0
Add your answer:
Earn +20 pts
Would destruction of astrocytes decrease the rate at which action potentials are transmitted?
Yes, destruction of astrocytes could potentially decrease the rate at which action potentials are transmitted, as astrocytes play a key role in regulating the extracellular environment around neurons. Without astrocyte support, neurotransmitter levels and ion concentrations may become imbalanced, leading to disruptions in neuronal signaling and potentially reducing the efficiency of action potential transmission.
Which of these axons will conduct an action potential most quickly?
type a
Dendrites conduct both graded and action potential?
Dendrites primarily conduct graded potentials, which are local changes in membrane potential. These graded potentials can accumulate and trigger an action potential in the axon hillock if they reach a certain threshold. Action potentials are then conducted along the axon.
Which type of axon will velocity of action potential conduction be the fastest?
Myelinated axons with a larger diameter will conduct action potentials the fastest due to saltatory conduction, where the action potential jumps from one node of Ranvier to the next, skipping the myelin-covered regions. Smaller-diameter and unmyelinated axons will conduct action potentials more slowly.
What part of the neuron can conduct an action potential?
The axon of a neuron is responsible for conducting an action potential. This is made possible by the presence of voltage-gated ion channels along the axon membrane that allow for the propagation of electrical signals.
What physiological properties are exhibited by the nerve?
Nerves can conduct electrical impulses, known as action potentials, to transmit signals. They have a resting membrane potential, which is maintained through ion channels. Nerves also exhibit excitability, meaning they can respond to stimuli.
What are found in the CNS and act as the glue that binds axons and blood vessels to each other?
Astrocytes (glial cells hence the glue)
What type of neuroglia is found in the brain and spinal cord?
Astrocytes - protect and provide nutrition to the neuronsMicroglia - dispose of debrisEpedymal cells - line the central cavites of the brain and circulate cerebral spinal fluidOligodendrocytes - send out extensions to wrap around axons to insulate them for action potential propagation
What was the effect of curare on eliciting an action potential?
It creates an action potential
Will a hyperpolarization graded potential lead to an action potential?
No, hyperpolarization graded potentials do not lead to action potentials. Hyperpolarization makes the membrane potential more negative, which inhibits the generation of an action potential by increasing the distance from the threshold potential needed to trigger an action potential.
Do action potential transmission is faster in myelinated neurons?
TRUE. Neurons with myelin (or myelinated neurons) conduct impulses much faster than those without myelin.
The most abundant neuroglia in the CNS?
The most abundant neuroglia in the central nervous system is the astrocyte. Astrocytes provide structural support to neurons, help regulate the extracellular environment, and play a role in the blood-brain barrier function. They also contribute to the repair and scarring processes in the brain and spinal cord after injury.
