QUESTION A The drug ecstasy makes its users thirsty and also shuts down the urin
ID: 49398 • Letter: Q
Question
QUESTION A
The drug ecstasy makes its users thirsty and also shuts down the urination system so water is returned to the body. In some cases, this is fatal. What is happening to these individuals? Explain
Dehydration of the individual cells
The bladder wall bursts and wastes flow through the body
The cells swell due to increased hydration and can no longer function
Urea becomes concentrated throughout the body, including the brain and leads to brain damage, coma and death
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QUESTION B
Fertilizers are solutions made up of water, potassium, nitrogen and phosphate. What happens to plant cells if you add too much fertilizer? Explain
They swell and burst
The salt level becomes toxic to the mitochondria and ATP synthesis is halted
The salt level becomes toxic to the chlorplasts and photosynthesis is halted
The soil becomes to salty and water leaves the plant via osmosis, causing loss of tonicity, dehydration and eventually death
Dehydration of the individual cells
The bladder wall bursts and wastes flow through the body
The cells swell due to increased hydration and can no longer function
Urea becomes concentrated throughout the body, including the brain and leads to brain damage, coma and death
Explanation / Answer
Answer A: Option A
Drug ecstasy leads to dehydration of cells. This is because there is too much water outside the cells to balance the salth but not inside the cells.
Answer B: Option D
This is a simple process of osmosis. If there is large amount of solute outside the cell, the cell will loose water due to osmosis. This will cause plant to dry out and eventually the plant will die.