Fig. 9.1 gives some details of a reflex action. A person puts a hand on a hot pan. Electrical impulses move to the central nervous system, which brings about a response. The arm muscles contract rapidly.
(a(i))[1]
State the name of the stimulus shown in the example in Fig. 9.1.
(a(ii))[1]
State the name of the effector shown in the example in Fig. 9.1.
(a(iii))[2]
State the names of the two parts that make up the central nervous system.
(b)[3]
Fig. 9.2 shows diagrams of three kinds of neurones. State the names of the three types of neurones on the lines provided in Fig. 9.2.
(c)[1]
State the name given to the junction linking two neurones.
Worked solution & mark scheme
This 8-mark question has a full step-by-step worked solution and mark scheme. One marking point: “temperature change / heat / hot pan” …