Which cell structure functions as the "control center" of the cell?
A)Mitochondrion
B)Nucleus
C)Centrosome
D)Nucleolus
E)Lysosome
B)Nucleus
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Which type of blood vessels contain valves and what is their function?
What will be an ideal response
If a bone is immersed in a weak acid such as vinegar for several days, its inorganic components will dissolve. What will be the result of such an experiment?
A. The spongy bone will dissolve, leaving only the outer compact bone. B. The compact bone will dissolve, leaving only the inner spongy bone. C. The bone will dissolve completely. D. The bone will become extremely brittle. E. The bone will become soft and bendable.
The most superior segment of the upper limb is called the ________
A) antebrachial region B) brachial region C) digits D) carpal region E) manual region
Which of the following is made possible by the expansion of the thoracic cage during pregnancy?
A. Kidneys produce more urine because her blood volume is increased B. Cardiac output increases 30% due to her increased blood volume C. Respiratory ventilation increases 50% D. Decreased motility in the digestive system