A change in the amino acid sequence of DNA coding for one of the globin chains of the hemoglobin molecule results in a condition known as __________.
a. sickle cell anemia
b. leukemia
c. leukopenia
d. thalassemia
Answer: a. sickle cell anemia
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Carla was startled by an extremely loud bang that sounded like a gunshot. Her heartbeat accelerated rapidly. When she found that the noise was only a car backfiring, she felt greatly relieved but her heart kept beating heavily for over half an hour. Why did this happen?
What will be an ideal response?
Which of the following is located in the cytoplasm?
A) DNA B) centriole C) chromatin D) envelope E) nucleolus
What are the two types of diuresis?
a. insulin diuresis and insulin diuresis b. sodium diuresis and potassium diuresis c. water diuresis and hydrostatic diuresis d. osmotic diuresis and hydrostatic diuresis e. osmotic diuresis and water diuresis
Which of the following activities is not regulated by the kidneys?
A) regulating the volume of blood plasma and thus blood pressure in the body B) regulating the concentrations of certain electrolytes and waste products in the blood This is the correct answer. C) regulating the absorption of substances from the gastrointestinal tract D) regulating the acid-base balance (pH) of the blood plasma