Exam (elaborations)
Unit 5 BTEC Applied Science January 2022
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Pearson BTEC Level 3 Nationals Diploma, Extended DiplomaPlease check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Learner Registration Number
Time 50 minutes
Paper
reference 31627H/1B
Applied Science
UNIT 5: Principles and Applications of Science II
Biology
SECTION A: ORGANS AND SYSTEMS
You must have: Total Marks
A calculator and a ruler.
Instructions
• Use black ink or ball-point pen.
• centre
Fill in the boxes at the top of this page with your name,
number and learner registration number.
• Answer allthequestions.
Answer
• – there may bequestions in the spaces provided
more space than you need.
Information
• The exam comprises three papers worth 40 marks each.
Section A: Organs and systems (Biology).
Section B: Properties and uses of substances (Chemistry).
Section C: Thermal physics, materials and fluids (Physics).
• The total mark for this exam is 120.
• The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
Advice
• Read each question carefully before you start to answer it.
• Checkanswer
Try to every question.
• your answers if you have time at the end.
Turn over
*P64270RA0116*
P64270RA
©2021 Pearson Education Ltd.
1/1/1/1/1/1/1/1/1/e2/
, Answer ALL questions. Write your answers in the spaces provided.
Some questions must be answered with a cross in a box . If you change your mind about
an answer, put a line through the box and then mark your new answer with a cross .
1 Figure 1 shows a kidney nephron and its associated blood vessels.
proximal convoluted tubule (PCT)
efferent
arteriole A
collecting
duct
afferent
arteriole
r
la
renal vein
FpT
Source: © John Bavosi / Science Photo Library
Figure 1
(a) Identify structure A in Figure 1.
emA
(1)
................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
exR
D
2
, (b) Table 1 shows the functions of some parts of a nephron.
Complete Table 1 to show the functions of the PCT and the renal vein.
(2)
Region of nephron Function
PCT
A ultrafiltration of blood
collecting duct reabsorption of water
renal vein
Table 1
(c) Name the hormone that regulates the reabsorption of water in the collecting duct.
r
(1)
a
................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(d) The efferent arteriole, in structure A in Figure 1, has a smaller diameter than the
pTl
afferent arteriole.
mF
Explain how the difference in diameters helps the process of ultrafiltration.
(2)
xReA
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................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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