Which of the following changes will result in decreased blood flow to a tissue?
A. Decreased peripheral resistance
B. Decreased vessel diameter
C. Increased blood pressure
D. Relaxation of precapillary sphincters
E. Increased blood volume
Answer: B. Decreased vessel diameter
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To further reduce the possibility of biological contamination, MOST treatment plants treat the effluent with
A) fluorine. B) chlorine. C) ozone. D) extreme heat.
Which of the following is a nonrenewable resource?
a. copper and gold b. fresh water c. forests d. grasslands e. fish
Which of the following is not one of the groups of streptococci?
A. Pyogenic streptococci B. Dermal streptococci C. Oral streptococci D. None of the choices are correct.
In plants, the vascular tissue made of dead cells that transport water and minerals from the roots is called
A) xylem. B) phloem. C) lignin. D) meristem.