EMBRYOLOGY
RESPIRATORY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The egg will gain water and swell.
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Water will move in and out of the cell equally, and the cell with neither shrink nor swell.
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The egg will lose water and shrink.
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None of the above
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Detailed explanation-1: -Answer. Answer: An egg with a dissolved shell is placed in pure water for 48 hours. Water will move in and out of the cell equally, and the cell with neither shrink nor swell.
Detailed explanation-2: -This process of water moving through a membrane is called osmosis. Osmosis equalizes – or makes the concentration of water on both sides of the egg membrane the same. This means the egg will swell as the water moves inside and get larger.
Detailed explanation-3: -If the membrane were completely permeable, water molecules would move in and protein would move out until both solutions were the same concentration. Since the egg membrane is semi-permeable, water can move in but proteins cannot move out.
Detailed explanation-4: -Adding salt to the water increases the density of the solution because the salt increases the mass without changing the volume very much. When enough salt is added to the water, the saltwater solution’s density becomes higher than the egg’s, so the egg will then float!