B3.3.5 Osmotic Challenges Flashcards
1
Q
Symptoms of dehydration
A
- dark, concentrated urine
- headaches and dizziness
- lack of energy
2
Q
What triggers thirst response?
A
Reduction in water potential of blood plasma
Increase in salt concentration
3
Q
What is the thirst response?
A
Impulse sent to brain informing you to take more fluids
Kidney produces less urine
If more fluids not taken = dehydrated
4
Q
What happens when you take in too much water/not enough salt?
A
Water potential of blood plasma rises above water potential of cells
Kidneys increase volume of urine produced
If rapid consumption: water moves to cells by osmosis, cells burst, also sodium in blood plasma drops=muscle cramping, confusion, seizures
5
Q
Hypertonic
A
High levels of glucose and salt
6
Q
Hypotonic
A
Low levels of glucose and salts
7
Q
Isotonic
A
Ion concentrations = that in blood plasma
