Excretion

Question 1

What is excretion

Answer 1

Getting rid of waste, from chemical reactions

Question 2

What needs to be excreted

Answer 2

Carbon dioxide, respiration, waste product eg: urea, water and slats foods and drinks

Question 3

What is urea

Answer 3

Urea is made from break down of excess animo acids in high concentrations is toxic

Question 4

What is homeostasis

Answer 4

The maintenance of constant internal environment

Question 5

Examples of homeostasis

Answer 5

Water levels (osmoregulation)
Temperature, maintain body temp 
PH of blood

Question 6

What is a kidney

Answer 6

An organ that excretes and osmoregulates

Question 7

The process of urine

Answer 7

1. The liver breaks down animo acids
2. Urea is transported from the liver to the kidneys
3. The kidney excretes the urine

Question 8

What is ADH

Answer 8

ADH is a hormone, the brain detects that you dont have enough water and releases ADH

Question 9

What is a kidney stone

Answer 9

A stone made of minerals that collect if you have a high salt diet, very painful and has to be excreted

Question 10

Parts of a kidney

Answer 10

Cortex
Pelvis
Medulla
Ureter

Question 11

What is a nephron

Answer 11

A fictional unit of the kidney that’s produces the urine

Question 12

The process of producing urea

Answer 12

1. Ultrafiltration in the glomorous bowman’ s capsule, this filters the blood and removes water salts, ion urea, glucose
2. selective reabsorption, this puts some of the useful molecules back in the blood ( salts, ion urea, glucose etc) this happens in the proximal tubule
3. Reabsorption of water, water is reabsorbed into the blood in the loop of henle