Biology 9700 · AS & A Level · Homeostasis in mammals
Homeostasis in mammals — practice question
The mammalian kidney is one organ that helps to maintain homeostasis.
(a)[1]
Explain what the term homeostasis means.
(b(i))[2]
Using Fig. 1.1, identify structures A and B.
(b(ii))[3]
On Fig. 1.1, use label lines and letters to show where:
U - ultrafiltration takes place
L - the loop of Henle is located
C - blood urea concentration is low.
(c)[5]
Describe the roles of the hypothalamus and the posterior pituitary in osmoregulation.
Worked solution & mark scheme
This 11-mark question has a full step-by-step worked solution and mark scheme. One marking point: “keep / maintain / restore a constant / stable internal environment within narrow limits (homeostasis)” …