1. The three main patterns of hormone secretion are humoral,hormonal, and neural. These hormone secretions are responsible for managingdifferent hormones. Below is a description of each stimulus.
· The humoral stimuli are responsible for managing the changes ofthe blood levels with non-hormone chemicals. For example, if the body wasexperiencing high levels of glucose, the humoral stimuli would trigger ahormone release from the pancreas known as insulin. Insulin’s job would be tobring the blood glucose levels back down. · The main function of hormonal stimuli is to release hormoneswhenever stimulated by other hormones from the endocrine system, such as thehypothalamus.
For example, the hypothalamus and the pituitary gland are knownas the command center of the endocrine system. The hypothalamus actuallyproduces the hormones that stimulate other hormones belonging to the anteriorside of the pituitary gland. · The neural stimuli respond to nerve stimulation and will releasehormones when stimulated. For example, the flight-in-fight response.
If thebody senses danger the neural stimuli will trigger hormone release of hormonesnorepinephrine and epinephrine from the adrenal glands. 2. As mentioned above, thehypothalamus and the pituitary gland are known as the command center of theendocrine system.
The hypothalamus is responsible for releasing hormones thatstimulate other hormones in the anterior pituitary gland. The hypothalamus andthe pituitary The relationship, as explained above, between the hypothalamusand pituitary gland are able to communicate through releasing and inhibitinghormones that travel through the hypophyseal portal system. This serves as abridge between the hypothalamus and the pituitary gland. 3.
The Hydrophilic hormones are mostly amino acid-based peptides andproteins. They are soluble in water but not in lipids. They are unable to crossthe cell membrane and require a transduction system to send signals across thecell membrane. Hydrophobic hormones are made up of mostly steroids andtherefore are soluble in lipids, but not in water. They can also cross the cellmembrane unlike hydrophilic hormones.
4. Insulin and glucagon are hormones that are secreted from by the pancreasand are in charge of regulating glucose levels in the blood. When glucoselevels are too high the pancreas releases insulin. Insulin then increases theliver’s storage of glycogen which brings blood sugar levels back down.
However,if glucose levels are too low, the pancreas releases glucagon which breaks downglycogen in order to raise blood sugar levels back up. 5. Here are the following descriptions of the hormones thyroid,parathyroid, adrenal glands, pineal gland and the thymus gland. o The thyroid is located in theneck, in front of the trachea, where it wraps around it. One hormone that thethyroid releases are calcitonin. Calcitonin is released whenever there is arise in blood calcium levels. By releasing calcitonin, the hormone is able toreduce the blood calcium levels.
One way of doing this is by increasing calciumloss through the urine. o The Parathyroid is located inthe thyroid gland towards the back. Most people have four parathyroid glands.Two on each side. The parathyroid releases the parathyroid hormone alsoreferred to as PTH. PTH is responsible for regulating calcium levels.o The Adrenal glands arelocated on top of the kidneys.
There are two glands total. One on each kidney.They are responsible for regulating sodium and potassium ions through theurine, sweat and, saliva.
o The Pineal gland is locatedinside the bran, just behind the third cerebral ventricle, not too far from thethalamus. Not much is known about the pineal gland, except that it produces themelatonin hormone which helps regulate sleep.o The Thymus gland is locatedin the upper anterior part of the chest, between the lungs. Not much is knownabout the thymus gland, but what is known is that it plays a role in the immunesystem. The thymus gland produces the hormone thymosin, which helps contributeto the disease- fighting T lymphocyte cells.