Which of the following conditions would have the greatest effect on peripheral resistance?
A) doubling the diameter of a vessel
B) doubling the turbulence of the blood
C) doubling the number of white cells in the blood
D) doubling the length of a vessel
E) doubling the viscosity of the blood
A) doubling the diameter of a vessel
You might also like to view...
Lysosomes contain ____________________ enzymes that are capable of digesting and removing unwanted debris from the cell
Fill in the blank(s) with correct word
Which of the following statements is NOT true?
a. Cnidarians circulate fluid in the coelenteron. b. The differences between an open and a closed circulatory system are clear-cut. c. Many animals have an internal extracellular fluid that is separate from the environment. d. The fluid leaving the capillary bed of closed circulatory systems is similar to the hemolymph of open systems. e. Closed circulatory systems are made necessary by the large size of organisms that have them and the large distances between nutrient sources and cells.
Arrange the events of synaptic transmission in correct sequence
(1) sodium ions diffuse into the cell and cause a local potential (2) neurotransmitter binds with receptor on postsynaptic cell (3) neurotransmitter diffuses across the synaptic cleft (4) membrane permeability to sodium ions on postsynaptic cell increases (5) action potential causes release of neurotransmitter A. 5, 2, 3, 4, 1 B. 5, 2, 3, 1, 4 C. 5, 3, 4, 1, 2 D. 5, 4, 3, 2, 1 E. 5, 3, 2, 4, 1
A mistake during segregation of chromosomes is called
A. deletion. B. duplication. C. nondisjunction. D. point mutation. E. aneuploidy