Year 12 Biopsychology Quiz

What is the function of sensory neurons?

• Carry messages from the CNS to effectors

• Connect sensory neurons to motor neurons

• Carry messages from the PNS to the CNS

• Connect the CNS to effectors

What is the role of relay neurons?

• Carry messages from the CNS to effectors

• Connect sensory neurons to motor neurons

• Carry messages from the PNS to the CNS

• Connect the CNS to effectors

What is the purpose of the myelin sheath?

• To protect the axon

• To speed up electrical transmission

• To connect neurons in neural networks

• To convert chemical messages into electrical impulses

What happens when a neuron is activated by a stimulus?

• The inside of the cell becomes negatively charged

• The inside of the cell becomes positively charged

• The dendrites carry impulses away from the cell body

• The axon carries impulses towards the cell body

What is the role of neurotransmitters in synaptic transmission?

• To carry electrical impulses between neurons

• To convert electrical impulses into chemical messages

• To speed up the transmission of electrical impulses

• To relay signals across the synapse from one neuron to another

What determines whether a postsynaptic neuron fires?

• The direction of travel of neurotransmitters

• The presence of myelin sheath on the axon

• The sum of excitatory and inhibitory signals

• The location of the cell body in the CNS

Which neurotransmitter causes inhibition in the receiving neuron?

• Acetylcholine

• Adrenaline

• Serotonin

• Dopamine

What is the process of summation in synaptic transmission?

• The conversion of chemical messages into electrical impulses

• The speed up of electrical transmission along the axon

• The summing of excitatory and inhibitory influences

• The release of neurotransmitters from synaptic vesicles

What is the function of dendrites in a neuron?

• To carry impulses away from the cell body

• To carry impulses towards the cell body

• To protect the neuron

• To speed up electrical transmission

What is the function of motor neurons?

• Carry messages from the CNS to effectors

• Connect sensory neurons to motor neurons

• Carry messages from the PNS to the CNS

• Connect the CNS to effectors