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What is the amount of stimulation required to intiate a nerve impulse called?
Neuron has to be stimulated to the point of it's threshold in order for an action potential to be initiated and transmitted
Describe how the nerve impulse travels in the heart?
The brain can influence the heart in two ways. Sympathetic and parasympathetic stimulation. Parasympathetic stimulation of the heart is through the vagus nerve. Sympathetic stimulation of the heart is via cervical and thoracic splanchnic nerves. The heart has its own pacemaker cells, so the brain only changes the rate and contractility of the heart.
How does mechanical stimulation of the nerve cause an action potential?
Mechanical stimulation of a nerve physically opens ion channels in the cell membrane, allowing ions such as sodium and potassium to flow across the membrane. This creates a change in the electrical charge inside the nerve cell, leading to depolarization and generation of an action potential.
What is quicker a nerve impulse or a hormone?
nerve impulse
What is stimulation of a muscle by an impulse transmitted by a motor nerve?
Stimulation of a muscle by an impulse transmitted by a motor nerve refers to the process where a nerve signal triggers muscle contraction. When a motor neuron is stimulated, it releases neurotransmitters at the neuromuscular junction, leading to depolarization of the muscle cell membrane. This depolarization causes calcium ions to be released within the muscle fibers, ultimately resulting in the contraction of the muscle. This process is essential for voluntary movements and muscle coordination.
When the receptor have registered a the energy is converted to a electrochemical impulse?
Yes, when a receptor detects a stimulus, it triggers an electrochemical impulse to be sent along a nerve cell. This impulse travels to the brain where it is interpreted as a specific sensation or perception.
Which travels quicker through the body a nerve impulse or a hormons?
a nerve impulse
What is transcutaneous electrical nerve stimulation also called?
Electrical nerve stimulation
What are the sources of stimulation that start a nerve impulse?
Sources of stimulation that can start a nerve impulse include chemical signals (neurotransmitters released at synapses), physical stimuli (such as pressure or temperature changes acting on sensory receptors), and electrical signals (generated by neighboring neurons or external electrical sources). These stimulations can trigger the opening of ion channels in the neuron's membrane, leading to changes in membrane potential and initiation of an action potential.
What term refers to the period where no impulse can be generatedeven with intense stimulation?
The term that refers to the period during which no impulse can be generated, even with intense stimulation, is called the "absolute refractory period." During this phase, the neurons are completely unresponsive to further stimulation due to the inactivation of sodium channels following an action potential. This ensures that action potentials are distinct and unidirectional along the nerve fiber.
What are the different forms of energy that are transferred enabling us to hear the radio?
There is a transfer from Radio waves (electrical energy) to Mechanical energy (sound). When you listen to a radio, the electromagnetic energy of the broadcast is converted to electrical current, also electromagnetic energy, which is converted to mechanical energy by the speaker. The vibration of the speaker (mechanical energy) is converted to sound energy (pressure waves) which travel through the air to your ear and is converted first to mechanical energy in your middle ear and then to pressure in a fluid in your inner ear. That fluid pressure wave is converted to mechanical energy as it stimulates the hair cells in your inner ear and they release a nerve signal. The nerve signal is electrical energy which it converted to chemical energy between each nerve sell and then back to electrical energy to flow through the nerve cell - so the nerve signal is electro-chemical energy. And that is processed by your brain to let you hear the sound of your radio.
How does a nerve impulse follow all or nothing principle?
How does a nerve impulse follow the all-or-nothing principle???
