why?
water accounts for over 70% of the human body. if water levels are not regulated and maintained in an organism the consequences can be disastrous. cells and tissues may swell, blood cells burst, or the brain may expand so much it pushes on the skull, leading to brain damage and death. so what exactly is the process that allows organisms to regulate and maintain their water content?
model 1 – movement of water in and out of cells
(image of model 1 – movement of water in and out of cells with legend: o - sugar molecules (solute); + - water molecules (solvent); === - selectively permeable membrane)
1. a solution consists of a solute and a solvent mixed together. for the solution in model 1 identify and provide the symbol for the
a. solute.
b. solvent.
2. consider the size of the sugar and water molecules in model 1. which molecules in the diagram in model 1 are able to move through the selectively permeable membrane?
3. complete the table below by counting the molecules in model 1.
| | inside the cell | outside the cell |
|----------------|-----------------|------------------|
| number of sugar molecules | | |
| number of water molecules | | |
| ratio of water to sugar | | |

Question

why?
water accounts for over 70% of the human body. if water levels are not regulated and maintained in an organism the consequences can be disastrous. cells and tissues may swell, blood cells burst, or the brain may expand so much it pushes on the skull, leading to brain damage and death. so what exactly is the process that allows organisms to regulate and maintain their water content?
model 1 – movement of water in and out of cells
(image of model 1 – movement of water in and out of cells with legend: o - sugar molecules (solute); + - water molecules (solvent); === - selectively permeable membrane)
1. a solution consists of a solute and a solvent mixed together. for the solution in model 1 identify and provide the symbol for the
   a. solute.
   b. solvent.
2. consider the size of the sugar and water molecules in model 1. which molecules in the diagram in model 1 are able to move through the selectively permeable membrane?
3. complete the table below by counting the molecules in model 1.
|                | inside the cell | outside the cell |
|----------------|-----------------|------------------|
| number of sugar molecules |                 |                  |
| number of water molecules |                 |                  |
| ratio of water to sugar   |                 |                  |

Accepted Answer

### 1a.
# Explanation:
## Step1: Recall solution components
A solution has solute (dissolved) and solvent (dissolver). In Model 1, sugar is solute, water is solvent.
## Step2: Identify solute symbol
The diagram labels sugar molecules as $ \bigcirc $. So solute (sugar) uses $ \bigcirc $.
# Answer:
Solute is sugar molecules, symbol $ \bigcirc $ (circles representing sugar molecules).

### 1b.
# Explanation:
## Step1: Recall solvent definition
Solvent is the substance doing the dissolving (water here).
## Step2: Identify solvent symbol
Diagram labels water molecules as $ + $. So solvent (water) uses $ + $.
# Answer:
Solvent is water molecules, symbol $ + $ (plus signs representing water molecules).

### 2.
# Explanation:
## Step1: Analyze molecule size
Sugar molecules ($ \bigcirc $) are larger; water molecules ($ + $) are smaller.
## Step2: Check membrane permeability
Selectively permeable membranes allow smaller molecules through. So water molecules ($ + $) can move through.
# Answer:
Water molecules (represented by $ + $) are able to move through the selectively permeable membrane.

### 3.
# Explanation:
## Step1: Count sugar inside
Count $ \bigcirc $ inside the cell (area with dashed membrane). Let's assume (from typical diagrams) inside sugar: 12, outside: 8.
## Step2: Count water inside
Count $ + $ inside. Assume inside water: 16, outside: 24.
## Step3: Calculate ratios
Inside ratio: $ \frac{16}{12} = \frac{4}{3} $, outside: $ \frac{24}{8} = 3 $. (Note: Actual counts depend on diagram, but process is counting $ \bigcirc $ and $ + $ in each region.)
# Answer:
|  | Inside the Cell | Outside the Cell |
| --- | --- | --- |
| Number of sugar molecules | 12 (example, count $ \bigcirc $) | 8 (example, count $ \bigcirc $) |
| Number of water molecules | 16 (example, count $ + $) | 24 (example, count $ + $) |
| Ratio of water to sugar | $ \frac{4}{3} $ | $ 3 $ |

(Note: For precise counts, manually count $ \bigcirc $ (sugar) and $ + $ (water) inside/outside the dashed membrane area in the diagram.)

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QUESTION IMAGE

Question

Explanation:

1a.

Step1: Recall solution components

Step2: Identify solute symbol

Step1: Recall solvent definition

Step2: Identify solvent symbol

Step1: Analyze molecule size

Step2: Check membrane permeability

Answer:

1b.