Biology Flashcards
Homeostasis Def.
Maintaining A Constant Internal Environment
Control System Pathway
Receptors —> Coordination Centre —> Effectors
Pituitary Gland Def.
Stimulates Production Of Hormones
Thyroid Gland Def.
Produces Hormones, Regulates Metabolic Rate
Adrenal Glands Def.
Produces Hormones To Regulate Metabolism & Blood Pressure, Create “Fight Or Flight” Body Response
Pancreas Def.
Produces Hormones Insulin & Glucagon
Ovaries Def.
Produce Hormone Oestrogen & Regulate Menstrual Cycle
Testes Def.
Produces Hormone Testosterone & Stimulates Sperm Production
Human Nerves System Pathway
Stimulus —> Receptor —> Sensory Neurones —> Coordinator —> Motor Neurones —> Effector —> Response
Examples Of Reflex Actions
Blinking, Breathing, Coughing Sneezing, Etc
Synapse Def.
Junctions Between Neurones
Ruler Drop (Reaction Rate) Practical Steps
- One Person Holds Ruler (From 0cm) Above The Second Persons Hand
- Person Drops Ruler & Starts Timer
- Second Person Detects This From Peripheral Vision
- Second Person Catches Ruler
- Repeat & Calculate Mean Result
Pancreatic Hormones And Use
Insulin (Decreases Blood Glucose Levels Back To Normal), Glucagon (Increases Glucose Levels Back To Normal)
Type 1 Diabetes & Def.
Pancreas Fails To Produce Insulin. Treated With Insulin Injections
Type 2 Diabetes Def. & Treatment
Body Cells No Longer Respond To Insulin, Treated With Healthy Diet & Exercise
FSH Hormone Def.
(Produces In Ovaries) Matures Egg
LH Hormone Def.
(Produced In Ovaries) Stimulates Release Of Egg
Oestrogen & Progesterone Def.
(Produced In Ovaries) Maintains Uterus Lining & Prepares For Pregnancy