This 50-slide powerpoint presentation covers 'Topic 6.5 - Neurons & Synapses' in the 2016 IB Biology curriculum. Each slide includes the specific learning objective as well as key that students should note. The topic has been divided into four sections:
A - Neurons
B - Action Potentials
C - Synapses
D - Acetylcholine
The presentation itself contains minimal information as it is intended to be used with
teacher guidance. They are also formatted to be visually pleasing and to print well for handouts or revision. Most sections end with a series of review questions for your students to go through. Please see the preview file for an idea of the slide aesthetic and level of detail.
As always, please let me know if you have any suggestions for improvements. These are always a work in progress!
U1: Neurons transmit electrical impulses.
U2: The myelination of nerve fibres allows for saltatory conduction.
U3: Neurons pump sodium and potassium ions across their membranes to
generate a resting potential.
U4: An action potential consists of depolarization and repolarization of the neuron.
U5: Nerve impulses are action potentials propagated along the axons of neurons.
U6: Propagation of nerve impulses is the result of local currents that cause each
successive part of the axon to reach the threshold potential.
U7: Synapses are junctions between neurons and between neurons and receptor
or effector cells.
U8: When presynaptic neurons are depolarized they release a neurotransmitter
into the synapse.
U9: A nerve impulse is only initiated if the threshold potential is reached.
A1: Secretion and reabsorption of acetylcholine by neurons at synapses.
A2: Blocking of synaptic transmission at cholinergic synapses in
insects by binding of neonicotinoid pesticides to acetylcholine receptors.
S1: Analysis of oscilloscope traces showing resting potentials and action