Chapter 29 The Nervous system

The Central Nervous system is made up of the brain, spinal cord, and nerves. The purpose of the Central Nervous system is to send electrical impulses which assists our body with movement.

The peripheral nervous system is all of the nerves in the body that aren't part of the Central Nervous system. The function of the peripheral nervous system is to connect the CNS to the rest of the body. An example would be if you touched something hot. The PNS would detect it and send impulses up the CNS eventually reaching the brain which moves your hand away.

The Somatic Nervous system is part of the Peripheral nervous system. This regulates voluntary movements and actions. An example of this would be raising your hand in class. You don't do it automatically and you have to think about doing it so it is a voluntary movement.

The Autonomic Nervous System is also part of the Perioheral Nervous System. This is responsible for our involuntary actions such as our organs working and breathing. You don't have to think about your stomach digesting food it just does it automatically so it is involuntary.

The parasympathetic nervous system is a part of the autonomic nervosu system. This is also known as the resting system. This system slows down the heart rate and conserves energy.

The sympathetic nervous system is also a part of the autonomous nervous system. This part of the nervous system is in charge of the fight or flight response. When this is activated adrenalin increases heavily and the heart rate in the body increases.

A sensory neuron is responsible for creating electrical impulses for the nervosu system. This converts everything we touch and feel and sends it to the brain to be registered. An example of this is pain. When we are hurt sensory nerurons transmit signals to the brain registering our pain.

An interneuron is a type of neuron that is responsible for transmitting impulses between neurons.

Neuron which is responsible for moving electrical impulses through the nervous system.

A neruromuscualr junction is the poin at which a neuron meets a muscle. The electrical impulses carried by the neurons willl cause the muscle to contract and move therefore allowing movement of the body.

Acetylcholine is a type of drug that is used in the nervous system. The body real eases this chemical naturally and this allows impulses to transfer between neurons.

Norepinephrine is a drug that is similair to adrenaline. This causes blood vessels to narrow which allows blood pressure to increase rapidly along with glucose levels in the body. This is a very useful thing for dealing with conditions that cause dangerously low blood pressure.

Epinephrine plays an important role in the flight or fight response. It causes blood flow to increase along with heart rate in the body. This makes it a very valuable resource for treating anaphylaxis and cardiac arrest. This is common found in Epipens.

Synapse is the gap between one neuron and another. Electricl impulses passs across this.

Whiter matter is tissue deep within the brain that connects tissues of grey matter to one another.

Grey matter is tissue located inside the brain in which cell bodies, dendrites, and axons are located. Synapses also occcure here as well.

The cerebral cortex is the outer layer of the brain. This plays a huge role in our lifestyles because it controls our voluntary movements.

The brain is further divided into different lobes the frontal lobe, temporal lobe, the parietal lobe, the occipital lobe, the limbic lobe, and the insinular cortex.

The frontal lobe is associated with short term memory, attention, planning, and motivation.

The temporal lobe is associated with visual memories and language comprehension.

The parietal lobe is associated with language processing.

The occipital lobe is associated with color recognition and motion processing.

The limbic lobe contains parts of every lobe in the cerebral cortex. The limbic lobe is associated with learning motivation, memory, and emotions.

The insinular cortex is the deepest most central part of the brain. Unitil recently many neuroscientists knew barely anything about it. Now scientists are able to associate it with pain receptors, basic emotions, addiction, awareness, motor control, sense of oneself, and social clues.

The limbic system is a system in the brain that is associated with emotion, behavior, motivation, and long term memory.


Created with images by MikeBlogs - "neurons"

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