16 Questions
What is the result of more leak channels for K+ than for Na+ in the cell?
The inside of the cell becomes more negative
What is the purpose of graded potentials?
To transmit signals over short distances
What is the threshold potential for an action potential to start?
-55 mV
What is the function of dopamine in the brain?
Reward-motivated behavior
What is the primary function of neurons?
To communicate information through electrical signals
What is the result of an action potential not reaching the threshold potential?
The action potential stops
What is the term for the difference in positive and negative charges across the cell membrane?
Membrane potential
What is the purpose of synaptic transmission?
To transmit signals between neurons
What happens when addictive drugs are consumed?
Dopamine release is increased
Which ions are responsible for generating the resting membrane potential?
Sodium and potassium
What is the role of leak channels in the resting membrane potential?
They are involved in the movement of Na+ and K+
What is necessary for charged particles to pass through the cell membrane?
Channel proteins
What is the purpose of the sodium-potassium pump?
To maintain the resting membrane potential
Which type of transport allows substances to diffuse through the cell membrane unaided?
Simple diffusion
What is the direction of ion movement through the sodium-potassium pump?
Sodium ions out of the cell, potassium ions into the cell
What is the term for the movement of electrical charge?
Current
Learn about the role of neurons in communicating sensations, producing movements, and inducing thought processes in the brain. Understand how neurons generate electrical signals called action potentials and how membrane potentials work.
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