1 Name three hormones involved in controlling the level of glucose in the blood and state the effect of each on the level of glucose. Figure 2 shows the relative concentrations of three substances in the filtrate as it passes along the nephron. (NB the scale is not linear.) 2 Urea is a waste product of the body that is removed by the kidneys. The quantity of urea in the filtrate entering the nephron does not change significantly as the filtrate passes along the nephron. Explain why the level of urea shown in Figure 2 rises considerably as the filtrate passes along the nephron. 3 Suggest the name of substance A and explain the reasons for your answer. 4 Suggest the name of substance B and explain the reasons for your answer. 5 One symptom of diabetes is dehydration. From your knowledge of how water is reabsorbed in the collecting ducts, explain why diabetes might cause dehydration.
1 Name three hormones involved in controlling the level of glucose in the blood and state the effect of each on the level of glucose. Figure 2 shows the relative concentrations of three substances in the filtrate as it passes along the nephron. (NB the scale is not linear.) 2 Urea is a waste product of the body that is removed by the kidneys. The quantity of urea in the filtrate entering the nephron does not change significantly as the filtrate passes along the nephron. Explain why the level of urea shown in Figure 2 rises considerably as the filtrate passes along the nephron. 3 Suggest the name of substance A and explain the reasons for your answer. 4 Suggest the name of substance B and explain the reasons for your answer. 5 One symptom of diabetes is dehydration. From your knowledge of how water is reabsorbed in the collecting ducts, explain why diabetes might cause dehydration.
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Transcribed Image Text:1 Name three hormones involved in controlling the
level of glucose in the blood and state the effect of
each on the level of glucose.
100
Figure 2 shows the relative concentrations of three
substances in the filtrate as it passes along the
nephron. (NB the scale is not linear.)
urea
20
2 Urea is a waste product of the body that is
removed by the kidneys. The quantity of urea in
the filtrate entering the nephron does not change
significantly as the filtrate passes along the
nephron. Explain why the level of urea shown in
Figure 2 rises considerably as the filtrate passes
along the nephron.
3 Suggest the name of substance A and explain the
5.0
1.0
Substance
A
0.2-
0.05
reasons for your answer.
4 Suggest the name of substance B and explain the
Substance
reasons for your answer.
0.01
5 One symptom of diabetes is dehydration. From
your knowledge of how water is reabsorbed in the
collecting ducts, explain why diabetes might cause
dehydration.
Proximal
convoluted
tubule
Loop
of
Henle
Distal
convoluted
tubule
Collecting
duct
part of nephron
A Figure 2 Relative concentrations of three substances in
the filtrate as it passes along a nephron. NB Scale is not linear
concentration of substances in the filtrate relative
to concentration in the renal capsule / arbitrary units
Descending
quil
Ascending
qwij
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