Homeostasis
The maintenance of a stable internal environment in the body
homeostasis
Detects the stimulus
receptor
Organ that releases hormones to regulate blood glucose levels
pancreas
The two types of feedback in homeostasis are:
negative and positive
Rapid muscle contractions that generate heat are known as:
shivering
This hormone lowers blood glucose levels.
insulin
This organ system uses electrical signals to help maintain internal balance.
nervous system
Compares conditions to the set point and sends signals to the effectors
control centre
Gland in the brain that regulates many body processes including temperature.
hypothalamus
When the body corrects a change by reversing it—such as lowering high temperature—it is using this type of feedback.
negative
When skin blood vessels widen to increase heat loss from the skin.
vasodilation
Name an activity that increases blood glucose levels
Eating carbohydrates
This organ system uses hormones to help maintain internal balance.
endocrine system
A change detected by the body is called a
stimulus
This pair of organs helps regulate the amount of water in the blood
kidneys
When you cut yourself, platelets sticking to the wound trigger chemicals that attract even more platelets to seal the injury. Is this negative or positive feedback?
positive feedback
When skin blood vessels narrow to reduce heat loss from the skin.
vasoconstriction
This hormone raises blood glucose levels when they become too low.
glucagon
The ideal target value for a variable
set point
Muscles or glands that act to correct the change are known as
effectors
This organ stores glucose for use when blood glucose levels are low.
liver
When CO₂ levels in the blood rise, this triggers faster, deeper breathing to remove more CO₂, bringing levels back down. Is this an example of negative or positive feedback?
negative feedback
Control centre in the thermoregulation feedback loop
hypothalamus
Normal variations above or below the set point
set point range (or normal range)
When the condition is brought back within the normal range
response
This part of the brain detects high carbon dioxide (low oxygen) levels in the blood and sends signals to increase breathing and heart rate.
respiratory centre (also accept medulla, pons or brainstem)
Special group of neurons in the hypothalamus that monitor blood temperature directly.
thermoreceptors
The liver stores glucose as a molecule called _____________.
glycogen