Adherence factors include ALL of the following EXCEPT
a. capsules.
b. fimbriae.
c. flagella.
d. lipopolysaccharide layers.
Answer: D
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A scientist performs an experiment in which they create an artificial cell with a selectively permeable membrane through which only water can pass. They inject a 5M solution of glucose into the cell and then place the cell into a beaker of water. After an hour, what effect do you expect to observe?
A. Water moves out of the cell B. Glucose moves out of the cell C. No net change in cell weight D. Water moves into the cell E. Glucose moves into the cell
Which of the following structures are NOT used by chemical synapses during signal transmission?
a. gap junctions b. ligand-gated receptors c. Ca2+ d. vesicles e. neurotransmitters
Resource partitioning is the result of ____
a. parasitism b. mutualism c. competition d. predation e. commensalism
Which statement about the structure of neurons is true?
a. Dendrites carry impulses away from the cell body. b. Axons may form branches known as collaterals. c. Nerve impulses travel down the axon toward the cell body. d. Dendrites are often myelinated for faster conduction. e. Synapses occur between the cell body and its axon.