Question

1. an overworked medical student is asked to do a red blood cell count on a patient. she takes out some blood and puts a drop on a slide that has distilled (pure) water on it. what do you think she is going to see when she looks under the microscope? 9. suppose a certain molecule needs to be transported into a cell. what factor will determine whether passive transport or active transport will occur? 10. bob eats eggs, bacon and sausage every day for breakfast, while sue eats whole - grain toast and orange juice. knowing that animal protein and fat are sources of cholesterol, how would you explain that sue has higher blood cholesterol levels than bob?

Explanation:

Question 8:

Red blood cells in distilled water will undergo osmosis. Water will move into the cells due to the higher solute - concentration inside the cells compared to the distilled water. This will cause the cells to swell and possibly burst (hemolyze).

Question 9:

The concentration gradient of the molecule across the cell membrane determines whether passive or active transport occurs. Passive transport happens when molecules move down their concentration gradient (from high to low concentration), while active transport occurs when molecules move against their concentration gradient (from low to high concentration) and requires energy.

Question 10:

There could be several reasons. Genetics play a major role in cholesterol production and metabolism. Sue may have a genetic predisposition to produce more cholesterol. Also, other factors in her diet or lifestyle, such as overall diet composition throughout the day, lack of exercise, or stress, could contribute to her higher cholesterol levels despite a seemingly 'healthier' breakfast.

Answer:

1. Swollen or burst red blood cells.
2. The concentration gradient of the molecule across the cell membrane.
3. Genetic predisposition or other diet - lifestyle factors.