Neurons: Parts and Functions video-quiz

What is the main function of neurons in the human body?

• Allow information to travel throughout the body

• Pump blood through the body

• Break down food for energy

• Filter waste from the blood

Which of the following activities is made possible by neurons?

• Moving muscles

• Growing hair

• Digesting food

• Producing hormones

Dendrites are often compared to which part of the human body due to their appearance?

• Toes

• Ears

• Fingers

• Eyes

What are the chemical messengers called that neurons use to communicate?

• Hormones

• Enzymes

• Neurotransmitters

• Antibodies

What is the primary function of acetylcholine as a neurotransmitter?

• Controls our muscles

• Acts as a pain reliever

• Regulates mood

• Increases heart rate

Explain how neurotransmitters contribute to communication between neurons and give an example of a neurotransmitter and its function.

• Neurotransmitters are chemical messengers that transmit signals across synapses; for example, dopamine is involved in reward-seeking and pleasure.

• Neurotransmitters are electrical signals that travel through nerves; for example, serotonin controls muscle movement.

• Neurotransmitters are hormones released into the bloodstream; for example, acetylcholine increases heart rate.

• Neurotransmitters are proteins that build cell walls; for example, endorphins regulate sleep.

What is the function of a receptor site on a dendrite?

• To receive neurotransmitters like a lock and key

• To generate electrical impulses

• To produce hormones

• To store genetic information

After a neurotransmitter binds to a receptor site on a dendrite, where is the signal integrated and interpreted?

• Soma

• Axon terminal

• Myelin sheath

• Synaptic cleft

Which part of the neuron is responsible for receiving signals from other neurons?

• Dendrite

• Axon

• Soma

• Nucleus

Explain how the lock and key analogy applies to neurotransmitter binding at the receptor site. (DoK Level 2)

• The neurotransmitter fits specifically into the receptor site, similar to how a key fits into a lock, ensuring only certain signals are received.

• The neurotransmitter randomly attaches to any part of the neuron.

• The receptor site changes shape to fit any neurotransmitter.

• The neurotransmitter and receptor site merge into one structure.