Biology 9700/42 — October/November 2021
Cambridge A-Level · A Level Structured Questions · worked solutions for every part, with the mark scheme
Topics Homeostasis · Control and Coordination · Inheritance · Classification, Biodiversity and Conservation · Photosynthesis · (outdated) Crop Plants · +3 more
The Bowman’s capsule of a nephron is involved in ultrafiltration.
Fig. 1.1 is a diagram of part of a Bowman’s capsule and glomerulus.
With reference to Fig. 1.1, complete Table 1.1 using the letters A – F.
Each letter may be used once, more than once or not at all.
Table 1.1
| feature | letter |
|---|---|
| glomerular filtrate | ................... |
| basement membrane | ................... |
| podocyte cell | ................... |
| capillary endothelial cell | ................... |
Describe and explain how the structures in the Bowman’s capsule and its associated blood supply are adapted to allow ultrafiltration to take place.
The glomerular filtration rate (GFR) is the rate at which blood plasma is filtered in the Bowman’s capsule.
Fig. 1.2 shows the relationship between GFR and mean renal arterial blood pressure.
Comment on the relationship between GFR and mean renal arterial blood pressure.
Suggest one reason why the GFR of a person might decrease.
The rest of this paper
9 more questions- Q2Classification, Biodiversity and Conservation · Photosynthesis11M
- Q3Control and Coordination · (outdated) Crop Plants12M
- Q4Genetic Technology · Inheritance12M
- Q5Classification, Biodiversity and Conservation12M
- Q6Energy and Respiration12M
- Q7Inheritance9M
- Q8Selection and Evolution5M
- Q9Homeostasis · Control and Coordination15M
- Q10Homeostasis · Inheritance · Control and Coordination15M