Poll

Do you trust the mainstream media?
  • 100% of the time
  • 75% of the time
  • 50% of the time
  • 25% of the time
  • Never
If you would like to vote in this poll, please login or register.
New Topic  
wrote...
Posts: 9
Credits: 6
Rep: 0 0
3 years ago
HW Help:
When we begin to become dehydrated, we usually become thirsty, which causes us to drink fluids. Based on what you know about homeostatic systems, decide whether the thirst sensation is part of a negative or positive feedback control system and defend your choice.
  • Read 806 times
  • 1 Reply
replies
solved
wrote...
Posts: 9
Credits: 3
Rep: 0 0
3 years ago
To view this post and more
You'll need to login or register
Negative feedback.
This is because when you are dehydrated it results in low blood pressure which in turn results in renin release from the juxtaglomerular apparatus. Renin reacts with angiotensinigen to become angiotensin 1 and then is converted to angiotensin 2 in the lungs. Angiotensin 2 causes a variety of effects, one being to stimulate the thirst center within the brain which causes the feeling of thirst and results in increased water intake. Once water has been intaken and blood pressure increases, this pathway is stopped, thus making it a negative feedback mechanism.
New Topic      
Related Topics
This topic is currently locked from adding new posts. Only administrators and moderators can reply. If you'd like to contribute to this topic, start a new thread and make reference to this one. Otherwise, contact a moderator for more options.

Control Panel

Click to Ask a Question
745 Students and 54 members are standing by to answer your homework problems, free. So far today, 319 guests have joined.
Ask a Question Add Gallery Image Add New Term
Dictionary
Search Images
Free PubMed Mathematics Tools Equation Balancer Play a Game
Related Images
1042
0
06/24/11

2637
0
02/17/12

115592
5
11/10/14