Why do diseases involving widespread infection often result in a fever?
The inflammatory and immune responses result in extra heat production.
The brain’s temperature control center responds to inflammation by creating a hot environment unfavorable to the growth of microorganisms.
Which cells would be active during an immune response to a viral infection?
Cell-mediated immune responses to viral infections involve T lymphocytes, ADCC, macrophages, natural killer (NK) cells, lymphokines, and monokines (Figs. 50-5 and 50-6).
Which of the following is a chemical molecule that causes blood vessels to dilate and leak fluid into a wound causing it to swell?
Tissues release 2 chemicals- histamine and kinins that: cause blood vessels to dilate and capillaries to become leaky, which allows fluid into the injured area and neutrophils to enter the area (diapedesis), macrophages soon follow.
Which of the following is one of the body’s first line of defense against infection?
The first line of defence (or outside defence system) includes physical and chemical barriers that are always ready and prepared to defend the body from infection. These include your skin, tears, mucus, cilia, stomach acid, urine flow, ‘friendly’ bacteria and white blood cells called neutrophils.
When you cut yourself the damaged cells immediately release histamine?
|Term The body’s innate defenses against infection include||Definition barriers such as dead skin cells and mucus.|
|Term When you cut yourself, the damaged cells immediately release chemical alarm signals, such as||Definition histamine|
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