Give an overview of immune system function
What will be an ideal response?
The immune system is an internal defense system that plays a key role in recognizing and either destroying or neutralizing things that are not "self," specifically: (1) defending against invading pathogens (disease-producing microorganisms); (2) removing worn-out cells and tissue damaged by trauma or disease, paving the way for wound healing and tissue repair; and (3) identifying and destroying abnormal cancer cells that have originated in the body, a function termed immune surveillance.
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The August Krogh Principle states that
a. understanding physiology can only be accomplished through the study of evolution by natural selection. b. the shortest distance between two points is a straight line. c. understanding physiological phenomena is enhanced by studying model organisms that have adapted to deal with particular physiological challenges. d. salamanders are good for studying regeneration of limbs since what will be learned can be applied to human medicine.
Which of the following does not represent active range of motion at the knee joint?
A. Jace extended his knee to kick a ball across a field. B. Brandon extended Sally's knee during their ice skating performance. C. Kathy flexed her knees to squat down during exercise. D. Tanner flexed his knee to push his books under the chair.
The plasma membrane of cells lining the small intestine has ________, which are specialized for absorption of nutrients
A) cilia B) microvilli C) dynein arms D) flagella E) a glycocalyx
Which of the following is NOT a method used by the respiratory system to help the immune system fight against pathogens?
A. Mucus helps trap pathogens. B. Tonsils help activate T cells. C. Cilia sweep impurities out of the lungs. D. Dust cell macrophages remove pathogens from the nasal cavity.