The typical lesion of secondary syphilis is
A. a painless reddened lesion called a chancre at the site of infection.
B. gummas in bones, in nervous tissues, or on the skin.
C. a generalized rash.
D. purulent sore throat.
E. the development of buboes in the lymph nodes at the site of infection.
Ans: C. a generalized rash.
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The primary role of oxygen in cellular respiration is to _____
A) yield energy in the form of ATP as it is passed down the respiratory chain B) act as an acceptor for electrons and hydrogen, forming water C) combine with carbon, forming CO2 D) combine with lactate, forming pyruvate E) catalyze the reactions of glycolysis
The additive effect of one neuron sending many EPSPs to another neuron over a brief period of time is
called spatial summation.
Indicate whether the statement is true or false.Hypotheses are
a. often in the form of a statement. b. often expressed negatively. c. sometimes crude attempts to offer a possible explanation for observations. d. testable predictions. e. all of these.
The purpose of the pulmonary circuit is to ________ .
a. deliver blood to the hepatic portal system b. send de-oxygenated blood to the heart c. circulate oxygenated blood to the tissues d. oxygenate blood received from the tissues e. receive oxygenated blood from the heart