Understanding Neurons and Nerve Impulses

The video tutorial explains the role of neurons in control and coordination in animals. It details the structure of a neuron, including components like the cyon, dendrites, and axon. The process of nerve impulse transmission is described, highlighting how stimuli trigger chemical reactions that create electrical impulses, which travel through neurons and synapses to communicate with other nerve cells.

What is the primary function of neurons in animals?

• To digest food

• To control and coordinate activities

• To transport oxygen

• To provide energy

Where are the receptors that detect environmental information usually located?

• In the heart

• In the brain

• In the sense organs

• In the muscles

What is the structural and functional unit of the nervous system?

• Blood cell

• Bone cell

• Neuron

• Muscle cell

What is the granular cytoplasm of a neuron called?

• Nucleoplasm

• Neuroplasm

• Cytosol

• Protoplasm

What is the primary function of an axon?

• To protect the neuron

• To store nutrients

• To conduct nerve impulses away from the cell body

• To produce hormones

What covers the axon and possesses nodes of Ranvier?

• Cell membrane

• Dendrites

• Medary sheath

• Nissl's granules

How does a nerve impulse begin in a neuron?

• By a chemical reaction at the dendritic tip

• By a magnetic field

• By a mechanical force

• By a thermal change

What happens at the end of an axon when an electrical impulse arrives?

• The axon changes color

• The axon absorbs water

• The axon releases chemicals

• The axon shrinks

What is the gap between two neurons called?

• Neurolemma

• Dendrite

• Axon terminal

• Synapse

What allows the delivery of nerve impulses from neurons to other nerve cells?

• Bone marrow

• Muscle fibers

• Synapse

• Blood vessels