unit 2 - Animal Transport + Absorption

Question 1

give three things which are transported in the blood

Answer 1

oxygen, CO2, nutrients

Question 2

blood is composed of _____?

Answer 2

plasma, platelets, red + white blood cells

Question 3

what is the function of plasma in the blood

Answer 3

liquid component of blood which transports nutrients

Question 4

why do red blood cells have no nucleus?

Answer 4

to provide more space for haemoglobin

Question 5

pathogens are _____?

Answer 5

disease-causing micro-organisms such as viruses, bacteria and fungi

Question 6

lymphocytes are proteins which are ______?

Answer 6

specific to certain pathogens

Question 7

what is the function of the coronary artery

Answer 7

supply the heart muscle with oxygen and glucose

Question 8

describe the structure and function of arteries

Answer 8

thick, muscular walls; narrow central channel; carry blood away from heart under high pressure

Question 9

describe the structure and function of veins

Answer 9

thinner walls; wide central channel; carry blood towards the heart under low pressure; valves to prevent backflow

Question 10

describe the structure and function of capillaries

Answer 10

tiny; thin walls; large surface area

Question 11

oxygen and glucose must ______?

Answer 11

be absorbed in the blood and transported to all cells for respiration

Question 12

waste products and CO2 mus ______?

Answer 12

be removed from cells in the bloodstream

Question 13

tissues contain _____?

Answer 13

networks of capillaries to allow the exchange of materials at cellular level

Question 14

function of lungs

Answer 14

gas exchange organs

Question 15

what is the role of villus and where is it found

Answer 15

absorbs products of digestion, located in the small intestine

Question 16

what materials are absorbed by the capillaries?

Answer 16

amino acids + glucose

Question 17

what materials are absorbed by the lacteal?

Answer 17

fatty acids + glycerol