Biology Grade 12 Neuron Quiz eot

What are the main parts of a neuron and their functions?

• Dendrites, cell body, axon, and axon terminals

• Nucleus, mitochondria, ribosomes, and cytoplasm

• Blood, heart, lungs, and brain

• Roots, stem, leaves, and flowers

Explain the difference between sensory neurons, motor neurons, and interneurons.

• Sensory neurons transmit signals from the central nervous system to muscles and glands

• Interneurons transmit signals from muscles and glands to sensory receptors

• Motor neurons transmit signals from sensory receptors to the central nervous system

• Sensory neurons transmit signals from sensory receptors to the central nervous system, motor neurons transmit signals from the central nervous system to muscles and glands, and interneurons relay signals between neurons within the central nervous system.

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

• Causes nerve impulses to slow down

• Insulates and speeds up the transmission of nerve impulses

• Provides structural support to the neuron

• Prevents the transmission of nerve impulses

How does the myelin sheath affect the speed of nerve impulse transmission?

• It only affects the strength of the nerve impulse, not the speed.

• It decreases the speed of nerve impulse transmission.

• It increases the speed of nerve impulse transmission.

• It has no effect on the speed of nerve impulse transmission.

What are neurotransmitters and how do they function in neuron communication?

• Neurotransmitters are chemical messengers that transmit signals across the synapse from one neuron to another by binding to specific receptors on the receiving neuron.

• Neurotransmitters are produced by the endocrine system

• Neurotransmitters are electrical signals that travel along the axon of a neuron

• Neurotransmitters are only found in the brain and spinal cord

Explain the process of synaptic transmission in neuron communication.

• Synaptic transmission occurs through direct physical connection between neurons

• Neurotransmitters are released from the postsynaptic neuron and bind to receptors on the presynaptic neuron

• The process of synaptic transmission involves the release of hormones from the presynaptic neuron

• The process of synaptic transmission involves the release of neurotransmitters from the presynaptic neuron, which then bind to receptors on the postsynaptic neuron, leading to the generation of a new electrical signal.

Why is the synapse important in neuron communication?

• It is where the neuron stores energy

• It is responsible for producing hormones in the body

• It is the junction where one neuron can transmit a signal to another neuron or to a muscle or gland cell.

• It is only important in the peripheral nervous system

Describe the role of synaptic plasticity in learning and memory.

• Synaptic plasticity is only important for motor function

• Synaptic plasticity has no role in learning and memory

• Synaptic plasticity only occurs in non-neuronal cells

• Synaptic plasticity allows for the formation and strengthening of neural connections, which is essential for learning and memory.