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.
OPTIONS:
A. "The pain lasted about 45 minutes."
B. "The pain resolved after I ate a sandwich."
C. "The pain got worse when I took a deep breath."
D. "The pain occurred while I was mowing the lawn."
Answer:
D. "The pain occurred while I was mowing the lawn."
Explanation:
Angina Pectoris, which can also be referred to as stable angina, is a temporary chest pain that doesn’t last up to 20 minutes. This pain is triggered when one engages in stressful physical activity or is emotionally stressed, causing reduced blood flow to the heart, which results in insufficient supply of oxygen to the myocardium.
The client stating that the pain occurred while mowing the lawn, strongly suggests angina pectoris,which is triggered by physical activity, as a result of the heart muscles not getting enough oxygen.
<span>The phytonutrients in apples can help you regulate your blood sugar. Recent research has shown that apple polyphenols can help prevent spikes in blood sugar through a variety of mechanisms. Flavonoids like quercetin found in apples can inhibit enzymes like alpha-amylase and alpha-glucosidase. Since these enzymes are involved in the breakdown of complex carbohydrates into simple sugars, your blood sugar has fewer simple sugars to deal with when these enzymes are inhibited. In addition, the polyphenols in apple have been shown to lessen absorption of glucose from the digestive tract; to stimulate the beta cells of the pancreas to secrete insulin; and to increase uptake of glucose from the blood via stimulation of insulin receptors. All of these mechanisms triggered by apple polyphenols can make it easier for you to regulate your blood sugar.
hope it helped and dont forget to mark as the brainliest!</span>
Answer:
While acute stress is known as short-term stress, chronic stress is defined as “long-term” stress. This is stress that stems from working in a toxic environment every day or fighting with your spouse constantly. This is the type of stress that seems never-ending and can negatively impact your health.
You should get most of your calories from the grain factor because it's <span>the body's most efficient source of fuel. They are naturally low in fat and many are high in fiber, especially if made from whole grains.</span>
