AQA - Biology - Nervous System

What is the primary function of a neuron?

• To transport oxygen in the blood

• To transmit electrical signals

• To produce hormones

• To digest food

Which part of the neuron receives incoming signals?

• Axon

• Dendrites

• Myelin sheath

• Synapse

What is the main role of the central nervous system (CNS)?

• To control voluntary and involuntary actions

• To transport nutrients throughout the body

• To produce red blood cells

• To store fat

Which of the following is NOT a part of the central nervous system?

• Brain

• Spinal cord

• Nerves

• Cerebellum

What is the primary function of the peripheral nervous system (PNS)?

• To process information in the brain

• To connect the CNS to limbs and organs

• To produce neurotransmitters

• To regulate blood pressure

Which of the following best describes the role of neurotransmitters?

• They are enzymes that break down food

• They are chemicals that transmit signals across a synapse

• They are cells that fight infections

• They are proteins that build muscle

What is the function of the myelin sheath in a neuron?

• To protect the neuron from pathogens

• To speed up the transmission of electrical signals

• To store neurotransmitters

• To provide nutrients to the neuron

Which part of the neuron is responsible for transmitting signals to other neurons or muscles?

• Axon

• Dendrites

• Cell body

• Nucleus