100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Previously searched by you
Previously searched by you
logo
Biology Aqa A Level Common Questions Containing 87 Terms with Definitive Solutions . $20.99
Add to cart
Quickly navigate to
Preview
  2.  
  3. Biology Aqa A Level Common Qustions Containing 87
  4.  
  5. Biology Aqa A Level Common Qustions Containing 87

Exam (elaborations)

Biology Aqa A Level Common Questions Containing 87 Terms with Definitive Solutions .

1 review
 5 purchases
  • Course
  • Biology Aqa A Level Common Qustions Containing 87
  • Institution
  • Biology Aqa A Level Common Qustions Containing 87

Biology Aqa A Level Common Questions Containing 87 Terms with Definitive Solutions . Terms like; give two factors other than age and gender that would affect the concentration of creatinine in the blood? - Answer: muscle/ body mass ethnicity

Preview 3 out of 30  pages

Document information

  • April 6, 2024
  • 30
  • 2023/2024
  • Exam (elaborations)
  • Questions & answers

Subjects

  • biology aqa a level common questions containing 87

Written for

  • Biology Aqa A Level Common Qustions Containing 87
  • Biology Aqa A Level Common Qustions Containing 87

1  review

review-writer-avatar

By: Benzo • 2 days ago

Seller

avatar-seller
docmickey

Reviews received

Content preview

Biology aqa A level common questions




Biology Aqa A Level Common Questions
Containing 87 Terms with Definitive
Solutions 2024-2025.
give two factors other than age and gender that would affect the concentration of
creatinine in the blood? - Answer: muscle/ body mass
ethnicity

, Biology aqa A level common questions


Explain how the cells of the collecting duct are able to absorb water from the
filtrate through the protein channels in their plasma membranes? - Answer: lower
w.p/ more negative inside tubule cells so h2o enters by osmosis


Suggest why diabetes insipidus is more common in males? - Answer: Bc males
only have X chromosome do not have Y chromosome single copy of recessive
allele will be expressed


A recessive allele which has harmful effects is able to reach a higher frequency in a
population than a harmful dominant allele. Explain how? - Answer: recessive
allele can be carried by individuals showing effects dominant alley always
expressed
organisms that are affected are more likely to reproduce therefore recessive
alleles are more likely to be passed on


In some forms of kidney disease, proteins from the blood plasma are found in the
urine. Which part of the nephron would have been damaged by the disease to
cause proteins from blood plasma to be present in the urine? Explain your answer
- Answer: glomerulus/ bowman’s capsule
basement membrane
proteins are large molecules cannot normally pass through filter
can only pass through if filter damaged


Describe the role of the hormone glucagon in the control of blood sugar
concentration? - Answer: glucagon binds to specific receptor on liver cells

, Biology aqa A level common questions


activation of enzymes in liver
hydrolysis of glycogen
F.D of glucose out of liver cells
increases blood glucose levels


Explain two ways in which the cells of the proximal convoluted tubule are adapted
for reabsorption.? - Answer: microvilli provide a large S.A for reabsorption
carrier proteins in membrane for A.T
channel proteins for F.D
many mitochondria for A.T and providing Atp


Explain the role of the loop of Henle in the absorption of water from the filtrate? -
Answer: in the ascending limb na+ ions actively transported
ascending limb impermeable to water
in descending limb na+ ions diffuse in
descending limb h2o moves out
low w.p (high conc of ions in medulla) the longer the loop, lower w.p in medulla
h2o leaves collecting duct by osmosis down w.p gradient


Explain the role of ADH in the production of concentrated urine? - Answer: when
w.p of blood too low it is detected by receptors in hypothalamus
pituitary secretes releases more ADH
ADH increases permeability opens channels for h2o in DCT
more h2o reabsorbed into blood by osmosis down w.p gradient

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

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

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

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 docmickey. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $20.99. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

69252 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 15 years now

Start selling
$20.99  5x  sold
  • (1)
Add to cart
Added