Which of the following correctly describes how nerve impulses move throughout the body?
A. Electrical transmission through neurons and elecrical transmission between neurons.
B. Chemical transmission through neutrons and chemical transmission between neutons.
C. Chemical transmission through neurons and electical transmission between neutons.
D. Electrical transmission through neutons and chemical transmission between neutrons.
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check D
To determine the correct answer, let's break down the options and understand the components involved in nerve impulses.
A. Electrical transmission through neurons and electrical transmission between neurons: This option accurately describes how nerve impulses are propagated throughout the body. Nerve impulses, also known as action potentials, are electrical signals that travel along neurons. Within each neuron, these electrical signals are transmitted by changes in the electric potential across the neuronal cell membrane. When a nerve impulse reaches the end of one neuron, it triggers the release of chemical messengers called neurotransmitters, which then transmit the impulse to the next neuron.
B. Chemical transmission through neutrons and chemical transmission between neutrons: There is a typo in this option; it should say "chemical transmission through neurons." This option incorrectly states that chemical transmission occurs between neutrons (which are subatomic particles) rather than neurons (which are cells).
C. Chemical transmission through neurons and electrical transmission between neutrons: This option is incorrect, as electrical transmission typically occurs between neurons, not neutrons.
D. Electrical transmission through neutrons and chemical transmission between neutrons: Similar to option B, this option mistakenly refers to "neutrons" instead of "neurons." Furthermore, electrical transmission typically occurs along neurons, not neutrons.
Considering the above analysis, the correct answer is A. Electrical transmission through neurons and electrical transmission between neurons.
The correct answer is A. Electrical transmission through neurons and electrical transmission between neurons.
Nerve impulses, or signals, are transmitted through the body via neurons - the specialized cells of the nervous system. Within neurons, the transmission of nerve impulses is electrical in nature. This means that the impulses are carried as electrical signals along the length of the neuron, from one end to the other.
Once the electrical impulse reaches the end of a neuron, it needs to be transmitted to the next neuron or to a target cell (such as a muscle cell or gland). This transmission is accomplished through a small gap called a synapse. At the synapse, the electrical signal is converted into a chemical signal in the form of neurotransmitters. These neurotransmitters are then released into the synapse and travel across the gap to reach the next neuron or target cell.
Once the neurotransmitters reach the next neuron or target cell, they bind to specific receptors, initiating a response and allowing the electrical signal to start again.
So, nerve impulses move throughout the body through a combination of electrical transmission within neurons and electrical transmission between neurons.