physiology chapter 12 body defenses

physiology chapter 12 body defenses - Chapter 12 The Body...

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Chapter 12 The Body Defenses (we will not have time to cover immune disorders so remove those questions from the study guide)
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Immunity Body’s ability to resist or eliminate potentially harmful foreign materials or abnormal cells Immune system activities Good Defends against invading pathogens Removes “worn-out” cells and tissue damaged by trauma Identifies and destroys abnormal or mutant cells that have originated in the body Bad Mounts inappropriate immune responses that lead either to allergies or to ___________ diseases Macrophage
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Immunity Major targets of immune system ________ Non-nucleated, single-celled microorganisms Primarily cause tissue damage and cause disease by releasing enzymes or toxins Most bacteria are HARMLESS! ________ Consists of either DNA or RNA enclosed by a protein coat Cannot carry out metabolism or reproduce without invading a host cell Fungi Parasites _________: virulent forms of both bacteria and viruses which can cause disease
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What is a virus? Infectious agents too small to see with a light microscope NOT cells--no nucleus, organelles, or cytoplasm Protein coat (capsid) Genetic material (nucleic acid) Replicate ONLY inside living cells Obligate ___________ parasites!
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Quiz yourself!
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Question 1 The name of the active enzyme which breaks down a blood clot is _________.
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Question 2 To hear Korotkoff sounds in a blood vessel during the taking of a blood pressure requires 2 qualities of blood. What are they?
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Question 3 During inactivity of skeletal muscle, name one local factor (and a modifier, that is increase or decrease) which will promote vasoconstriction and hence will not “waste” blood flow to resting muscle.
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