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Hormones

Hormones are biochemicals produced by the glands in a body. Hormones help to regulate the body's functions. They control hunger, mood, sleep, growth, and a number of other functions.

2,196 Questions

What are the four mechanisms in the regulation of aldosterone secretion?

1. RENIN-ANGIOTENSIN MECHANISM, 2 PLASMA CONCENTRATION OF SODIUM AND POTASSIUM IONS 3. CONTROL EXERTED BY acth AND 4 PLASMA CONCENTRATION OF ANP

What hormone enters the bloodstream when excited?

Adrenaline. It slows blood flow to the digestive system, and speeds blood flow to "fight or flight" organs. Your muscles tingle, your eyes dilate, and you sweat. Adrenaline is why roller coasters and haunted houses feel good.

Is there any connection between adrenaline and nervousness?

Adrenaline is a "fight or flight" hormone associated with the sympathetic nervous system in the human body. This means that if you need to do alot of physical exertion or think fast, the body diverts resources to the relevant areas. This is usually an automatic survival response when the brain reckons it's entering a situation of danger, so is preparing itself; e.g. pumps more blood around to oxygenate muscles, liberate more energy from stores, puts muscles on edge for quick use, etc. A situation of nervousness is interpreted by the body as danger, so the above system is activated, releasing adrenaline, giving the characteristic fast heart, twitchy muscles, and an inability to relax. In today's modern society, it's an evolutionary survival mechanism which was important in more dangerous times gone by, but can be useful sometimes, like when you do encounter a genuinely dangerous situation.

What is an adrenaline rush?

An adrenaline rush is a surge of strength and energy brought about by a dangerous situation, as if by adrenaline.

Can high hcg levels and pergesterone levels mean multiples my hcg was 3391 and progesterone 571 at 5wks and 4 days?

High HCG levels can indicate multiples, but cannot guarantee them. Your levels are midrange for 5 weeks, mine were 7200 at 5 weeks on the nose, which is high, but normal. Ultrasound is the only way to find out for sure. If you have a "feeling" or are experiencing intense morning sickness, it is said this can be a sign towards multiples as well.

How is oxytocin used in the treatment of a miscarriage?

Oxytocin may be used in the treatment of a miscarriage to assure that all the products of conception (POC) are expelled from the uterus.

The specificity of hormone action derives from?

arget cell receptors that are unique for each hormone.

Explain the circumstances under which adrenaline is secreted and explain its role and the effect on the body?

When in the bloodstream, it rapidly prepares the body for action in emergency situations. The hormone boosts the supply of oxygen and glucose to the brain and muscles, while suppressing other non-emergency bodily processes (digestion in particular).

It increases heart rate and stroke volume, dilates the pupils, and constricts arterioles in the skin and gastrointestinal tract while dilating arterioles in skeletal muscles. It elevates the blood sugar level by increasing catabolism of glycogen to glucose in the liver, and at the same time begins the breakdown of lipids in fat cells.

Where does the adrenaline go after it is going through the blood stream?

In the bloodsteam, adrenaline acts as a hormone and binds to a few different kinds of adrenoreceptors that are found in skeletal muscle, cardiac muscle, smooth muscle etc

Depending on the receptor, it can trigger different cascade pathways that yeild different response for "fightning or fleeing"

What is estradiol-?

C18H24O2

A natural hormone of the estrogen class secreted by the ovaries.

What hormone gives the body extra energy?

Hormones do not themselves give any energy (they are not energy containing molecules), they are messenger molecules. The hormone that prepares the body for fight or flight is "adrenalin".

What is gastrin used for?

It is secreted by stomach.It stimulaes secretion of gastric juice.

If a tumor of the glucocorticoid-secreting cells of the adrenal cortex crowds out the cells that produce aldosterone what is the likely effect on urine composition and volume?

The tumor would cause increased secretion of glucocorticoids and decreased aldosterone production, leading to increased sodium and water retention in the kidneys. This would result in increased urine volume and decreased urine concentration, leading to dilute urine with low sodium levels.

Can animals have androgen insensitivity syndrome?

Yes, it has been observed in many species like horses, dogs and cats. Those animals are born with apparent normal female genitalia, but fail to come into season as they dont have ovaries but testicles inside. It is very rare, and like in humans its an x linked disorder, so it is passed through the maternal line. However it is not called androgen insensitivity syndrom but testicular feminization or male pseudo-hermaphroditism.

When was insulin first used?

Insulin was first developed in 1920. In 1950 the pills were created to treat diabetes as well.

What hormone is referred to as the tissue hormone?

Prostaglandins are the group of hormones referred to as tissue hormones.