A self-amplifying chain of physiologicalevents is calleda. positive feedback.b. negative feedback.c. dynamic constancy.d. homeostasis.e. metabolism.
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A self-amplifying chain of physiologicalevents is called
a. positive feedback.
b. negative feedback.
c. dynamic constancy.
d. homeostasis.
e.
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Solved in 2 steps
- Positive feedback processes invloves : a) Work in anticipation of changes in regulated variable b) Lead to instability of the regulated variable. c) Tend to force physiological variables back to set point, opposite direction of deviation d) Ten to force physiological variables away from their set point, further deviating itWhich of the following homeostatic control systems anticipate fluctuations in a variable and speed up the response even before it is altered? (a) reflex arc (b) negative feedback (c) feedforward mechanisms (d)positive feedback (e) afferent pathwayWhich of the following is the correct definition of positive feedback? a The process by which the body neglects homeostasis. b A mechanism in which the body's response to a stimulis opposes the stimulus. c A mechanism whereby the body responds to a stimulus by acting to enhance the stimulus d The dynamic equilibrium maintained by an integrating center which causes an effector to respond to the stimulus received by the receptor.
- Which of these statements about homeostasis is true? a.The internal environment is maintained absolutely constant. b.Negative feedback mechanisms act to correct deviations from a normal range within the internal environment. c.Homeostasis is maintained by turning effectors on and off. d.All of these are true.In describing a positive feedback loop, which of the following would be true? a) the sensor and control center are always the same b) the effector signals the control center to shut off the initial stimulus c) the effect shuts off the initial stimulus d) the effect amplifies the initial stimuA) Divergent Process B) Positive Feedback Process C) Negative Feedback Process D) Neutral Process
- give two examples of feedback mechanisms in the human body. identify the type of feedback (negative or positive), the receptor, the control center and effector.In negative feedback, the variable being regulated is changed in the ______ direction, while in positive feedback the variable is changed in the ______ direction. A. same, opposite B. negative, positive C. opposite, same D. decreasing, increasingWhen you have completed this section, you should be able to a. state the characteristics that distinguish living organisms from nonliving objects;b. explain the importance of physiological variation among persons;c. define homeostasis and explain why this concept is central to physiology;d. define negative feedback, give an example of it, and explain its importance to homeostasis;e. define positive feedback and give examples of its beneficial and harmful effects; andf. define gradient, describe the variety of gradients in human physiology, and identify some forms of matter andenergy that flow down gradients.
- What does negative feedback do? a. It establishes a set point. b. It changes the set point. c. It eliminates the set point. d. It reduces discrepancies from a set point.In a homeostatically regulated system, diagram or identify the regulated homeostatic variable, sensor, control center, effector(s), and effector response(s).In a negative feedback loop, the effector produces changes that are a. in the same direction as the change produced by the initial stimulus. b. opposite in direction to the change produced by the initial stimulus. c. unrelated to the initial stimulus.
