IGCSE Paper 1 and 2 questions on Co-ordination and response

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1) The diagram represents a simple reflex arc.


What is the sequence of nerve cells through which an impulse passes during a reflex action?

2) The diagram shows a neurone.


3) What will be the effect of strenuous exercise on the volume of water lost through the skin and the kidneys?

4) Which labelled part of the eye contains muscle?

5) 


6) 
7) The diagram shows the skin.
Which labelled structure releases sweat?

8) What is a synapse?
A a junction between two neurones
B a relay neurone
C an effector
D an electrical signal

9) The diagram shows a simple reflex arc.
Which labelled part is the sensory neurone?

10) Some structures in the eye are listed.
1 cornea
2 iris
3 lens
4 retina
Which structures contain light receptors?
A 1, 2 and 3                     B 2, 3 and 4                     C 2 and 4 only                     D 4 only

11) The components of a reflex arc are shown in the flow diagram.

receptor → sensory neurone → synapse → relay neurone → synapse → motor neurone → effector

Which component is responsible for ensuring that the nerve impulses travel in one direction only?
A motor neurone
B receptor
C sensory neurone
D synapse

12) Which statement about light receptors in the retina of a normal human eye is correct?
A The cones only work in dim light.
B The rods are found in the fovea.
C There are three types of cone.
D There are three types of rod.

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