Homeostasis Flashcards
Hormonal responses are usually:
- Widespread
- Long-lasting
- Slow
Nervous responses are usually:
- Localised
- Rapid
- Short-lived
What is positive feedback?
When a stimulus causes a factor to deviate more from its original set point
What are behavioural responses of ectotherms to regulate internal body temperature?
- Sun basking
- Exposing selves
- Seeking shade
What is negative feedback?
When a stimulus causes a factor to return to its original set point
What is an endotherm?
An animal that maintains a constant internal body temperature regardless of external environment by generating heat through metabolic processes
What is an ectotherm?
An animal which depends on the environment to regulate its internal body temperature
What do endotherms do in response to high temperatures?
- Vasodilation
- Sweating
- Lowering hair by relaxing hair erector muscles
What do endotherms do in response to low temperatures?
- Vasoconstriction
- Shivering
- Raising hair by contracting hair erector muscles
Where are the temperature sensors in the brain?
- Skin
- Hypothalamus
What is diuresis?
An increase in the production of urine by the kidney resulting in a large volume of dilute urine.
What is gluconeogenesis?
The conversion of non-carbohydrate molecules to glucose
What can type 2 diabetes be caused by?
- Glycoproteins being lost
- Glycoproteins being less responsive
- Faulty insulin production (insufficient amount produced)
What two hormones are produced by the adrenal cortex of the adrenal glands?
- Aldosterone (water regulation)
- Cortisol (hormone)
