Skip to content

Course home

Question bank·2.3 The nervous system and brain
Sign up

2.3 The nervous system and brain

EasyMediumHard
1234567891011121314151617181920212223242526272829303132333435363738394041424344
Question 18

A nervous pathway controls secretion by a gland. Neurones P, Q and R are connected in this order by synapses. R is a motor neurone connected to the gland.

In one person, the receptor molecules on R at the synapse between Q and R are not complementary to the neurotransmitter released by Q.

An electrical impulse reaches the end of P.

a.

Describe how the signal is transmitted from P to Q.

[4]
b.

Explain why the gland does not secrete when the electrical impulse reaches the end of P.

[3]
Markscheme

2.3 The nervous system and brain Questions

  1. GCSE
  2. /Biology
  3. /2.3 The nervous system and brain

111 exam-style questions on Edexcel GCSE Biology 2.3 The nervous system and brain, covering 2.3.1 Structures and functions of the brain, 2.3.2 Imaging brain function with scanning, 2.3.3 Limitations in treating nervous system damage, 2.3.4 Neurones and impulse transmission, and 2.3.5 Structure and function of a reflex arc. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank