Hormones

Oxytocin is secreted by the posterior pituitary gland, while ADH (antidiuretic hormone) is also secreted by the posterior pituitary gland.

Receptors of protein hormones are present in plasma membrane but for steroid hormones no membrane receptors are needed as they can enter cell membrane , mobile receptors pic steroid hormones from cell membrane and carry them to nucleus .

No, parathyroid hormone is not directly involved in allowing for the attachment of tendons. Parathyroid hormone primarily regulates calcium levels in the body by acting on the bones, kidneys, and intestines. Tendons attach muscles to bones and their attachment is governed by the structure and composition of the tendon itself.

Adrenaline is not involved in active or passive transport. It is a hormone released by the adrenal glands in response to stress or excitement, and it acts on various organs to increase heart rate, dilate airways, and mobilize energy reserves. Transport refers to the movement of molecules across cell membranes, which is not the same as the action of adrenaline.

The amino acid order for the mRNA sequence AUG UAC GGU GGA UUU CUA corresponds to the pentapeptide Met-Tyr-Gly-Gly-Phe, which is the endorphin called leucine enkephalin.

Growth hormone has more target cells in the body than any of the others mentioned. It acts on many tissues throughout the body to stimulate growth, cell reproduction, and regeneration.

No, oxytocin is not secreted by the anterior lobe of the pituitary. It is produced in the hypothalamus and stored in the posterior pituitary gland until released into the bloodstream.

Antidiuretic hormone (ADH) regulates fluid intake by stimulating the kidneys to reabsorb water back into the bloodstream instead of excreting it in urine. This helps to maintain proper water balance in the body by increasing water retention. When the body detects dehydration or high salt concentration in the blood, ADH is released to prevent excessive fluid loss and increase thirst sensation to encourage more fluid intake.

Adrenocorticotropic hormone (ACTH) is the tropic hormone that is suppressed by increased plasma levels of cortisol. Cortisol exerts negative feedback on the hypothalamus and pituitary gland, inhibiting the release of ACTH.

The medical term is prolactinoma. It is a benign tumor of the pituitary gland that causes an overproduction of prolactin hormone, leading to various symptoms such as irregular menstrual periods, breast milk production in non-pregnant individuals, and infertility. Treatment options usually involve medication or surgery to reduce the tumor size and control hormone levels.

Yes, antidiuretic hormone (ADH) inhibits urine production by promoting water reabsorption in the kidneys. ADH works by increasing the permeability of the kidney tubules to water, allowing more water to be reabsorbed back into the bloodstream, ultimately leading to a decrease in urine output.

Testosterone is the hormone that directly stimulates growth of muscle tissue leading to increased muscle mass. It plays a key role in promoting muscle protein synthesis and increasing muscle size and strength.

Aldosterone helps the body cope with ongoing stress by increasing sodium reabsorption in the kidneys, which leads to water retention and increased blood volume. This helps to maintain blood pressure during stressful situations.

Vitamin D works with parathyroid hormone to regulate calcium levels in the tissues. Vitamin D helps increase calcium absorption in the intestines and supports the action of parathyroid hormone in maintaining calcium balance in the body.

Oxytocin primarily targets the smooth muscle of the uterus and the mammary glands. It plays a key role in inducing uterine contractions during labor and facilitating milk ejection during breastfeeding.

Secretin is a hormone, not an enzyme. It is produced by the duodenum in response to the presence of acid in the stomach, and it helps to stimulate the release of bicarbonate-rich pancreatic juices to neutralize the acid entering the small intestine.

Vasopressin is the hormone most similar to oxytocin in chemical structure. Both hormones are nonapeptides, containing nine amino acids, and differ by only two amino acids in their structure.

Insulin itself is not flammable. However, it should be stored properly away from sources of heat, flame, or direct sunlight to prevent degradation of the medication. It is important to follow proper storage guidelines to ensure the effectiveness of insulin.

Insulin is called a hormone of abundance because it is released in response to high levels of glucose in the bloodstream, which usually occurs after eating a meal. Insulin helps to move glucose from the blood into cells to be used for energy, storage, or other metabolic processes, signaling that there is an abundance of energy available for the body.

The molecular mass of adrenaline, also known as epinephrine, is approximately 183.21 g/mol.

No, leptin is not an enzyme. It is a hormone produced by fat cells that plays a role in regulating energy balance and appetite.

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.