People with Sickle-Cell Anemia Have Deformed Hemoglobin Molecules and Often

question 67

Multiple Choice

People with sickle-cell anemia have deformed hemoglobin molecules and often suffer muscle pains, even at low levels of exertion. These symptoms might come about because the deformed hemoglobin

• A)is unable to carry the amount of oxygen required for normal activities of muscles.
• B)cannot diffuse across the cells' membranes from the blood plasma.
• C)causes damage to the muscle cells as it enters the muscle.
• D)decreases the person's ratio of surface area to volume.

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Average Tax Rate

The proportion of the total tax paid to the total taxable income, calculated by dividing the total tax amount by the taxable income.

Marginal Tax Rate

The percentage of tax applied to your income for each tax bracket in which you qualify, essentially the rate at which your last dollar of income is taxed.

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