The second heart sound is heard when
A) the AV valves open.
B) the AV valves close.
C) the semilunar valves close.
D) the atria contract.
E) blood enters the aorta.
C) the semilunar valves close.
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You find a bone that has a round head at one end, two large, smooth condyles at the other end, and a long ridge for muscle attachment on one side of the shaft. Based on your knowledge of bone markings, you identify it as which bone?
A. Ulna B. Tibia C. Femur D. Radius E. Fibula
The cell membrane
A) has all of the above characteristics. B) provides a barrier to water-soluble substances. C) maintains the integrity of the cell. D) controls the entry and exit of various substances.
List 5 points to consider when selecting a disinfectant
What will be an ideal response?
Blood is classified as connective tissue
a. True b. False Indicate whether the statement is true or false