Homeostasis
What is homeostasis?
The process of keeping the body's internal environment stable despite external changes.
What is negative feedback?
Feedback that reverses/counteracts a change to return the body to normal.
What is osmoregulation?
The process of controlling the body's water balance.
What is thermoregulation?
The process of maintaining a stable body temperature.
How does the endocrine system send messages?
Hormones
Name 3 body systems.
Endocrine, nervous, digestive, circulatory, respiratory, skeletal etc.
What do receptors do in the stimulus response model?
These detect a change in the body.
What type of receptor is involved in osmoregulation?
What type of receptor is involved in thermoregulation.
Thermoreceptors
How does the nervous system send messages?
What does the control centre do?
This processes information and decides what response is needed.
What is the control centre in osmoregulation?
Hypothalamus
What is the control centre in thermoregulation?
Hypothalamus
Which system produces a response that is slower but longer lasting?
The endocrine system
What 2 body systems are most important in maintaining homeostasis?
Nervous and endocrine
What do effectors do in the stimulus response model?
These are muscles or glands that carry out the response.
What are the 2 effectors in osmoregulation? (hint: one is a gland and one is an organ)
Pituitary gland and kidney
What happens when the body gets too hot (state the effector and the response).
Sweat glands produce sweat. Blood vessels dilate.
Which system is responsible for growth, metabolism, and reproduction?
Endocrine system
Why is maintaining homeostasis important?
Homeostasis is important because without it, enzymes and cells cannot work efficiently.
What is positive feedback and provide an example.
Feedback that increases the original change until a goal is reached. Childbirth, exercising
less, less, diluted
What are 2 things that occur when the body gets too cold (list the effectors and the response).
Skeletal muscles shiver. Blood vessels constrict.
Which system would be more useful for quickly pulling your hand away from a hot surface, and why?
The nervous system because electrical impulses travel much faster than hormones