What is nervous system answers?
Your nervous system is your body’s command center. Originating from your brain, it controls your movements, thoughts and automatic responses to the world around you. It also controls other body systems and processes, such as digestion, breathing and sexual development (puberty).
What is the nervous system quizlet?
The nervous system is the master coordinating system of the body. Every thought, action, and sensation reflext its activity. The structures of the nervous system are described in terms of 2 principal divisions-the central nervous system (CNS) and the peripheral nervous system (PNS).
What is the covering of fatty material that speeds up the passage of nerve impulses?
Myelin sheath
A. Motor neuron; B. Sensory neuron; C. Relay neuron;
| Term | Function |
|---|---|
| C. Myelin sheath | 6. The covering of fatty material that speeds up the passage of nerve impulses. |
| L. Axon terminal | 7. The structure at the end of an axon that produces neurotransmitters to transmit the nerve impulse across the synapse. |
Which one of the following parts of the nervous system carries impulses towards the brain quizlet?
The afferent division of the peripheral nervous system carries impulses to the CNS; the efferent division carries impulses away from the CNS.
What are the main components of the nervous system?
Central Nervous System Structure. The CNS has three main components: the brain, the spinal cord, and the neurons (or nerve cells).
What does the node of Ranvier do in a nerve cell?
node of Ranvier, periodic gap in the insulating sheath (myelin) on the axon of certain neurons that serves to facilitate the rapid conduction of nerve impulses.
Which nerve carries impulses from eye to brain?
optic nerve
optic nerve, second cranial nerve, which carries sensory nerve impulses from the more than one million ganglion cells of the retina toward the visual centres in the brain.
What is the gap between neurons called?
synapse, also called neuronal junction, the site of transmission of electric nerve impulses between two nerve cells (neurons) or between a neuron and a gland or muscle cell (effector).
What are the components of the nervous system?
The long fiber that carries nerve impulses Nerve A bundle of axons Synapse The connection between adjacent neurons Neurotransmitter The chemical secreted into the gap between neurons at a synapse
What is the peripheral nervous system?
Part of the nervous system that is composed of the brain and the spinal cord. 2. Part of the nervous system that is composed of the cranial and spinal nerves. 3. The part of the peripheral nervous system that regulates
What are the components of a neuron?
The long fiber that carries nerve impulses Nerve A bundle of axons Synapse The connection between adjacent neurons Neurotransmitter The chemical secreted into the gap between neurons at a synapse Reflex A rapid automatic response to a stimulus Myelin sheath
What is the function of a nerve cell?
The nerve cell that carries impulses from a sense receptor to the brain or spinal cord Relay neuron The nerve cell that connects sensory and motor neurons Motor neuron The nerve cell that transports impulses from the brain or spinal cord to a muscle or gland