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.
What Is a Sprain?
A sprain is caused by stretching or tearing a ligament, or the connective tissue between bones. Ligaments help support your 360 joints, enabling you to move your elbows, knees, hips, and other parts of the body.
Sprains can be mild, moderate, or severe, but symptoms of all three types of sprains commonly include:
Bruising
Inflammation
Pain
Swelling
Sprains can be caused by direct or indirect trauma to a joint, such as a fall or a hit. You will typically feel a pop or tear in the joint when a sprain occurs. A severe sprain can immediately cause extreme pain because the ligament tears completely, making the joint nonfunctional. Moderate sprains are partial ligament tears that create unstable joints. A mild sprain stretches the ligament, which does not loosen the joint.
What Is a Strain?
Strains are injuries of your muscles or your tendons, which connect muscles to bone. Typically caused by overuse of muscles and tendons, symptoms of strains can include:
Cramping
Inflammation
Muscle spasm
Muscle weakness
Pain
Swelling
Severe strains can cause your muscle and/or tendon to be partially or completely torn, leading to debilitation. Moderate strains can partially affect muscle function since the muscle or tendon is likely only slightly torn. If you have a mild strain, your muscle or tendon is slightly stretched, not torn.
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Answer:the build up of thick, sticky mucus that can damage many of the body's organs.
Explanation:
Cystic fibrosis is an inherited disease characterized by the buildup of thick, sticky mucus that can damage many of the body's organs. The disorder's most common signs and symptoms include progressive damage to the respiratory system and chronic digestive system problems.
<span>the type 2 diabetes would be considered an : autoimune disease
autoimune disease are the type of diseaase that caused our cells to attack our own body. In order to deal with thism the scientist created some treatments that strengthen our immune system rather than controlling the amount of bloodsugar</span>
