Answered: Generally, for a positive feedback arc…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Related questions

Question

Generally, for a positive feedback arc to cause a change of a physiological variable, where must be the receptor?

Multiple answers: Choose all of the relevant answers from the choices below.

answer choices

a)Intracellular fluid

b)Intersitial fluid

c)Extracellular fluid

d)External environment (e.g., mother's nipple)

e)Blood plasma

2)Which of the following is NOT true regarding negative feedback loops and homeostasis?

answer choices

a. Homeostatic control systems cannot maintain complete constancy of the internal environment

b. The set point of some variable can be reset

c. It is always possible for physiological variables to be maintained in a relatively constant manner using homeostatic control systems

d. The stability of an internal environment variable is achieved by balancing inputs and outputs

e. In negative feedback systems, a change in the variable being regulated brings about responses that tend to move the variable in a direction that is opposite to the original direction of change

3)true/false All excitable cell membranes have leak channels.

Expert Solution

Step 1

Homeostasis is maintained by feedback loops, which are biological systems. When the product or output of an event or reaction alters the organism's reaction to that event or reaction, this occurs. Positive feedback happens when a change or output is increased: the outcome of a reaction is amplified to make it happen faster.