Question

question 18 (4 points)
(02.04 mc)
the diagram below shows a cell placed in a solution.
only water is allowed to move in and out of the cell. what will most likely happen to the cell?
a it will expand as water moves out of it.
b it will shrink as water moves out of it.
c it will expand as water moves into it.
d it will shrink as water moves into it.
question 19 (4 points)
(02.05 hc)
runners only have enough stored atp in their muscle cells to run for about five seconds. which answer correctly explains how the runners body adjusts to the longer distance, for example, a marathon (42.1 km)?
a the runners body will convert stored fat molecules into energy.
b the runners body will create the needed energy by breaking down proteins.
c the runners body will supply the needed energy by producing starch.
d the runners body will produce the energy by activating the golgi apparatus.
question 20 (4 points)
(02.05 mc)
jason is trying to explain to his friend how the body stores energy. which analogy would best suit jasons explanation?
a the body storing energy is like a toy needing batteries: when the batteries run out, they are thrown away.
b the body storing energy is like a car holding gas: the cars gas tank keeps the gas until it is needed.
c the body storing energy is like people working to earn money: when they get paid, they spend it all.
d the body storing energy is like a group of shoppers in a store: individuals may come and go, but the numbers stay about the same.

Explanation:

Step1: Analyze Question 18

Osmosis occurs. The cell has a lower salt - concentration (20%) than the surrounding solution (40%). Water moves from an area of lower solute concentration (inside the cell) to an area of higher solute concentration (outside the cell). When water moves out of the cell, the cell will shrink.

Step2: Analyze Question 19

For long - distance running like a marathon, the body needs a large amount of energy. Stored fat molecules are broken down to provide energy. Proteins are not the main source of energy for long - distance running, the body does not produce starch for energy during running, and the Golgi apparatus is not involved in energy production for running.

Step3: Analyze Question 20

The body stores energy in the form of substances like glycogen and fat, similar to how a car's gas tank stores gas until it is needed. The other analogies do not accurately represent energy storage in the body.

Answer:

Question 18: b. It will shrink as water moves out of it.
Question 19: a. The runner's body will convert stored fat molecules into energy.
Question 20: b. The body storing energy is like a car holding gas: the car's gas tank keeps the gas until it is needed.