Maimting Internal Environemtns Flashcards
What is homeostasis
Regulation of a cell or organism in order to maintain optimum conditions for function in response to internal and external factors
What role does the hypothalamus
The hypothalamus is the main thing that detects and regulates all of the body things that need to be regulated
What does you body do when the core temparature decreases
- vasoconstriction
- hair strands stand up
- shivering
- no sweat
What is vasoconstriction
Vasoconstriction is the narrowing of blood vessels to reduce blood flow, helping to conserve heat.
What does the hair standing up do
Helps trap a layer of air between the stands, acting as an insulating layer.
How does shivering help with warming you up
- Shivering requires energy
- Energy is transferred through respiration
- Respiration is an exothermic reaction meaning it releases energy in the form of heat to its surroundings
What things does your body do to decrease core body temperature
- more sweating
- vasoconstriction
- hair lies flat
What does vasodilation do
Vasodilation is the widening of blood vessels to increase blood flow, helping to release heat
What does sweating do
When sweat is on your skin. And the wind blows the heat is drawn from the sweat cooling you down
What are factors 5hat affect blood sugar levels
- eating
- excersise
- metabolism
Which organ monitors glucose levels
Pancreas
What hapoens when blood glucose levels are too high
The pancreas secretes insulin into the blood stream
What does insulin do
It converts glucose into glycogen, making it easier to store and builds up as fat
What halves when blood sugar levels are low
Glucagon is secreted into the blood stream by the pancreas
What does glucagon do
In the liver, the glucagon converts glycogen back into glucose which increases the blood sugar level
