If osteoclasts are more active than osteoblasts, bones will become
A) denser.
B) thicker.
C) osteopenic.
D) stronger.
E) calcified.
C
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Answer the following statements true (T) or false (F)
1. Every minute, about 1.5 ml of fluid leaks out of the capillaries. 2. The pancreas is an example of an organ with arteries that do not anastomose. 3. An obstruction in the superior vena cava would decrease the flow of blood from the head and neck to the heart. 4. Arteries supplying the same territory are often merged with one another, forming arterial anastomoses. 5. An increase in blood viscosity will cause an increase in peripheral resistance.
An inflammation of the meninges called meningitis usually affects the
A) dura mater and arachnoid mater. B) arachnoid mater and pia mater. C) dura mater only. D) pia mater only.
The aortic valve opens
a. when ventricular pressure exceeds aortic pressure b. just before ventricular systole begins c. just after the isovolumetric relaxation phase d. in response to the repolarization of contractile cells in the left ventricle e. just before atrial diastole begins
Blood flow is affected by
a. pressure differences b. the viscosity of the blood c. the amount of friction in the blood vessels d. the length and diameter of the blood vessels e. all of the above