iGCSE Biology 2j: Nerves and synapses

What is a synapse?

• A junction between two neurones

• A cell that generates an electrical impulse

• A response to a stimulus

• An effector

How are impulses transmitted across synapses?

• Using an electrical impulse

• Using a chemical neurotransmitter

• Using a nerve

• Using a hormone produced by a gland

State the missing term: Stimulus -> ...? ->Coordinator

• Motor neurone

• Response

• Effector

• Receptor

The coordinator is always:

• Sensory neurone

• Motor neurone

• Central nervous system (CNS)

• A receptor

What is the central nervous system (CNS)?

• The brain and pancreas

• The muscles and glands

• The brain and spinal cord

• The receptors and effectors

Which neurone synapses with effectors?

• Sensory

• Relay

• Motor

Effectors are always:

• Muscles / Glands

• Muscles / Bones

• Glands / Bones

• Bones / Nerves

When burning a finger on a hot stove, the effector would potentially be:

• Motor neurone

• CNS

• Bicep muscle

• Sensory neurone

How do neurones ensure the nerve impulse can only travel in one direction?

• By having the cell body at one end of the cell

• By having the cell surrounded by a myelin sheath

• By having receptors at one end of the cell

• By only releasing neurotransmitters from the presynaptic membrane

Nerve impulses are:

• Electricity

• Electrical

• Energetic

• Electricuted