____________________ T cells secrete interleukins that activate other cells in both the cell-mediated
and antibody-mediated immune responses. Fill in the blank(s) with the appropriate word(s).
ANS: Helper
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Natural killer cells destroy target cells by releasing ____
a. antibiotics, which breakdown the target cell’s membrane b. perforin, which creates holes in the target cell’s membrane c. histamine, which signals other blood cells to aggregate d. lysozyme, which breaks down the bacterium’s cell wall e. antibodies, which break down the bacterium’s cell wall
Inhaling or "huffing" is a way to achieve a high, usually by breathing in a fat-soluble substance. Which of the following structures would be most likely attacked first?
A) myelin sheath B) axon C) neuron D) dendrite
What is a challenge that organisms living in an estuary face that other aquatic organism normally do not face?
A. changes in temperature at different depths B. daily changes in salinity C. movement of water D. light penetrating only through the photic zone E. damage from pollution
The syndrome known as cat scratch disease results when (Bartonella/Pseudomonas/Rickettsia) is introduced into a wound
What will be an ideal response?