True or False: All agents that use a portal of entry to initiate an infection are called exogenous agents.
What will be an ideal response?
False
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Which of the following statements regarding food webs is true?
A) A consumer may eat only one type of producer. B) Detritivores consume dead organic matter from a specific trophic level. C) Several species of primary consumers may feed on the same species of producer. D) Nutrient transfer moves from producer to consumer and back. E) A hawk at the top of the food web is only a quaternary producer.
The lowest concentration of a drug that prevents growth of a microorganism is the
A. infectious dose. B. lethal dose. C. effective dose. D. minimum inhibitory concentration
Which of the following human cells are hosts
to HIV?
a. red blood cells b. nerve cells c. white blood cells d. muscle cells e. more than one of these are host cells to HIV
During orgasm, which of the following
stimulate a feeling of pleasure? a. LH b. endorphins c. testosterone d. oxytocin e. all of these