AHS 307 - Hormonal and Reproductive Drugs

Remember that the the contents of the intestines are considered to be OUT of the body.

During the proestrus stage, the follicles in the ovaries start to develop and mature. This maturation process is stimulated by an increase in follicle-stimulating hormone (FSH), which leads to an increase in estrogen production. Estrogen is responsible for the signs of estrus, such as swelling of the vulva and increased vaginal discharge. Therefore, the increased FSH and estrogen levels during proestrus are associated with the production of estrogen and the signs of estrus.

Liothyronine sodium is a synthetic form of T3, which is used less commonly to treat hypothyroidism. It is the correct answer because it matches the given description. Liothyronine sodium is known to have rare side effects, making it a relatively safe option for patients.

The correct answer is "All of the above" because all three medications mentioned (Dinoprost tromethamine, Fluprostenol, and Cloprostenol sodium) are prostaglandin analogues that are used to induce luteolysis and initiate a new estrus cycle in animals. They work by causing the regression of the corpus luteum, which is necessary for the initiation of a new reproductive cycle. Therefore, all three medications can be used to destroy the corpus luteum and start a new estrus cycle.

Testosterone cypionate is a form of testosterone that is commonly used to treat incontinence in male dogs. Testosterone is a hormone that helps regulate urinary function, and cypionate is a type of ester that allows for a slow release of the hormone into the body. By administering testosterone cypionate, the hormone levels in the dog's body can be increased, which can help improve bladder control and reduce incontinence.

Neutral Protamine Hagedorn/Lente is the correct answer because it is an intermediate-acting insulin. Intermediate-acting insulins have a slower onset of action and a longer duration of action compared to short-acting insulins. Neutral Protamine Hagedorn (NPH) and Lente are both examples of intermediate-acting insulins that provide a more sustained release of insulin over a longer period of time. They are commonly used to provide basal insulin coverage throughout the day and night. This is in contrast to regular crystalline insulin, glargine, and protamine zinc insulin, which have different durations of action and are not classified as intermediate-acting insulins.

Only work DOWN the phylogenetic tree. Ex. Bovine somatotropin would work in a frog, but not a human.

Methimazole is the drug of choice for treating hyperthyroidism. It works by inhibiting the production of thyroid hormones. The side effects of methimazole include vomiting, anorexia, and lethargy. Levothyroxine sodium and liothyronine sodium are used for hypothyroidism, not hyperthyroidism. Carbimazole is converted to methimazole in the body and is also used for treating hyperthyroidism, but it is not the drug of choice.

Prostaglandins are produced in the uterus. These hormone-like substances play a crucial role in various reproductive processes, including menstruation, childbirth, and regulation of the menstrual cycle. They are responsible for triggering contractions of the uterine muscles during labor and delivery, as well as promoting the shedding of the uterine lining during menstruation. Prostaglandins also play a role in the inflammatory response and can cause pain and inflammation in the uterus. Therefore, the correct answer is uterus.

Altrenogest (Regumate) is the correct answer because it is primarily used in horses to suppress estrus, synchronize estrus, and maintain pregnancy. Megasterol acetate (Ovaban) is used to suppress estrus in dogs, while Medroxyprogesterone acetate (Depo-provera) is used as a contraceptive in humans. Progesterone is a hormone that is naturally produced in the body and has various functions, including maintaining pregnancy, but it is not specifically mentioned in the question as a medication used in horses.

Medroxyprogesterone acetate (Depo-provera) is the correct answer because it is a hormone medication that is commonly used in neutered animals to treat behavioral disorders. It is a long-acting form of progesterone that can last up to 6 months, making it a convenient treatment option for behavioral issues in animals.

Adrenocortical insufficiency is primarily a lack of aldosterone. Aldosterone is a hormone produced by the adrenal glands that helps regulate blood pressure and electrolyte balance in the body. Without enough aldosterone, the body may experience imbalances in sodium and potassium levels, leading to symptoms such as low blood pressure, dehydration, and electrolyte abnormalities. Cortisone and T4 are not primarily involved in adrenocortical insufficiency, and iodide is not directly related to adrenal gland function.

Diestrus is the correct answer because during this phase, the corpus luteum (CL) is present. The CL produces high levels of progesterone, which is necessary for maintaining pregnancy. If the animal is not pregnant, the CL is destroyed by prostaglandin, leading to the end of diestrus and the start of a new estrous cycle.

