Question

1-San Diego is a city that is at sea level. Denver is 5280 ft above see level.

The atmospheric pressure is higher at San Diego / Denver / Neither.

% of O₂ in the air is higher at San Diego / Denver / Neither.

The Partial Pressure of O₂ is lower at San Diego / Denver / Neither.

In a closed vessel (like the water bottle), air will take up more volume at San Diego / Denver / Neither.

2-

Which of the following statements is true?

Cold water contains more dissolved oxygen than hot water

Salt water contains more dissolved oxygen than freshwater

Pressure has no effect on solubility of gasses in water

The % of oxygen in air is less than the % of oxygen in water

Both A and B

3-

Which of the following statements about blood pressure is false?

Blood flow is proportional to pressure an inversely proportional to resistance

Blood pressure is not the same in all areas of an animal’s body

The primary contributor to overall resistance to blood flow is arteriole radius

A high hematocrit reduces overall blood pressure

All of the above statements about blood pressure are correct

Answer 1

Solution:

1.As altitude increases, the air pressure decreases. So volume of air present decreases and hence there will be lesser air molecules (Oxygen molecules are lesser). The partial pressure of Oxygen will also decrease with altitude.

Air expands and occupies more volume as the altitude increases .

The atmospheric pressure is higher at San Diego .

% of O2 in the air is higher at San Diego .

The Partial Pressure of O2 is lower at  Denver.

In a closed vessel (like the water bottle), air will take up more volume at Denver.

2.Cold water contains more dissolved oxygen than hot water is TRUE.

Hot water has Less dissolved Oxygen than cold water.. In Cold water solubility of Oxygen is more because of the intermolecular forces between the molecules.

Fresh water has more Oxygen than Salt water.

Salt water contains more dissolved oxygen than freshwater . FALSE.

Henry's law states that the solubility of a gas in a liquid is directly proportional to the pressure of that gas..

Pressure has no effect on solubility of gasses in water FALSE.

The % of oxygen in air is less than the % of oxygen in water TRUE .

3. All of the above statements about blood pressure are correct.