Formed primarily of tunica intima and strengthened by elastic and collagen fibers, the ________ in veins prevent blood from pooling.
Fill in the blank(s) with the appropriate word(s).
valves
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Which of the following statements represents the force-velocity relationship for muscle tissue?
A. contraction is faster when the load is heavier B. contraction is slower when the load is heavier C. contraction is slower when the load is lighter D. the speed of contraction is not affected by the nature of the load
The thin fibrous membrane that lines the medullary cavity is called the:
a. diaphysis b. epiphysis c. periosteum d. endosteum
Answer the following statements true (T) or false (F)
1. The liver carries out the first steps in both protein and carbohydrate metabolism. 2. The liver produces plasma proteins such as prothrombin and fibrinogen. 3. Glucose is the preferred energy food for the cells. 4. The first step in carbohydrate catabolism is glycolysis. 5. Glycolysis occurs in the mitochondria.
Sympathetic stimulation is responsible for pupil ________ in ________ light.
A. constriction; dim B. constriction; bright C. dilation; dim D. dilation; bright