Transmission of Nerve Impulse A Level Biology Quiz

What are the three main parts of a neuron?

• Synapse, neurotransmitter, and myelin sheath

• Nucleus, mitochondria, and cytoplasm

• Spinal cord, brain, and peripheral nerves

• Dendrites, cell body, and axon

Describe the function of the dendrites and axon in a neuron.

• Regulate body temperature

• Produce hormones

• Receive and transmit signals

• Store nutrients

What is the resting membrane potential of a neuron?

• -70 millivolts (mV)

• -50 millivolts (mV)

• 0 millivolts (mV)

• -90 millivolts (mV)

Explain the process of depolarization and repolarization during an action potential.

• Depolarization and repolarization are the processes of changing the cell's color during an action potential.

• Depolarization and repolarization are the processes of increasing and decreasing the cell's size during an action potential.

• Depolarization and repolarization are the processes of changing and restoring the cell's membrane potential during an action potential.

• Depolarization and repolarization are the processes of heating and cooling the cell during an action potential.

What is the role of calcium ions in synaptic transmission?

• Regulating the action potential threshold

• Activating the sodium-potassium pump

• Inhibiting the release of neurotransmitters

• Triggering the release of neurotransmitters

Describe the process of neurotransmitter release and its effect on the postsynaptic neuron.

• Neurotransmitter release involves the release of glucose from the axon terminal and their binding to receptors on the postsynaptic neuron, causing changes in the postsynaptic membrane potential.

• Neurotransmitter release involves the release of hormones from the axon terminal and their binding to receptors on the postsynaptic neuron, causing changes in the postsynaptic membrane potential.

• Neurotransmitter release involves the release of neurotransmitters from the axon terminal and their binding to receptors on the postsynaptic neuron, causing changes in the postsynaptic membrane potential.

• Neurotransmitter release involves the release of enzymes from the axon terminal and their binding to receptors on the postsynaptic neuron, causing changes in the postsynaptic membrane potential.

Name two excitatory neurotransmitters and two inhibitory neurotransmitters.

• Excitatory: Serotonin, Dopamine; Inhibitory: Norepinephrine, Endorphins

• Excitatory: Acetylcholine, GABA; Inhibitory: Glutamate, Glycine

• Excitatory: Histamine, Epinephrine; Inhibitory: Serotonin, Dopamine

• Excitatory: Glutamate, Acetylcholine; Inhibitory: GABA, Glycine

How does myelination affect the speed of nerve impulse conduction?

• Myelination has no effect on the speed of nerve impulse conduction

• Myelination slows down the conduction of nerve impulses

• Myelination causes the nerve impulses to travel in the wrong direction

• Myelination insulates the nerve fibers, allowing for faster conduction of nerve impulses.

Explain the role of oligodendrocytes and Schwann cells in myelination.

• Oligodendrocytes myelinate nerve cells in the central nervous system, while Schwann cells myelinate nerve cells in the peripheral nervous system.

• Oligodendrocytes myelinate nerve cells in the peripheral nervous system

• Oligodendrocytes and Schwann cells have no role in myelination

• Schwann cells myelinate nerve cells in the central nervous system

What is the significance of saltatory conduction in myelinated neurons?

• Faster transmission of nerve impulses

• Slower transmission of nerve impulses

• Increased risk of nerve damage

• No effect on the transmission of nerve impulses