Judgments
Principles of Homeostasis and Negative Feedback QP.pdf
- Course
- Institution
Principles of Homeostasis and Negative Feedback QP.pdf
[Show more]
Seller
Follow
Studyabroad
Content preview
AQAA-Level
BIOLOGY
Organisms Respond to Changes in Environments
Principles of Homeostasis and Negative Feedback
Time allowed
59 minutes
QUESTION PAPER
Score Percentage
/49 %
4.1 | CELL BIOLOGY | QUESTION PAPER 1 1
,(a) The control of water balance in the body involves negative feedback.
(i) Describe what is meant by negative feedback.
...............................................................................................................
...............................................................................................................
...............................................................................................................
(1)
(ii) Water is removed from the body via the kidneys. Give two other ways in which
water is removed from the body.
1 ............................................................................................................
2 ............................................................................................................
(2)
(iii) Name the part of the brain which acts as the coordinator in the control of water
balance.
...............................................................................................................
(1)
(b) Figure 1 shows the cells lining the collecting duct in a human kidney. ADH
molecules bind to the receptor proteins and this triggers the vesicles containing
aquaporins to bind with the plasma membrane next to the lumen. Figure 2 shows
an aquaporin which is a large channel protein.
Figure 1
, Figure 2
(i) From which gland is ADH released?
...............................................................................................................
(1)
(ii) Use the information given to explain how ADH increases the movement of
water from the lumen of the collecting duct into the blood.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Studyabroad. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
77973 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now