Answer:
Hormone production and release are primarily controlled by negative feedback. In negative feedback systems, a stimulus elicits the release of a substance; once the substance reaches a certain level, it sends a signal that stops further release of the substance. In this way, the concentration of hormones in blood is maintained within a narrow range. For example, the anterior pituitary signals the thyroid to release thyroid hormones. Increasing levels of these hormones in the blood then give feedback to the hypothalamus and anterior pituitary to inhibit further signaling to the thyroid gland, as illustrated in Figure 18.14. There are three mechanisms by which endocrine glands are stimulated to synthesize and release hormones: humoral stimuli, hormonal stimuli, and neural stimuli.
Explanation:
Hyperthyroidism is a condition in which the thyroid gland is overactive. Hypothyroidism is a condition in which the thyroid gland is underactive. Which of the conditions are the following two patients most likely to have?
Patient A has symptoms including weight gain, cold sensitivity, low heart rate and fatigue.
Patient B has symptoms including weight loss, profuse sweating, increased heart rate and difficulty sleeping.Humoral Stimuli
The term “humoral” is derived from the term “humor,” which refers to bodily fluids such as blood. A humoral stimulus refers to the control of hormone release in response to changes in extracellular fluids such as blood or the ion concentration in the blood. For example, a rise in blood glucose levels triggers the pancreatic release of insulin. Insulin causes blood glucose levels to drop, which signals the pancreas to stop producing insulin in a negative feedback loop.
Hormonal stimuli refers to the release of a hormone in response to another hormone. A number of endocrine glands release hormones when stimulated by hormones released by other endocrine glands. For example, the hypothalamus produces hormones that stimulate the anterior portion of the pituitary gland. The anterior pituitary in turn releases hormones that regulate hormone production by other endocrine glands. The anterior pituitary releases the thyroid-stimulating hormone, which then stimulates the thyroid gland to produce the hormones T3 and T4. As blood concentrations of T3 and T4 rise, they inhibit both the pituitary and the hypothalamus in a negative feedback loop.
Answer:
Radioactive dating of rocks
Explanation:
I think that these factors are :the type of radiation , the duration of exposure to the radiation and the amount of radiation exposure. Radiation is commonly used to treat many medical conditions. Frequently used as a therapy for various forms of cancer, it is common for radiation to cause death of cells both cancerous and healthy cells in the areas irradiated. The extent of damage caused depends on the type of radiation irradiated, the duration of exposure and the amount of radiation.
If both of those sexual partners are faithful to each other, and only have sexual relations with one another, then there isn't a high probability that either of them is going to get HIV. If they want to be sure, they should use protection, such as condoms, to prevent getting HIV through body fluids. And they should always be honest with each other in case one of them has that disease.
1.) Tsunamis typically occur by earthquakes generated in a subduction zone. Most earthquakes happen at convergent boundaries, as they are hitting against each other.
2.) These next two parts are by @HistoryGuy but it's relevant here:
"Survivors were affected economically because the tsunami destroyed lots of infrastructure that was crucial to the functioning of the economy, such as telephone poles, water works, etc. It affected them socially because it is obviously devastating to endure that kind of loss of life. It affected them environmentally because lots of raw sewage was leaked onto the streets, leading to health issues."
3.) This is from Juenna Aaons and her Prezi,
"I believe it would be different because America and most Western European cities are well off. They have funds, food, water and probably better options for citizens in general after a disaster on a scale as large as this one. I think we'd fix the damage a lot sooner, and most of the survivors would have accommodations right away."
4.) "<span>The countries effected were devastated. There was a massive amount of damage everywhere, and it was going to cost billions. I also think that the communities banded together and helped each other out, I guess it was a bit of a bonding experience as well. Foreign governments and groups also donated money and offered help to the effected nations."
5.) http://geology.com/articles/tsunami-geology.shtml
</span>https://prezi.com/avorlhb8mv-i/science-class/
@HistoryGuy
and my brain
