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State the three main parts of a neuron and describe how an impulse travels through a neuron?
Okay, information is received through the dendrites, and then moves on the the cell body. From there, the cell's axon passes the message on to other neurons or to muscles or glands.
A resting motor neuron is expected to?
exhibit a resting potential that is more negative than the "threshold" potential.
What Receptor sites on the membrane of a neuron's dendrites receive?
Receptor sites on the membrane of a neuron's dendrites receive neurotransmitters, which are chemical messengers released by neighboring neurons. When these neurotransmitters bind to their specific receptors, they can initiate changes in the neuron's electrical state, leading to either excitatory or inhibitory signals. This process is essential for synaptic transmission and plays a crucial role in neural communication and processing information.
If the inside of the neuron is negatively charged compared to the outside the neuron is in the?
If it's approximately -70 mV, then it's in a resting state.
State in which the resting potential is reversed as sodium ions rush into the neuron?
This state is known as depolarization. It occurs when there is a rapid influx of sodium ions into the neuron, causing the inside of the neuron to become more positively charged compared to the outside.
What do you call the state of a neuron when it is firing a neural impulse?
Resting potential.
The state of the neuron when not firing a neural impulse is known as?
Resting potential
What name is given to a neuron that is not sending a nervous impulse?
A neuron that is not sending a nervous impulse is typically referred to as a resting neuron. In its resting state, the neuron is polarized with a negative internal charge.
State the three main parts of a neuron and describe how an impulse travels through a neuron?
Okay, information is received through the dendrites, and then moves on the the cell body. From there, the cell's axon passes the message on to other neurons or to muscles or glands.
What is the firing rate of a neuron?
The firing rate of a neuron refers to the frequency at which it generates action potentials, typically measured in spikes per second (Hz). This rate can vary significantly depending on the type of neuron and its physiological state, ranging from a few spikes per second to hundreds. Factors such as synaptic inputs, membrane potential, and the overall activity of the neuronal network can influence a neuron's firing rate. It plays a crucial role in encoding information and communicating within the nervous system.
State why there is a brief delay in the transmission of an impulse across the synapse?
The impulse must go from one neuron to the next. To do this, it must change from an electrical to a chemical signal, and back to an electrical signal when it reaches the next neuron. Electrical signals are impossibly fast, but neurotransmitters cannot cross a synapse that fast. So, the impulse is at its slowest point when it crosses the synapse.
What is an unstimulated neuron?
An unstimulated neuron is a nerve cell that is not currently transmitting signals. It is in a resting state, with a stable membrane potential, and is not actively firing action potentials or sending messages to other neurons.
A resting motor neuron is expected to?
exhibit a resting potential that is more negative than the "threshold" potential.
The state during which a neuron contains more negatively charged ions inside the cell than outside the cell and is not firing is referred to as the?
resting potential
What Receptor sites on the membrane of a neuron's dendrites receive?
Receptor sites on the membrane of a neuron's dendrites receive neurotransmitters, which are chemical messengers released by neighboring neurons. When these neurotransmitters bind to their specific receptors, they can initiate changes in the neuron's electrical state, leading to either excitatory or inhibitory signals. This process is essential for synaptic transmission and plays a crucial role in neural communication and processing information.
What does the impulse momentum theorem state?
The impulse momentum theorem states that the change in momentum of an object is equal to the impulse applied to it. Mathematically, it can be expressed as the product of force and time, resulting in a change in momentum.
What are impulses that are sent down a neuron?
These impulses are called Nerve impulse. Nerve impulse is wave of electrochemical change tha travels along the length of neuron. Electrical potentail of neuron when it is in unstimulated condition is -70 millivolts. In this state outside the membrane of neuron, concentration of positive ions is more than the inside of membrane. Inside the membrane potassium ions are more than sodium ions while outside the membrane sodium ions are more than the potassium ions present there. This balance is maintained by sodium-potassium pumps through which three sodium ions move outside and two potassium ions move inside the membrane at a time. During this activity ATPase (enzyme) breaks down the ATP into ADP and phosphate then energy is released. When a neuron is stimulated, stimulus causes its membrane to depolirized (sodium ions move inside and potassium ions move outside the membrane). The adjacent parts of membrane are also affected by this depolarization. The change travels along the neuron while the prior parts of membrane return to their original state.
