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Do each of our eyes have an optic nerve?
Yes, each eye has an optic nerve that connects to the brain and carries visual information.
What is the name of the nerve that carries messages from the ear to the brain?
The cochlea structure consists of three adjacent tubes separated from each other by sensitive membranes.These tubes are coiled in the shape of a snail shell and filled with fluid. Its' job is to take the physical vibrations caused by the sound wave and translate them into electrical information the brain can recognize as distinct sound.
Part one Trace the nerve impulse listing the steps in as much detail as possible from which your brain sends the message to the appropriate muscles to step up one step Include the steps involved?
Each nerve impulse begins in the dendrites of a neuron's. the impulse move rapidly toward the neuron's cell body and then down the axon until it reaches the axon tip.a nerve impulse travels along the neuron in the form of electrical and chemical signals.Brain send the message via nerve impulses involving neurons which use the neuro-transmitter Acetylcholine
What is the definition of optic nerve?
Each of the second pair of cranial nerves, transmitting impulses to the brain from the retina at the back of the eye.
What transmits pulses from the eye to the brain?
The optic nerve carries the signals from the eyes to the brain. The eye can be considered as part of the brain; an outgrowth of it; and much of the surface of the brain, normally covered by bone, is photo receptive. Some of the signal from each eye goes to both sides of the brain.
Describe the pathway an impulse travels macroscopically through the nervous system from the brain to the muscle?
The NeuronThe cells that carry information through your nervous system are called neurons, or nerve cells. The message that a neuron carries is called a nerve impulse. The Structure of a Neuron:The structure of the neuron enables it to carry nerve impulses. A neuron has a large cell body that contains the nucleus, threadlike extensions called dendrites, and an axon. The dendrites carry impulses toward the neuron's cell body. The axon carries impulses away from the cell body. Nerve impulses begin in a dendrite, move toward the cell body, and then move down the axon. A neuron can have many dendrites, but it has only one axon. An axon, however, can have more than one tip, so the impulse can go to more than one other cell. Axons and dendrites are sometimes called nerve fibers. Nerve fibers are often arranged in parallel bundles covered with a connective tissue, something like a package of uncooked spaghetti wrapped in cellophane. A bundle of nerve fibers is called a nerve.Kinds of Neurons:Three kinds of neurons are found in the body-- sensory neurons, interneurons, and motor neurons.A sensory neuron picks up stimuli from the internal or external environment and converts each stimulus into a nerve impulse. The impulse travels along the sensory neuron until it reaches the interneuron, usually in the brain or spinal cord. An interneuron is a neuron that carries nerve impulses from one neuron to another. Some interneurons pass impulses from sensory neurons to motor neurons. A motor neuron sends an impulse to a muscle or gland, and the muscle or gland reacts in response.How a Nerve Impulse TravelsThe Synapse:What happens when a nerve impulse reaches the axon tip at the end of a neuron? At that point, the impulse can pass to the next structure. Sometimes the structure is a dendrite of another neuron. Other times, the structure is a muscle or a cell in another organ, such as a sweat gland. The junction where one neuron can transfer an impulse to another structure is called a synapse. (SIN aps). How an Impulse is Transferred:For a nerve impulse to be carried along at a synapse, it must cross the gap between the axon and the next structure. The axon tips release chemicals that carry the impulse across the gap.You can think of the gap at a synapse as a river, and an axon as a road that leads up to the riverbank. The nerve impulse is like a car traveling on the road. To get to the other side, the car has to cross the river. The car gets on a ferry boat, which carries it across the river. The chemicals that the axon tips release are like the ferry, carrying the nerve impulse across the gap.
What carries sensory information from the eye to the brain?
optic....................
What steps involved in transmitting the impulse from one neuron to another and then to the muscle fiber?
Brain send the message via nerve impulses involving neurons which use the neuro-transmitter AcetylcholineEach nerve impulse begins in the dendrites of a neuron's. the impulse move rapidly toward the neuron's cell body and then down the axon until it reaches the axon tip.a nerve impulse travels along the neuron in the form of electrical and chemical signals.Acetylcholine- a neurotransmitter released at the neuromuscular junction triggers a muscle action potential, which leads to muscle contraction
What nerve relates sensation to the brain which interprets the stimulus?
The nerve responsible for relaying sensory information to the brain is the cranial nerve. Each cranial nerve is associated with a specific type of sensory input, such as vision (optic nerve) or taste (glossopharyngeal nerve).
What must be present for a nerve impulse to begin?
each nerve impulse begins in the dendrites of a neuron's. the impulse move rapidly toward the neuron's cell body and then down the axon until it reaches the axon tip.a nerve impulse travels along the neuron in the form of electrical and chemical signals.Brain send the message via nerve impulses involving neurons which use the neuro-transmitter AcetylcholineAcetylcholine- a neurotransmitter released at the neuromuscular junction triggers a muscle action potential, which leads to muscle contraction.
What transmits impulses to the brain?
Nerves....When the sensation ( external - came from outside the body; internal - came from inside the body ) is accepted by the receptors, the impulse is being made. That impulse travels through the nerve to the brain.Example: specialized cells - receptors in the human skin for the cold sensations are irritated by the cold weather. Those receptors change the polarity of their cell membrane which causes the activation potential ( electrical impulse ) which is then transferred through the nerve fiber ( ascending nerves ) to the brain.
How do nerve cells communicate with each other to transmit signals within the body?
Nerve cells communicate with each other through electrical and chemical signals. When a nerve cell is stimulated, it sends an electrical impulse down its length. At the end of the cell, neurotransmitters are released into the synapse, a small gap between nerve cells. These neurotransmitters bind to receptors on the neighboring cell, triggering a new electrical impulse and continuing the signal transmission.