Cortisol is the correct answer because it is involved in stress adaptation, elevates blood pressure and Na+ uptake, and has numerous effects on the immune system. Cortisol is a hormone produced by the adrenal glands in response to stress. It helps regulate blood pressure by increasing the reabsorption of sodium by the kidneys, which in turn increases blood volume and raises blood pressure. Cortisol also plays a role in the immune system by suppressing inflammation and immune responses.

Decreased aldosterone production would lead to low levels of sodium and high levels of potassium. Aldosterone is a hormone produced by the adrenal glands that helps regulate the balance of sodium and potassium in the body. When aldosterone production is decreased, the body retains less sodium and excretes more potassium, resulting in low levels of sodium and high levels of potassium.

Testosterone cypionate is a form of testosterone that is commonly used in hormone replacement therapy for individuals with low testosterone levels. It is also used to treat certain medical conditions such as delayed puberty and certain types of breast cancer. In this case, perianal adenomas and prostatic hypertrophy are conditions that can be caused by an imbalance of hormones, particularly testosterone. Therefore, the administration of testosterone cypionate can help alleviate these conditions by restoring hormonal balance.

Mitotane is the correct answer because it is the cheapest and oldest form of treatment for Cushing's disease. It works by killing part of the adrenal glands and must be titrated to find the appropriate dose. Trilostane, Selgiline, and Pergolide mesylate are not the correct answers as they do not fit the given description.

Carbimazole is the antithyroid drug used in Europe. It is commonly prescribed for the treatment of hyperthyroidism, a condition where the thyroid gland produces an excessive amount of thyroid hormones. Carbimazole works by inhibiting the production of thyroid hormones, thus helping to normalize their levels in the body. It is considered an effective and well-tolerated medication for managing hyperthyroidism. Levothyroxine sodium and liothyronine sodium, on the other hand, are thyroid hormones used to treat hypothyroidism, while methimazole is another antithyroid drug used mainly in the United States.

Glargine is the correct answer because it is classified as an ultralong-lasting insulin. Ultralong-lasting insulins are designed to have a slow and steady release of insulin over a prolonged period of time, providing a stable basal insulin level. Glargine is commonly used in the treatment of diabetes to help control blood sugar levels throughout the day and night.

The pituitary gland is often referred to as the "Master Gland" because it plays a crucial role in regulating the functions of other endocrine glands in the body. It produces and secretes hormones that control various bodily processes such as growth, metabolism, reproduction, and stress response. The pituitary gland is located at the base of the brain and is connected to the hypothalamus, which helps regulate its hormone production. Therefore, the pituitary gland's ability to control and coordinate the activities of other endocrine glands makes it deserving of the title "Master Gland."

This is a common cause of Cushing's disease - also called hyperadrenocorticism.

Levothyroxine sodium is the correct answer because it is a synthetic isomer of T4, which means it has the same chemical structure but a different spatial arrangement. It is the drug of choice for treating hypothyroidism in all animals and is also inexpensive. This makes it an effective and affordable option for managing the condition.

Mibolerone is the correct answer because it is a synthetic androgen that is used to prevent estrus in adult female dogs that are not intended for breeding. Testosterone cypionate is a form of testosterone that is used for hormone replacement therapy in humans, and finasteride is a medication used to treat enlarged prostate and male pattern baldness. However, neither testosterone cypionate nor finasteride are specifically used to prevent estrus in female dogs. Therefore, the correct answer is mibolerone.

The neurohypophysis, also known as the posterior pituitary gland, is not glandular because it does not produce hormones itself. Instead, it acts as a storage and release site for hormones produced by the hypothalamus. These hormones are transported through nerve fibers from the hypothalamus to the neurohypophysis, where they are stored and released into the bloodstream when needed. Therefore, the statement "The neurohypophysis is NOT glandular" is true.

Thyroxine (T4) and Tri-iodothyronine (T3) are the correct two active hormones. Iodide is trapped by the thyroide and converted to iodine...which eventually forms these hormones.

