total amount of surface area of an object divided by its volume. The bigger the ratio, the more surface area something has per unit volume.

Question 11

Urea

Answer 11

A waste product made in the liver from excess amino acids.