COAS Biology 2 Teacher ResourcesOriginal material © Cambridge University Press 20091
15 End-of-chapter test
1Figure 15.3 shows the major components of the mammalian nervous system.
Identify components A–E from the list below.
autonomic nervous system
cerebellum
spinal cord
cerebrum
peripheral nervous system[5]
Figure 15.3
OCR Biology A (2805/5) January 2004
2aExplain clearly, giving one example of each, what is meant by the following terms:
ireflex action[3]
iiconditioned reflex[3]
To enable the human heart to respond
appropriately to changing demands,
its action is regulated by antagonistic
nerve pathways. Figure 15.4 illustrates
a mechanism for the control of heart
rate by the autonomic nervous system.
Figure 15.4
bWith reference to Figure 15.4,
istate the part of the brain in which the cardiac inhibitory centre is found[1]
iistate the name and function of the tissue labelled X.[2]
cThe heart rate increases during exercise and gradually returns to the resting rate after
exercise has stopped. Describe how the autonomic nervous system controls the heart
rate during and after exercise.[7]
OCR Biology A (2805/5) June 2002
3Figure 15.5 shows a vertical section of the human brain.
Figure 15.5
aName the regions of the brain labelled D, E, F and G.[4]
bState one function of each of the regions D, E, F and G.[4]
4Figure 15.6 shows two
bones meeting and
forming a synovial
joint at the human elbow.
Figure 15.6
aName the type of synovial joint shown in the diagram.[1]
bName the tissue labelled X.[1]
cOutline the roles of the structures shown in the diagram, including tissue X, during the movement of the arm. [7]
5Figure 15.7 represents part of a muscle fibril (myofibril).
Figure 15.7
aiName two proteins found in the I band.[2]
iiUsing a bracket, label onesarcomere on a sketch of Figure 15.7.[1]
iiiState two pieces of evidence shown on Figure 15.7 which indicate that the myofibril
is shown in the relaxed state.[2]
bDuring strenuous exercise, the concentration of hydrogen ions in muscle tissue increases.
A high concentration of hydrogen ions reduces the ability of calcium ions to bind to
proteins in the myofibrils.
Using this information, explain how the increased concentration of hydrogen ions results
in a reduction in the force of contraction of a muscle.[5]
OCR Biology A (2805/5) January 2005
6Figure 15.8 shows a neuromuscular junction.
Figure 15.8
aName the structures P, Q and R.[3]
bUsing the information in Figure 15.8, describe and explain how an impulse in the motor neurone stimulates contraction of the myofibril. [7]
Nicotine acts at some neuromuscular junctions to stimulate muscles to contract.
cSuggest a way in which nicotine may act at neuromuscular junctions to have this effect.[2]
OCR Biology A (2805/5) June 2002
Total: Score: %
Grade boundaries: 80% A, 70% B, 60% C, 50% D, 40% E
COAS Biology 2 Teacher ResourcesOriginal material © Cambridge University Press 20091