Axons are long nerve processes which carry nerve impulses from the Soma to other neurons, they vary in length but can become almost as long as half of the human body.
The soma (body) of the neuron contains the nucleus which acts as the cell's control centre, these contain many small neurofibrils which project from the nucleus into the dendrites.
Dendrites are short, thick processes which branch out of the soma in a tree like manor. They conduct nerve impulses to the soma.
The three categories of neurons:
Afferent (Sensory) Neurons have the dendrites connected to receptors such as the eyes, ears etc. These receptors change the information they receive into electrical impulses that are transmitted to other neurons. In sensory neurons the axons are connected to other neurons.
Efferent (Motor) Neurons have the dendrites connected to other neurons, the axons are connected to effectors. Effectors are either glands or a muscle cell that is the receiving end of the nerve impulse. The nerve, when excited will cause the effector to react (move, contract, or secrete etc).
Internuncial Neurons have both the dendrites and the axons are connected to other neurons. They are sometimes referred to as connector neurons.
Internuncial neurons are found throughout the body, but especially in the spinal cord and brain.
Properties and characteristics of Neurons:
Normally the electrical impulses (messages) travel through a neuron in only one direction.
The axon may be surrounded by a 'coat' of lipids (fats) and proteins known as the myelin sheath which acts as an insulator.
Neurons are specialist cells that have lost the ability to reproduce themselves. Once the soma of a neuron has died the entire neuron dies, and can never be replaced.
Repair of damaged neurons only occurs in myelinated neurons.
white matter are coloured by myelin, consisting of many neurons supported by neuroglia.
grey matter is soma and dendrites or bundles of unmyelinated axons and neuralgia.
Answer:
A. Earlier Intervention
C. The Development of New Vaccines
D. Education through Social Media
Explanation:
I majored on Health
HIPPA requires "covered entities" to protect the A)Rights and security of individuals' personal health information.<span />
<span>B. you’ve lost weight before but gained it back due to lack of physical activity
This is cause by personal lack of activity
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I'm football when a team is on the defense they often go into a formation known as zone. When in this formation, each player covers a certain area. This way instead of having to cover a specific player, they have the ability to cover multiple players of the opposing team, point them out to their teammates, and better predict where/how the opposing team will move or what they plan to do. Although this isn't the most effective position for protecting from runs, it is very effective at protecting from passes. This is because when in zone formation, the defense is mostly playing the field, meaning they are almost all in the field preventing the Quarterback from making effective passing plays.
