B12 Homeostasis In Action Flashcards
Where is the bodies thermo regulatory centre
In the hypothalamus
How does the hypothalamus regulate temperature
Recieves infomation via heat receptor nuerones. If the core body termperature begins to rise, the hypothalamus triggers responses which triggers heat loss or heat gain
Give two examples of ways the body gains and looses heat on purpose
Sweating, breathing
Shivering, goosebumps
What is the process that happens when temperature rises and how does it happen.
Triggers vasodilation which causes smooth muscles in the wall of the arteriole to relax and the arteriole to dilate allowing more blood to reach the surface of the skin and cool down
Why does urea have to be removed from the body
Because it is poisonous and can cause extensive damage to your cells
Why does co2 have to be removed from the body?
Because dissolved co2 produces an acidic solution which would affect the ways all of your cells work
What is the main function of the kidney
The Kidneys clean blood and produce urine which is excreted out of the bladder
Explain the process of howbthe kidneys produce urea
Glucose, salts, mineral ions, urea and water all move out of your blood amd into the kidney
Any useful substances like glucose, some ions and the right amount of water will be reabsorbed back into the blood through selective reabsorbtion
Anything not needed is passed through the urine
What hormone controls the concentration of urine?
ADH (anti-dicretic horrmone)
How is concentration of urine controlled (explain the process)
The brain monitors the water content of the blood and tells the pituatary gland to release ADH into the blood depending on how much is needed through a negative feedback loop
Name two advantage and two dissadvantages of kidney transplant
Allows patient to live a normal life
Doesnt require lots of maintenance after transplant
Chance of infection
Kidney could get rejected
Explain the process of dialysis
- blood is pumped out of the arteries
- blood thinners are added
- salt and urea are removed by diffusion
- clean blood flows through a bubble trap to get rid of the bubbles
