Trying to Get in

Circadian rhythms
Biological pattern that happensover a day e.g feeling sleepy at the same time every day
Hormone
Chemical messenger
Photoperiodism
Responses to changing day length e.g. flowering when days get longer.
Germinate
When a seed sends out a shoot
Pathogen
Organisms that cause disease
Pasteurisation
Quicly heating and then cooling a substance to kill bacteria
Aseptic
Methods used to keep things free from microorganisms
Exponential
When a value keeps doubling e.g. division in bacteria
Antigen
A marker on the surface of a cell, that can be recognised by the immune system
Antibodies
Protein produced by lymphocytes which attach to antigens on foreign cells causing them to clump together
Lymphocyte
White blood cell that produces antibodies
Memory lymphocyte
White blood cell which remains in blood readyto respond if the same antigen comes along again.
Vaccine
A dead or weakened pathogen injected togive someone immunity
Primary response
The first time your body responds to an infection
Secondary response
The second time your body responds to an infection
Monoclonal antibody
Identical antibodies which can be used to identify a particular substance
Hybridoma
B lymphocyte fused with a cancer cell
B lymphocyte
A lymphocyte thatisproducing antibodies and cant divide anymore.
Radiotherapy
Ionising radiation used to kill cancer cells
Dialysis machine
Machine that removes waste from the blood.
Kidney
Organ responsible for cleaning the blood
Glomerulus
Network of capillaries in the kidney
Ultrafiltration
Small molecules are filtered out of blood into bowmans capsule
Selective reabsorption
Reabsorbing useful substances back into the blood.
ADH
Hormone that makes kidney reabsorbe more water so you make less urine.
Ovulation
When an egg is released from the ovary.
Oestrogen
Hormone that causes thickening of uterus wall
FSH
Hormone that causes development ofegg and release of oestrogen
LH
Hormone that causes ovulation...