When the body needs to conserve water the What do the terms

When the body needs to conserve water, the What do the terms isotonic and hypertonic meant since the fluid the that is to become begins as (an isotonic solution is solution) What must happen to change it to a hypertonic ? Explain. What component of the morals solutions was active? Explain why this is true. These receptors called osmoreceptors are stimulated by an increase in blood osmolality. Imagine a man who has just landed on Trace the course of events leading to his sensation of thirst. Can he satisfy his thirst by drinking seawater? Explain. Before the invention of pioneers preserved meat by salting it. Explain how meat can be preserved by this Procedure

Solution

6.Isotonic means the concentration of water both inside and outside of the cell is the same.So, there is no net movement of water on both sides of the cell.Hypertonic means the concentration of water inside the cell is more than inside as a result of which water moves out of the cell.In order for the urine to become hypertonic,urine is first concentrated in the loop of henle by reabsorption of urea.This allows more water to flow out of collecting tubules and outside the body as urine.

7.The sugar content present in the molasses was osmotically active.This is because the dialysis membrane is permeable to water but not to sugar.Therefore there was a movement of water from beaker to the beaker containing sugar solution i.e the molasses.

8.Thirst is initiated by cerebral osmoregulators that can detect changes in the osmolarity of plasma.While on a desert land, the man will undergo sweating and there will be loss of water from his body through sweating.This will increase the concentration of solutes in the blood and osmolarity of plasma will increase.This change in plasma osmolarity is sensed by osmoregulators that get stretched and the send neural signals to hypothalamus that in turn initiates the secretion of ADH hormone.ADH hormone reabsorbs the water from the kidneys and urine.ADH hormone sends impulses to the cerebral cortex and sensation of thirst arises.No, sea water cannot satify his thirst because the salts present in sea water will increase the plasma osmolarity further and he will feel more thirsty.

9.Salting helps to preserve food in the following ways: