Edexcel IAL Nervous system and Neurones

Which part of the nervous system controls voluntary movements?

• Somatic nervous system

• Autonomic nervous system

• Sympathetic nervous system

• Parasympathetic nervous system

What is the term for a bundle of axons in the peripheral nervous system?

• Nerve

• Ganglion

• Tract

• Nucleus

What is the role of dendrites in a neuron?

• To receive incoming signals from other neurons

• To transmit signals away from the cell body

• To produce neurotransmitters

• To insulate the axon and speed up signal transmission

Which part of a neuron carries impulses away from the cell body?

• Axon

• Dendrite

• Cell body

• Myelin sheath

What is the basic functional unit of the nervous system?

• Neuron

• Glial cell

• Axon

• Dendrite

What is the term for the brief reversal of membrane potential that propagates along an axon?

• Action potential

• Resting potential

• Threshold potential

• Synaptic potential

What is the function of neurotransmitters?

• To transmit signals between neurons at synapses

• To insulate axons and speed up signal transmission

• To receive incoming signals from other neurons

• To produce electrical impulses in neurons

What is the term for the insulating layer that surrounds some axons and speeds up signal transmission?

• Myelin sheath

• Axon terminal

• Synapse

• Node of Ranvier

Which part of the brain is responsible for coordinating muscle movements and maintaining balance?

• Cerebellum

• Cerebrum

• Brainstem

• Thalamus

What is the function of the myelin sheath?

• To insulate axons and speed up signal transmission

• To transmit signals between neurons at synapses

• To produce neurotransmitters

• To receive incoming signals from other neurons