Which of the following has no nucleus?
a. White blood cells.
b. Sperm cells.
c. Red blood cells.
d. Liver cells.
Answer: c. Red blood cells.
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An elderly woman with pronounced kyphosis suffers a hip fracture. What type of fracture is most likely?
A. Stress fracture B. Pathologic fracture C. Closed reduction fracture D. Fragmentary fracture E. Uncomplicated fracture
Answer the following statements true (T) or false (F)
1. A buffer is a chemical that helps prevent a sudden change in pH. 2. The word “carbohydrate” literally means “sugar.” 3. Both sucrose and lactose are monosaccharides. 4. Glucose is used by the body as a source of energy. 5. Both sucrose and lactose are disaccharides.
Which of the following factors stimulates a newborn's first breath?
A) All of the above B) Increasing concentration of carbon dioxide C) Decreasing pH D) Low oxygen concentration
Secretion of organic ions takes place in the:
a. Bowman's capsule. b. loop of Henle. c. proximal tubule. d. collecting duct. e. glomerulus.