For each variety of reflex A–E, select the best option from the examples in the following list

A. Option 4 The knee jerk. This is a spinal reflex with two neurones. The afferent nerve from the muscle spindle synapses with a motor fibre in the anterior horn of the spinal cord

. B. Option 2 The withdrawal reflex. This reflex has more than two synapses in the reflex pathway.

C. Option 3 Salivation on seeing or thinking about food. This is a learned reflex that can be reinforced or inhibited by learned experience and involves the cerebral cortex.

D. Option 5 The baroreceptor reflex. This reflex is inborn and is not modified by learned experiences.

E. Option 1 Nerve-mediated skin vasodilatation following skin damage. An axon reflex is a local reflex that does not involve the spinal cord. Stimulation of a sensory nerve receptor results in a local response mediated by a local branch of the sensory nerve.