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Megan O'Connell
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What is a neuron? Describe the three parts of a neuron and their functions. Explain the process of how a neural message is transmitted from the end of one neuron to the beginning of another and the process by which a neuron moves from a resting state (resting potential) to firing (action potential) and then back to a resting state.
On Jul 29, 2024
A neuron is a specialized cell in the nervous system that is responsible for transmitting information through electrical and chemical signals. Neurons are the basic building blocks of the nervous system and play a crucial role in processing and transmitting information throughout the body.
The three main parts of a neuron are the dendrites, the cell body (soma), and the axon. The dendrites are the receiving end of the neuron and are responsible for receiving signals from other neurons. The cell body contains the nucleus and other organelles necessary for the neuron's function. The axon is the long, slender projection of the neuron that transmits signals to other neurons or to muscles or glands.
The process of transmitting a neural message from the end of one neuron to the beginning of another is called synaptic transmission. When an action potential reaches the end of an axon, it triggers the release of neurotransmitters into the synapse, the small gap between the end of one neuron and the dendrites of another. These neurotransmitters then bind to receptors on the receiving neuron, causing a new action potential to be generated and the signal to be transmitted.
The process by which a neuron moves from a resting state (resting potential) to firing (action potential) and then back to a resting state is known as the action potential. When a neuron is at rest, it maintains a negative charge inside the cell compared to the outside. When a stimulus is received, the cell membrane becomes permeable to sodium ions, causing an influx of positive charge and depolarization. This depolarization triggers the opening of voltage-gated sodium channels, leading to a rapid influx of sodium ions and the generation of an action potential. After the action potential has been transmitted, the cell repolarizes by closing the sodium channels and opening potassium channels, allowing potassium ions to leave the cell and restore the negative charge. This returns the neuron to its resting state, ready to transmit another signal.
The three main parts of a neuron are the dendrites, the cell body (soma), and the axon. The dendrites are the receiving end of the neuron and are responsible for receiving signals from other neurons. The cell body contains the nucleus and other organelles necessary for the neuron's function. The axon is the long, slender projection of the neuron that transmits signals to other neurons or to muscles or glands.
The process of transmitting a neural message from the end of one neuron to the beginning of another is called synaptic transmission. When an action potential reaches the end of an axon, it triggers the release of neurotransmitters into the synapse, the small gap between the end of one neuron and the dendrites of another. These neurotransmitters then bind to receptors on the receiving neuron, causing a new action potential to be generated and the signal to be transmitted.
The process by which a neuron moves from a resting state (resting potential) to firing (action potential) and then back to a resting state is known as the action potential. When a neuron is at rest, it maintains a negative charge inside the cell compared to the outside. When a stimulus is received, the cell membrane becomes permeable to sodium ions, causing an influx of positive charge and depolarization. This depolarization triggers the opening of voltage-gated sodium channels, leading to a rapid influx of sodium ions and the generation of an action potential. After the action potential has been transmitted, the cell repolarizes by closing the sodium channels and opening potassium channels, allowing potassium ions to leave the cell and restore the negative charge. This returns the neuron to its resting state, ready to transmit another signal.
MO
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Age-related degenerative changes in the ear are a major cause of ______.
A) glaucoma
B) presbycusis
C) ear infections
D) radial swelling
A) glaucoma
B) presbycusis
C) ear infections
D) radial swelling
On Jul 26, 2024
B
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According to Rogers, which of the following people is MOST likely to become a fully functioning person?
A) someone with a strongly developed superego
B) someone with an extraverted personality
C) someone brought up with conditional positive regard
D) someone brought up with unconditional positive regard
A) someone with a strongly developed superego
B) someone with an extraverted personality
C) someone brought up with conditional positive regard
D) someone brought up with unconditional positive regard
On Jun 29, 2024
D
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Which of the following provides the strongest evidence of environment's role in intelligence?
A) Adopted children's intelligence scores are more like their adoptive parents' scores than their biological parents'.
B) Children's intelligence scores are more strongly related to their mothers' scores than to their fathers'.
C) Children moved from a deprived environment into an intellectually enriched one show gains in intellectual development.
D) The intelligence scores of identical twins raised separately are no more alike than those of siblings.
A) Adopted children's intelligence scores are more like their adoptive parents' scores than their biological parents'.
B) Children's intelligence scores are more strongly related to their mothers' scores than to their fathers'.
C) Children moved from a deprived environment into an intellectually enriched one show gains in intellectual development.
D) The intelligence scores of identical twins raised separately are no more alike than those of siblings.
On Jun 26, 2024
C
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Parents who emphasize behavioral control and obedience over warmth engage in which type of parenting style?
A) uninvolved
B) authoritarian
C) authoritative
D) permissive
A) uninvolved
B) authoritarian
C) authoritative
D) permissive
On May 30, 2024
B
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Rita has just finished a large meal at her favourite restaurant.Although she is quite full,when the waiter brings the dessert tray,she orders a piece of cheesecake.Which theory does NOT explain Rita's behaviour
A) pull theories
B) drive theory
C) expectancy-value theory
D) incentive theories
A) pull theories
B) drive theory
C) expectancy-value theory
D) incentive theories
On May 27, 2024
B
MO
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People from 136 countries reported an increase in ________ after spending money on others rather than on themselves.
A) self-control
B) religious faith
C) happiness
D) resilience
A) self-control
B) religious faith
C) happiness
D) resilience
On Apr 30, 2024
C
MO
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Describe the person-situation debate.
On Apr 27, 2024
The person-situation debate is a disagreement between researchers who hold the view that stable personality traits predict a person's behavior and other researchers who hold the view that personality does not actually exist and that the situation is much more important in determining a person's behavior.