What force continues to drive blood through the vasculature during ventricular diastole?
a. ventricular contraction forces blood into the vasculature during ventricular diastole.
b. the elastic recoil of the stretched arterial walls provides the force to continue blood flow in the remaining vascular system during ventricular diastole.
c. sympathetic stimulation produces arterial vasoconstriction, which drives the blood forward into the arterioles during ventricular diastole.
d. skeletal muscle contraction squeezes the blood forward from the arteries during ventricular diastole.
e. respiratory movements produce pressure changes in the chest, which establishes a pressure gradient that drives blood forward from the arteries into the microcirculation.
B
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How much kidney filtrate is reabsorbed back into the vascular system?
A. 50-60% B. 100% C. 98-99% D. 75-80%
Label R represents which of the following structures?
A) hilum
B) renal pelvis
C) renal cortex
D) renal medulla
E) renal sinus
Improving the resolving power of the compound eye would require
A) Increasing the number of ommatidia. B) Increasing the size of each ommatidium. C) Decreasing the size of the pinhole opening on each ommatidium. D) Decreasing the thickness of the cornea.
Answer the following statements true (T) or false (F)
1. A molecule of glycogen contains more saccharide units than a molecule of sucrose. 2. A molecule of glucose has more saccharide units than a molecule of lactose. 3. Muscles store chains of glucose in a molecule called dextrose. 4. Glycogen and starch are both polysaccharides. 5. Cholesterol is an important source of energy for the body.