Selgiline is a medication commonly used in the treatment of Cushing's disease in older animals. It works by inhibiting the breakdown of certain chemicals in the brain, which helps to regulate hormone levels and reduce the symptoms of the disease. This medication is considered safer for older animals compared to other options like Mitotane, Trilostane, and Pergolide mesylate, which may have more potential side effects or risks associated with their use. Therefore, Selgiline is a preferred choice for treating Cushing's disease in older animals.

Estradiol cypionate is the correct answer because it is commonly used in veterinary medicine as a hormonal treatment for mismate injection. Mismate injection refers to the administration of hormones to prevent or terminate pregnancy in animals. Estradiol cypionate is a synthetic form of the hormone estradiol, which is involved in the regulation of the estrous cycle in female animals. It can be used to induce estrus in animals that have failed to ovulate or conceive, or to terminate an unwanted pregnancy. The other options listed are not typically used for mismate injection.

Pyometra in dogs is primarily caused by a lack of prostaglandin F2 alpha. Prostaglandin F2 alpha is responsible for regulating the estrous cycle in female dogs, including the elimination of the uterine lining during the diestrus phase. When there is a deficiency of this hormone, the uterine lining continues to thicken, leading to the accumulation of pus and bacteria, resulting in pyometra. Bacterial infection can also occur as a secondary cause, but the primary cause is the lack of prostaglandin F2 alpha. The CL (corpus luteum) being destroyed too early is not a primary cause of pyometra.

ACTH, or adrenocorticotropic hormone, is the hormone from the anterior pituitary gland that stimulates glucocorticoid secretion. Glucocorticoids are a type of steroid hormone that are involved in regulating metabolism, immune function, and the body's response to stress. ACTH binds to receptors on the adrenal cortex, which then triggers the release of glucocorticoids, such as cortisol. These hormones help to regulate various physiological processes in the body, including blood sugar levels, inflammation, and the immune response.

Progesterone is a hormone that is primarily produced in the ovaries and plays a crucial role in the menstrual cycle and pregnancy. It is responsible for the thickening of the uterine lining (endometrial proliferation) in preparation for implantation of a fertilized egg. Progesterone can also cause mild euphoria, weight gain, and increased appetite as it affects the central nervous system and metabolism. Therefore, the given symptoms align with the effects of progesterone, making it the correct answer.

Megasterol acetate (Ovaban) is the correct answer because it is an anabolic medication that is used to treat behavior disorders in cats. It is known to cause transient diabetes mellitus in cats, which means that it can temporarily cause diabetes in cats. This medication is commonly used to manage aggression and other behavioral issues in cats, but it should be used with caution due to its potential side effects.

Addison's disease is a condition caused by the insufficient production of adrenal hormones. Weakness is a common symptom of Addison's disease as the lack of hormones affects muscle function. V/D (vomiting and diarrhea) can occur due to electrolyte imbalances caused by the disease. PU/PD (polyuria and polydipsia) are signs of increased thirst and urination, which can be caused by hormonal imbalances. Lethargy and anorexia are also associated with Addison's disease as it affects energy levels and appetite. Palmar neuropathy and weight gain are not typically seen in Addison's disease.

Trilostane is the correct answer because it is used to treat Cushing's syndrome, a condition characterized by excessive production of cortisol in the adrenal glands. Trilostane works by inhibiting an enzyme involved in cortisol production, slowly decreasing its production. However, Trilostane does not have any effect on pituitary tumors, which may also be present in some cases of Cushing's syndrome.

Neutral Protamine Hagedorn/Lente insulin is not used frequently because of its lack of duration reliability. This type of insulin is a mixture of intermediate-acting insulin and a protein called protamine. It is typically taken twice a day to provide basal insulin coverage. However, its duration of action can vary from person to person, making it less reliable compared to other types of insulin such as Glargine or Protamine Zinc Insulin/Ultralente. Therefore, healthcare providers may prefer to prescribe other types of insulin that have more consistent and predictable effects.

Human chorionic gonadotropin (hCG) is a hormone produced during pregnancy that stimulates the production of progesterone, which is essential for maintaining the pregnancy. LH (luteinizing hormone) is also involved in the regulation of the menstrual cycle and is responsible for triggering ovulation. Both hCG and LH have similar functions in terms of reproductive processes. On the other hand, FSH (follicle-stimulating hormone) is involved in the development of ovarian follicles and the production of estrogen. Preganant mare serum gonadotropin (PMSG) is derived from the blood serum of pregnant mares and has similar functions to FSH. Therefore, the correct answer is LH, FSH.

