16 Questions
What is the function of dendrites in neurons?
Receive signals from other neurons
What is the role of an axon in a neuron?
Transmit signals to other cells
What is a synapse?
A junction between an axon and another cell
What do neurons use to communicate long-distance signals?
Electrical signals
At most synapses, what passes information from the transmitting neuron to the receiving cell?
Chemical messengers called neurotransmitters
How does the cone snail disable neurons in its prey?
By using chemical signals
What are the three stages of information processing in nervous systems?
Sensory input, integration, and motor output
Which type of neurons transmit information about external stimuli such as light, touch, or smell?
Sensory neurons
What is the main function of interneurons in the nervous system?
Integrate and interpret information
Which cells are required to support neurons in both the central nervous system and the peripheral nervous system?
Glial cells
What is the resting potential of a neuron?
The voltage across the plasma membrane of a neuron when it is not sending signals
What maintains the concentration gradient of K+ and Na+ ions across the membrane of a neuron?
Diffusion of ions back and forth across the membrane
What type of ion channels open or close in response to a change in voltage across the plasma membrane of a neuron?
Gated ion channels
During depolarization, what happens to the inside of the neuron's membrane?
It becomes more positive
What is the role of hyperpolarization in a neuron?
To return to resting membrane potential
Which cells form bundles we call nerves when grouped together?
Axons of neurons
Test your knowledge of neuron structure and organization with this quiz on electrical signals in animals. Explore the components of neurons, including the cell body, dendrites, and axon, and their role in information transfer. Presented by Dr. Sahar Jaffal and based on Concept 48.1 from Pearson Education Ltd.
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