Which of the following statements concerning neutrophils and macrophages is false?
A. They both exhibit chemotaxis.
B. They both move by amoeboid motion.
C. Both are capable of phagocytosis.
D. Both release histamine when activated.
E. Both can squeeze between cells.
D
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A male inherits X-linked traits from ________.
A. one or the other of his parents B. only his father C. both his father and mother D. only his mother
Only 10% of the population is
A. asthenic. B. hypersthenic. C. hyposthenic. D. sthenic.
The mechanism of acid secretion by the parietal cells of the stomach involves the actions of the
A) Enzyme pepsid anhydrase. B) K+/H+ ATPase proton pump. C) Cl-/H+ exchanger. D) All of the above
Temporal summation ________.
A. only involves excitatory postsynaptic potentials B. occurs because of the convergence of many neurons on a single postsynaptic cell C. only involves inhibitory postsynaptic potentials D. occurs when a single neuron releases neurotransmitter rapidly