WebbThe somatic nervous system (SNS) regulates voluntary activities such as muscular movement. It also controls reflexes, such as pulling your hand away from the hot surface of a stove. The autonomic nervous system (ANS) regulates activities that are not under conscious control and has two divisions that are opposite of one another: the … Webbfunctional units of the nervous system is now universally accepted. Today, we refer to these nervous system cells as neurons, a name that comes from the Greek word for “nerve.” The idea proposed by Cajal, that neurons are the units of brain function, is called the neuron hypothesis. Figure 3-3 shows the three basic parts of a neuron.

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WebbThe sympathetic nervous system prepares the body for any possible type of emergency. When the fight or flight response takes over, the SNS is activated. During the activation when the body is under stress, the heart rate and breathing increases in response to a release of adrenaline, as well as changes to the organ’s function. WebbThe nerve system has a basic unit, structural and functional units. The brain and spinal cord are major nerve system organs and they produce nerves, nerves are connections or … do lighter cars go faster

What are the parts of the nervous system? NICHD

Webbindividual nerve cells - smallest unit in the nervous system. receive, process, and transmit info. sensory (afferent) receives sensory info and takes it to brain. motor (efferent) movement. take info away from brain and send it to parts of the body. interneuron. in … WebbThe nervous system produces a response in effector organs (such as muscles or glands) due to the sensory stimuli. The motor ( efferent) branch of the PNS carries signals away from the CNS to the effector organs. When the effector organ is a skeletal muscle, the neuron carrying the information is called a somatic motor neuron; when the effector ... WebbCerebrospinal Nervous System It consists of 12 pairs of cranial nerves which are connected to the brain having particular functions. The following are the nerves and their respective functions: Optic – Sight Oculomotor – Eyeball, pupils and lens movement Olfactory – Smell Trochlear – Motion of the eye muscles (superior oblique) do lighter molecules diffuse faster