Top 5 - Homeostasis and Response Flashcards
What is Homeostasis?
Give one example as well.
Homeostasis is the term for maintaining a stable internal environment in response to external and internal changes.
Shivering to keep us warm.
Define : Stimulus Receptor Coordination Centre Effector
Change in environment.
Detects a change in environment.
Receive, processes information and coordinates a response.
Muscle or glands that bring about a response.
What factors control internal conditions? And give one practical example.
Water Glucose Temp Oxygen / Carbon Dioxide Wastes E.g Temp to stop enzymes denaturing.
What is a synapse?
A synapse is a gap between two neurones where the chemicals must jump between in order to create a response.
What is a reflex action?
A reflex action is a rapid automated response that don’t involve a conscious part of the brain, which means they are quick to prevent injury.
Give one thing the cerebral cortex is responsible for.
Memories.
Give two differences between nervous and hormonal responses.
Hormonal repossess are usually much slower.
Hormonal responses also last for a very long time when released.
Where is excess glucose stored in the body?
Liver
What effect does the hormone glucagon have on blood glucose level?
Glucagon is formed in the liver and informs the liver there is not enough sugar in the blood.
What is the difference between how type 1 and type 2 diabetes are usually controlled?
Type 1 is a lot more procedural so a lot of hospital work like pancreas transplant or stem cell transplant.
Type 2 is more lifestyle based like balanced diet, stop smoking and or exercise regularly.
Give the four key stages in days of the menstrual cycle.
Day 1 - Braking down lining of uterus
Day 4 -Lining builds up
Day 14 - Egg released
Day 28 - Lining of uterus maintained.
Describe two affects of FSH on the body.
Causes egg to mature
Stimulates ovaries to produce oestrogen
Briefly describe how IVF is carried out.
IVF is collecting eggs from a woman’s ovaries and fertilising them in a lab using the mans sperm.
How does adrenaline prepare the body for fight or flight?
Increases flow of oxygen to brain and muscles and increases heart rate.
