Which of the following is not true regarding sickle-cell disease?
A. It is caused by a recessive allele that modifies the structure of hemoglobin.
B. It is a cause of malaria.
C. It is advantageous in that it can protect carriers against malaria.
D. It is due to a hereditary hemoglobin defect.
E. It is a cause of anemia.
Answer: B
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The fluid that lubricates movable joints is produced by
A) mucous membrane. B) cutaneous membrane. C) synovial membrane. D) serous membrane. E) plasma membrane.
The heart is called a "double pump" because there are two functionally separate circulations. Trace the pathway of each of these circulations and include the following information: heart chambers involved, major blood vessels involved, and general areas through which the blood flows. Begin with the right atrium.
What will be an ideal response?
Depolarization of the motor end plate results from more ____________________ ions entering the cell than ____________________ ions leaving the cell
Fill in the blank(s) with correct word