These vessels allow blood to bypass capillary beds:
a. arterioles.
b. capillaries.
c. metarterioles.
d. arteries.
e. none of these answers.
C
You might also like to view...
What contains a spider web-like network of cells and fibers through which cerebrospinal fluid flows?
A) subdural space B) dural sinus C) falx cerebri D) subarachnoid space E) pia mater
A semipermeable membrane encloses a solution of 10 mM NaCl and 5 mM KCl. This "cell" is placed into a solution of 6 mM CaCl2 and 6 mM NaCl
a. The "cell" will be hypertonic to the surrounding solution. b. The "cell" will be isotonic to the surrounding solution. c. The "cell will be hypotonic to the surrounding solution. d. The "cell" has a lower hydrostatic pressure than the surrounding solution. e. Not enough information is provided to answer the question.
In a lab experiment with isolated lung cells you observe a linear uptake in choline from the extracellular medium by the cells until the extracellular concentration of choline reaches 200 nM. At this concentration the curve levels off and the same rate of uptake is seen at 200 and 225 nM extracellular choline. What has happened that can explain this observation?
a. Cellular and extracellular choline concentrations are at equilibrium. b. The transporters for choline saturate at 200 nM. c. At choline concentrations of 200 nM and above, the osmotic pressure of the cytoplasm prevents additional choline from entering the cell. d. The cell cannot synthesis enough ATP to keep up with the energy demand of the carrier. e. None of these.
The scalenes have their origin on the
A) transverse and costal processes of cervical vertebrae. B) inferior border of the previous rib. C) superior border of the next rib. D) cartilages of the ribs. E) thoracodorsal fascia and iliac crest.