B4: Organising Animals and Plants

Question 1

What is Plasma

Answer 1

Plasma is a yellow liquid that transports waste products like Carbon dioxide and urea

Question 2

What is urea

Answer 2

Urea is excess proteins which transported from the liver to the kidney and is removed by urine

Question 3

What shape is a Red Blood Cell and why

Answer 3

A red blood cell is a bi-concave to increase surface area for diffusion

Question 4

What is haemoglobin

Answer 4

Haemoglobin is a red pigment

Question 5

Why do RBC’s have no nucleus

Answer 5

RBC’s have no nucleus which allows more space for haemoglobin

Question 6

Are White Blood Cells bigger than RBC’s and explain why or why not

Answer 6

White blood cells are bigger than RBC’s and is part of the immune system that protects the body from harmful microbes and pathogens

Question 7

What to WBC’s produce

Answer 7

They produce antibodies

Question 8

What it the process

Answer 8

They produce antibodies to fight pathogens by coming across an antigen on the surface of a pathogen. It then produces antibodies so the pathogen can be found by other WBCs and be destroyed. Each antigen is specific to an antibody.Also they produce antitoxins to counteract toxins and engulf pathogens (phagocytosis)

Question 9

What are Platelets

Answer 9

Platelets are small fragments of cells that help the blood clot and prevent bleeding

Question 10

What does blood clotting help skin do

Answer 10

Blood clotting helps new skin to grow