Which of the following vessels will have the lowest blood pressure?
What will be an ideal response?
vein
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Which of the following is a nucleic acid with a double helix structure?
a. DNA b. RNA c. both A and B above d. neither A nor B above
The organelles that are flattened sacs that chemically process molecules are the:
a. endoplasmic reticulum b. flagella c. Golgi apparatus d. lysosome
Answer the following statement(s) true (T) or false (F)
1. The anterior interventricular sulcus marks the division between the atria and ventricles. 2. In an aging heart, the ventricles tend to enlarge due to increased resistance in the blood vessels. 3. The pulmonary circuit is supplied by both the right and the left sides of the heart. 4. The systemic circuit contains oxygen-rich blood only. 5. Blood in the heart chambers provides most of the myocardium's oxygen and nutrient needs. 6. Papillary muscles prevent the AV valves from prolapsing (bulging) excessively into the atria when the ventricles contract.
Which factor contributes most to the determination of hair color?
A) the structure of the pigments produced by melanocytes at the papilla B) age of the individual C) air bubbles in the medulla of the hair shaft D) All of the answers are correct. E) None of the answers are correct.