Positive-feedback control systems:
have no effect on the deviation from set point.
accelerate a change.
ignore a change.
do not exist in human systems.
The Correct Answer is B
A. have no effect on the deviation from set point: They have a major effect by pushing the body further away from the set point temporarily.
B. accelerate a change: Unlike negative feedback (which reverses change), positive feedback reinforces or amplifies the stimulus (e.g., labor contractions or blood clotting).
C. ignore a change: Biological control systems are designed specifically to respond to change, not ignore it.
D. do not exist in human systems: They do exist, though they are much less common than negative-feedback loops.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. touch: Touch is a primary somatic sense mediated by mechanoreceptors in the skin.
B. temperature: Thermoreceptors throughout the body allow us to detect heat and cold as part of the somatic sensory system.
C. pain: Nociceptors detect tissue damage or potential injury, which is a vital somatic sensation.
D. all of the above: Since touch, temperature, and pain are all categorized as general body (somatic) senses rather than special senses (like vision), this is the correct choice.
Correct Answer is {"dropdown-group-1":"D"}
Explanation
A. Spectrin: This is a cytoskeletal protein that gives red blood cells their flexibility.
B. Erythropoietin: This is a hormone produced by the kidneys that stimulates the production of red blood cells.
C. Serum: Serum is the liquid portion of blood that remains after a clot has formed; it does not prevent clotting.
D. Heparin: Heparin is a natural anticoagulant produced by basophils and mast cells that inhibits the action of thrombin to prevent intravascular clotting.
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