Body Balance Flashcards
(21 cards)
What are three examples of homeostasis?
- glucose balance
- heat balance
- water balance
Insulin cycle
After a meal, the blood glucose levels rise and insulin is released. The glucose level returns back to normal.
- negative feedback loop
Glucagon cycle
When glucose levels drop too low, glucose is released from the liver. The glucose level returns back to normal.
Positive feedback examples
- childbirth
- fever
- blood clotting
What organ plays a vital role in water balance/ osmoregulation?
The kidneys
What is the role of the kidneys?
The kidneys filter blood, removing waste products and excess water
Where does unfiltered blood enter through the kidney?
The renal artery
Where does filtered blood exit through the kidney?
The renal vein
The uterus is where…
concentrated urine solution exits the kidneys to be stored in the bladder
Heat balance:
How does the body react when body temperature rises?
- response : skin and sweat glands are activated to reduce body temperature
Heat balance:
How does the body react when the body temperature drops?
- response: veins are constricted, body begins to shiver/shake
What are the parts of the kidneys?
- Ureter
- Renal vein
- Renal artery
- Renal Cortex
- Renal Medulla
- Minor Calyx
- Major Calyx
What is the significance of enzymes in thermoregulation?
Enzymes are the proteins that speed up metabolism in the body. Internal body heat is generated by metabolism.
What is ADH?
a urine-reducing hormone.
When the Hypothalamus senses the low levels of water in the blood, it sends which hormone from the pituitary gland?
ADH - to remove less water from the blood so that less water is lost through urine.
When the Hypothalamus senses too much water in the bloodstream, it releases LESS of which hormone from the pituitary gland?
ADH - As ADH is a urine-reducing hormone, if less ADH is released, more water from the bloodstream is able to be removed and loss through urine.
Draw a negative feedback loop for glucose or insulin
Draw a positive feedback loop
Does positive feedback intensify or reduce the stimulus?
intensify
Does negative feedback intensify or reduce the stimulus?
reduce
Four parts of feedback loop
- stimulus
- sensor
- control
- effector
