Transport in animals B9

Question 1

Artery

Answer 1

Moves away from the heart

Question 2

Vein

Answer 2

Moves towards the heart

Question 3

Capillary

Answer 3

Where artery and vein meet (tiny vessels allows diffusion)

Question 4

2 advantages of the couble circulatory system:

Answer 4

• more pressure by the heart to ensure the bllod reaches the body tissues
• active organs (brain, muslces) need more oxygen delivered quickly and efficiently
  DOUBLE IS MORE EFFECTIVE THAN SINGLE

Question 5

what happens when you exercise? (5)

Answer 5

• heart rate increases
• sweating (dehydration, release salt and water through pores)
• tiredness/dizziness
• body temp increases
• skin turns red

Question 6

Factors leading to coronary heart disease (6)

Answer 6

• weight/diet
• genes
• age (blood vessels weaken with age)
• gender
• stress
• smoking (or other substance abuse)

Question 7

White blood cells specific mechanism (B9)

Answer 7

antibodies or phagocytocis:
antibodies (made by lymphocyte) mark the foreign material by attaching to it, phagocyte engulfs and destroys the pathogen
Lymphocite and phagocyte are btoh types of white blood cells

Question 8

Platelets function

Answer 8

Important for the formation of blood clots and important in injury

Question 9

Plasma (4)

Answer 9

• rest of the blood that contains everything else
• mostly water
• substances dissolved in it: ions, soluable nutrient, hormones, CO2
• transport of red blood cells, white blood cells and platelets