Nervous System Concepts Assessment

This video from IGCSE StudyBuddy covers Part 1 of Topic 14: Coordination and Response. It explains the role of the nervous system in maintaining homeostasis, detailing how neurons transmit electrical impulses for quick communication. The video describes the types of neurons—sensory, relay, and motor—and their functions. It defines key terms like stimulus, receptor, and effector, and distinguishes between voluntary and involuntary responses, focusing on the reflex arc. The video also covers synapses, explaining neurotransmitter function. It concludes with a summary and encourages viewers to engage with the channel.

What is the primary role of the nervous system in organisms?

• To produce hormones

• To circulate blood

• To coordinate and regulate body functions

• To digest food

Which part of the nervous system includes the brain and spinal cord?

• Peripheral nervous system

• Central nervous system

• Autonomic nervous system

• Somatic nervous system

What type of neuron carries impulses from sense organs to the central nervous system?

• Relay neuron

• Motor neuron

• Sensory neuron

• Interneuron

What is a stimulus in the context of the nervous system?

• A muscle contraction

• A type of neuron

• A change in the environment

• A chemical messenger

Which structure detects a stimulus and generates an electrical impulse?

• Synapse

• Effector

• Neuron

• Receptor

What is the difference between voluntary and involuntary responses?

• Voluntary responses are automatic, involuntary are conscious

• Voluntary responses are conscious, involuntary are automatic

• Both are conscious actions

• Both are automatic reactions

What is a reflex arc?

• A pathway for involuntary responses

• A pathway for voluntary actions

• A conscious decision-making process

• A type of neuron

What is the role of synapses in the nervous system?

• To connect muscles to bones

• To ensure impulses travel in one direction

• To produce neurotransmitters

• To store electrical impulses

What are neurotransmitters?

• Types of neurons

• Receptor proteins

• Chemical messengers

• Electrical impulses

How do neurotransmitter molecules cross the synaptic gap?

• By active transport

• By diffusion

• By osmosis

• By electrical impulses