Podcast
Questions and Answers
What role do neurotransmitters play in chemically gated channels?
What role do neurotransmitters play in chemically gated channels?
- They open the channels when they attach to receptors. (correct)
- They close the channels to prevent ion flow.
- They are the ions that flow through the channels.
- They are permanently bound to the channels.
What is the primary reason potassium ions move outside the cell?
What is the primary reason potassium ions move outside the cell?
- There is a higher concentration of potassium inside the cell. (correct)
- Potassium is repelled by negative charges inside the cell.
- Potassium ions are attracted to positive charges outside the cell.
- Potassium channels are permanently open, allowing continuous flow.
Which type of channel is responsive to changes in membrane potential?
Which type of channel is responsive to changes in membrane potential?
- Voltage-gated channels (correct)
- Chemically gated channels
- Leaky channels
- Permanently open channels
What happens to the inside of the cell when potassium ions exit?
What happens to the inside of the cell when potassium ions exit?
What is the effect of negative ions inside the cell on potassium ions?
What is the effect of negative ions inside the cell on potassium ions?
What characterizes resting membrane potential?
What characterizes resting membrane potential?
What function does the central branch of a pseudo-unipolar neuron serve?
What function does the central branch of a pseudo-unipolar neuron serve?
What is the primary function of leaky channels?
What is the primary function of leaky channels?
What type of neuron is characterized by having one dendrite and one axon?
What type of neuron is characterized by having one dendrite and one axon?
In what situation are voltage-gated channels opened?
In what situation are voltage-gated channels opened?
Which statement about glial cells is correct?
Which statement about glial cells is correct?
What is the primary characteristic of multipolar neurons?
What is the primary characteristic of multipolar neurons?
Which type of neuron primarily functions in sensory information transmission?
Which type of neuron primarily functions in sensory information transmission?
How are glial cells commonly referred to in the nervous system?
How are glial cells commonly referred to in the nervous system?
What does the peripheral branch of a pseudo-unipolar neuron do?
What does the peripheral branch of a pseudo-unipolar neuron do?
Which of the following is NOT a type of neuron mentioned?
Which of the following is NOT a type of neuron mentioned?
What condition is characterized by the immune system attacking myelin sheaths in the peripheral nervous system?
What condition is characterized by the immune system attacking myelin sheaths in the peripheral nervous system?
What is the primary role of Schwann cells in the peripheral nervous system?
What is the primary role of Schwann cells in the peripheral nervous system?
Which statement about unmyelinated and myelinated axons is true?
Which statement about unmyelinated and myelinated axons is true?
What impact does multiple sclerosis have on muscle function?
What impact does multiple sclerosis have on muscle function?
What are the components responsible for generating resting membrane potential?
What are the components responsible for generating resting membrane potential?
What does 'polarized' mean in the context of neuronal function?
What does 'polarized' mean in the context of neuronal function?
Which factor does NOT contribute to the resting membrane potential?
Which factor does NOT contribute to the resting membrane potential?
What symptom is NOT typically associated with multiple sclerosis?
What symptom is NOT typically associated with multiple sclerosis?
What type of neuron is characterized by having many dendrites and one axon?
What type of neuron is characterized by having many dendrites and one axon?
Which type of glial cell is characterized by being highly branched?
Which type of glial cell is characterized by being highly branched?
What primarily distinguishes gray matter from white matter in the nervous system?
What primarily distinguishes gray matter from white matter in the nervous system?
What term is used to describe clusters of cell bodies located in the peripheral nervous system?
What term is used to describe clusters of cell bodies located in the peripheral nervous system?
What is the distinguishing feature of white matter?
What is the distinguishing feature of white matter?
What basic type of ion channel allows for passive movement of ions and is always open?
What basic type of ion channel allows for passive movement of ions and is always open?
What causes the inside of a neuron to be more negatively charged compared to the outside?
What causes the inside of a neuron to be more negatively charged compared to the outside?
What is the primary function of oligodendrocytes in the central nervous system?
What is the primary function of oligodendrocytes in the central nervous system?
What happens to reflexes below the level of spinal cord injury?
What happens to reflexes below the level of spinal cord injury?
Which spinal nerve does not have sensory distribution to the skin?
Which spinal nerve does not have sensory distribution to the skin?
What does the cervical plexus primarily innervate?
What does the cervical plexus primarily innervate?
What do spinal plexuses allow for in terms of neuron relationships?
What do spinal plexuses allow for in terms of neuron relationships?
What is the clinical significance of the phrenic nerve?
What is the clinical significance of the phrenic nerve?
What area does the brachial plexus supply nerves to?
What area does the brachial plexus supply nerves to?
What is the consequence of spinal cord inflammation after trauma?
What is the consequence of spinal cord inflammation after trauma?
How do dermatomes function in relation to the skin?
How do dermatomes function in relation to the skin?
