Hormones

Yes, people with Androgen Insensitivity Syndrome (AIS) typically have undescended or underdeveloped testes instead of ovaries due to their genetic makeup. AIS is a condition where individuals with XY chromosomes are partially or completely insensitive to androgens, resulting in atypical development of the reproductive organs.

Testosterone does not act on a second messenger system. Testosterone acts directly on genes within a cell to initiate cellular changes, whereas the other hormones listed (Glycogen, Epinephrine, Growth Hormone, ACTH) typically use second messenger systems to transmit their signals inside the cell.

Yes, the ovaries release estrogen and progesterone in response to gonadotropic hormones (FSH and LH) from the pituitary gland. FSH stimulates the development of follicles in the ovaries, leading to estrogen production, while LH triggers ovulation and promotes the production of progesterone from the corpus luteum.

Insulin is considered to be an antagonist of lipolysis. Insulin promotes the storage of fats by inhibiting the breakdown of fats (lipolysis) in adipose tissue.

Calcitonin decreases blood calcium levels by promoting calcium deposition in bones, inhibiting bone breakdown and reducing calcium reabsorption in the kidneys. Parathyroid hormone increases blood calcium levels by stimulating bone breakdown, increasing calcium absorption in the intestines, and promoting calcium reabsorption in the kidneys.

Yes, the parathyroid hormone is a key regulator of calcium levels in the blood. It acts to increase calcium levels by promoting its release from bones, enhancing its absorption in the intestines, and reducing its excretion from the kidneys. However, other hormones and factors also play important roles in calcium regulation.

No, the posterior pituitary gland does not synthesize oxytocin. Instead, it stores and releases oxytocin, which is produced in the hypothalamus and transported to the posterior pituitary gland for storage and eventual release in response to certain stimuli.

No, the posterior pituitary gland does not respond to gonadotropin-releasing hormone (GnRH). The posterior pituitary mainly secretes oxytocin and vasopressin, which are produced in the hypothalamus and stored in the posterior pituitary before being released into the bloodstream. GnRH primarily acts on the anterior pituitary gland to regulate the release of gonadotropins like luteinizing hormone (LH) and follicle-stimulating hormone (FSH).

The condition is called diabetes insipidus. It occurs when the body is unable to properly balance the amount of water in urine due to a lack of ADH production or response. Symptoms include excessive thirst and urination.

Hormones vary widely in their structure and make up - therefore it is not appropriate to suggest a monomer of a hormone as there are many many different types.


The simplist hormone are derivatives of the amino acids tyrosine and tryptophan such as the catecholamines (e.g. adrenaline and thyroxine) but as these do not link together into chains.

FSH and LH are gonadotrophins.They are secreted by pitutory.

The monoamine in the given options is b. epinephrine. It is a type of monoamine that acts as a neurotransmitter and hormone in the body, helping to regulate the "fight or flight" response.

It inhibits the secretions of the stomach.

regulate body functions

Yes, glucagon is synthesized in the rough endoplasmic reticulum (ER) of pancreatic alpha cells. It is then processed through the Golgi apparatus before being released into the bloodstream where it helps regulate blood sugar levels by promoting the release of glucose from the liver.

Atrial natriuretic peptide (ANP) works as a negative feedback to aldosterone. ANP is released from the atria of the heart in response to high blood volume and works to decrease sodium reabsorption in the kidneys, opposing the actions of aldosterone.

Calcitonin is a hormone that exerts antagonistic action to parathyroid hormone (PTH). Calcitonin helps regulate calcium levels in the blood by promoting calcium deposition in the bones, thus reducing blood calcium levels, whereas PTH increases blood calcium levels by promoting calcium release from bones.

No, aldosterone is not released from the pituitary gland. It is a hormone produced by the adrenal glands, specifically the adrenal cortex. Aldosterone helps regulate blood pressure and electrolyte balance in the body.

Stimuli such as low blood pressure, low blood volume, and low sodium levels in the blood can activate the renin-angiotensin system. These triggers result in the release of renin, an enzyme that starts the cascade leading to the production of angiotensin II, a powerful vasoconstrictor.

Secretin is produced in the small intestine, specifically in the duodenum. It is released in response to acidic chyme entering the duodenum from the stomach, and it helps stimulate the pancreas to release bicarbonate-rich fluids to neutralize the acidity.

Vasopressin is also called antidiuretic hormone (ADH) because it helps regulate water balance in the body by reducing urine production and increasing water reabsorption in the kidneys.

The juxtaglomerular cells located in the walls of the afferent arteriole secrete renin when they sense a drop in blood pressure. Renin is released into the bloodstream in response to decreased blood flow to the kidneys, ultimately leading to the activation of the renin-angiotensin-aldosterone system to help regulate blood pressure and fluid balance.

False. Beta cells of the pancreatic islets secrete insulin in response to high blood sugar levels, not glucagon. Glucagon is secreted by alpha cells in the pancreatic islets in response to low blood sugar levels to raise blood sugar levels.

Atrial natriuretic hormone promotes natriuresis and diuresis, which helps to reduce blood volume and blood pressure. It also inhibits the renin-angiotensin-aldosterone system, leading to vasodilation and decreased sodium reabsorption.

Most potent mineralocorticoid is fludrocortisone