Answered: On a particularly busy day, as a…

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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Homeostasis Cases, Set A

Read through each case. Fill in the blanks/spaces below based on the content of the cases.

Case #2:

On a particularly busy day, as a student taking Anatomy and Physiology, I do not have anything to drink from 9:30 am until 6:30 pm. Osmoreceptors in the brain detect the decreased level of water in the blood. These receptors send a signal to the hypothalamus/posterior pituitary, which stimulates the release of antidiuretic hormone (ADH). This hormone acts on the nephron tubules and collecting ducts in the kidney to increase reabsorption of water, which returns that water to the blood. This retention of water has the additional effect of decreasing urinary output. As the fluid levels in the blood stabilize, the release of ADH ends.

What is the variable monitored by this loop?____________
What is the stimulus? ______________________________
What is the control center? __________________________
What is the effector? _______________________________
What is the efferent pathway?_______________________
This is an example of _________ (positive / negative) feedback. How could you tell?

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