1.
State what is meant by a resting potential. [1]
JD SCIENCE
Organisms respond to changes in their internal and external environments
Answer all questions. Show working. Answers are in a separate file on the Worksheets page — do not look at them until you have finished.
2.
State what is meant by an action potential. [1]
3.
State what is meant by saltatory conduction. [1]
4.
State what is meant by a synapse. [1]
5.
State what is meant by negative feedback. [1]
6.
State what is meant by insulin and glucagon. [1]
7.
State what is meant by ADH. [1]
8.
State what is meant by the kidney nephron. [1]
9.
State what is meant by IAA / auxin. [1]
10.
State what is meant by the sliding-filament theory. [1]
11.
Amira is asked about a resting potential in a AQA Biology paper.
(a) Describe a resting potential. [2]
(b) Explain why a resting potential is important in this topic. [3]
12.
Amira is asked about an action potential in a AQA Biology paper.
(a) Describe an action potential. [2]
(b) Explain why an action potential is important in this topic. [3]
13.
Amira is asked about saltatory conduction in a AQA Biology paper.
(a) Describe saltatory conduction. [2]
(b) Explain why saltatory conduction is important in this topic. [3]
14.
Amira is asked about a synapse in a AQA Biology paper.
(a) Describe a synapse. [2]
(b) Explain why a synapse is important in this topic. [3]
15.
Amira is asked about negative feedback in a AQA Biology paper.
(a) Describe negative feedback. [2]
(b) Explain why negative feedback is important in this topic. [3]
16.
Amira is asked about insulin and glucagon in a AQA Biology paper.
(a) Describe insulin and glucagon. [2]
(b) Explain why insulin and glucagon is important in this topic. [3]
17.
Impulse speed 1.2 m in 0.015 s [3]
18.
A neurone diameter doubles (qualitative). Effect on speed [3]
19.
GFR idea: 125 cm³/min. Volume in 1 hour [3]
20.
Blood glucose 5.0 to 7.5. Percentage increase [3]
21.
Sarcomere 2.4 µm to 2.0 µm. Percentage shortening [3]
22.
A reflex path is 1.8 m at 60 m/s. Time [3]
23.
Amira carries out a AQA-style required practical linked to control, coordination and homeostasis. This is a typical AQA required-practical style question.
(a) Identify the independent variable and the dependent variable. [2]
(b) State one control variable and explain why it must be controlled. [2]
(c) Suggest one improvement or source of error and how it affects the result. [2]
24.
Amira carries out collecting valid data for control, coordination and homeostasis. This is a typical AQA required-practical style question.
(a) Identify the independent variable and the dependent variable. [2]
(b) State one control variable and explain why it must be controlled. [2]
(c) Suggest one improvement or source of error and how it affects the result. [2]
25.
Amira carries out drawing a graph for control, coordination and homeostasis. This is a typical AQA required-practical style question.
(a) Identify the independent variable and the dependent variable. [2]
(b) State one control variable and explain why it must be controlled. [2]
(c) Suggest one improvement or source of error and how it affects the result. [2]
26.
Amira carries out evaluating a method about control, coordination and homeostasis. This is a typical AQA required-practical style question.
(a) Identify the independent variable and the dependent variable. [2]
(b) State one control variable and explain why it must be controlled. [2]
(c) Suggest one improvement or source of error and how it affects the result. [2]
27.
Compare a resting potential with an action potential. [4]
28.
Compare an action potential with saltatory conduction. [4]
29.
Compare saltatory conduction with a synapse. [4]
30.
Compare a synapse with negative feedback. [4]
31.
Apply your knowledge of ADH to this situation: more aquaporins, less urine [3]
32.
Apply your knowledge of the kidney nephron to this situation: water potential gradient [3]