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What is excretion?
The removal of waste products of metabolism (carbon dioxide, urea, excess water and salts)
NAme 2 excretory products of animals.
Urea, carbon dioxide, excess water and salts
What is deamination?
The removal of the nitrogen-containing part of amino acids to form urea.
What happens to excess protein you eat?
They are deaminated, into carbohydrates and ammonia. Ammonia is converted into urea.
Humans cannot digest cellulose in our food - Getting rid of undigested cellulose in faeces is not excretion. It is called _____.
Egestion
How many kidneys does a healthy person have?
2
3 main parts of a kidney. Start from the outer to the inner part.
cortex, medulla,pelvis
Kidneys are made up of thousands of tiny tubules called
nephrons
The ________ carries urine that the kidney has made to the bladder.
ureter
Which part of kidney does filtration or ultrafiltration happen. Clue: It is shaped like a cup with a tangle of blood capillaries.
between your renal capsule and glomerulus
Name two substances found in the blood which you would not find in the fluid inside a renal capsule.
Proteins, red blood cells
stimulus
A change in an organisms surroundings that can be detected by its sense organs
receptors
A cell that is able to detect changes in the environment; often part of a sense organ
effectors
A part of the body that responds to a stimulus, e.g a muscle or a gland
3 types of neurones
sensory, relay, motor
neurotransmitters
chemical substance/messenger