Gonadotropins are hormones that are responsible for stimulating the release of LH (luteinizing hormone) and FSH (follicle-stimulating hormone). These hormones are essential for the regulation of the reproductive system. LH and FSH play a crucial role in the development and maturation of eggs in females and sperm production in males. Therefore, gonadotropins are the correct answer as they directly cause the release of LH and FSH, which are important for reproductive processes.

Progesterone is typically used as an estrus synchronization tool in cattle. It is commonly administered as an intravaginal insert. It helps regulate the estrous cycle and can be used to control the timing of breeding in cattle. Other options listed, such as Megasterol acetate, Medroxyprogesterone acetate, and Altrenogest, are also used in reproductive management in animals, but progesterone is the most commonly used and widely recognized option for estrus synchronization in cattle.

The correct answer includes antidiuretic hormone, oxytocin, and vasopressin. These hormones are secreted by the posterior pituitary gland. Antidiuretic hormone helps in regulating the body's water balance by reducing urine production. Oxytocin plays a role in childbirth and breastfeeding, as well as in social bonding and trust. Vasopressin helps in regulating blood pressure and water retention in the body. These hormones are important for maintaining proper bodily functions and homeostasis.

Vasopressin, ADH, and Desmopressin are all used to treat diabetes insipidus, a condition characterized by excessive thirst and urination. These medications work by increasing water reabsorption in the kidneys, reducing urine output, and helping to balance fluid levels in the body. Proinsulin and Thyrotropin are not used to treat diabetes insipidus and are unrelated to its management.

During the estrous cycle in mammals, the corpus luteum is formed during the metestrus phase. The corpus luteum is a temporary endocrine structure that develops from the ruptured ovarian follicle after ovulation. It secretes progesterone, which is responsible for preparing the uterus for possible pregnancy and maintaining the pregnancy if it occurs. Therefore, the increase in progesterone levels is associated with the formation of the corpus luteum during the metestrus phase.

The clinical signs listed in the question are all associated with diabetes mellitus. PU/PD (polyuria/polydipsia) refers to increased urination and thirst. Polyphagia is increased appetite. Weight loss is a common symptom of uncontrolled diabetes. Plantar neuropathy is nerve damage in the feet, which can occur as a complication of diabetes. Cataracts are clouding of the lens in the eye, which can be caused by diabetes. Ketoacidosis is a life-threatening condition that can occur in people with uncontrolled diabetes. Weight gain and cervical flexion are not typical signs of diabetes. Loss of appetite can occur in some cases of diabetes, but it is not a consistent symptom.

The correct answer for the treatment of Addison's disease is a combination of Desoxycorticosterone and Prednisone, along with Fludrocortisone acetate. Addison's disease is a condition where the adrenal glands do not produce enough cortisol and aldosterone. Desoxycorticosterone and Prednisone are synthetic forms of cortisol that help to replace the deficient cortisol levels. Fludrocortisone acetate is a synthetic form of aldosterone that helps to replace the deficient aldosterone levels. This combination of medications helps to manage the symptoms and maintain the balance of hormones in individuals with Addison's disease.

The hypothalamus secretes releasing and inhibiting factors. These factors regulate the secretion of hormones from the pituitary gland. The hypothalamus acts as a control center for the endocrine system, sending signals to the pituitary gland to either stimulate or inhibit hormone production. This interaction between the hypothalamus and pituitary gland is crucial for maintaining hormonal balance in the body. The adrenal glands and thyroid gland are not directly involved in secreting releasing and inhibiting factors.

Diazoxide is the correct answer because it directly inhibits pancreatic insulin secretion. Acarbose is used to treat type 2 diabetes by slowing down the digestion of carbohydrates. Glipizide and glyburide are sulfonylurea drugs that stimulate insulin release from the pancreas, rather than inhibiting it.

RBCs and neurons do not require insulin to transport glucose into them. Insulin is a hormone that helps regulate glucose levels in the body by promoting the uptake of glucose into cells. However, RBCs and neurons have glucose transporters that are not dependent on insulin for glucose uptake. RBCs rely on a facilitated diffusion process, while neurons have specialized glucose transporters that allow them to take up glucose without the need for insulin. Hepatocytes, on the other hand, require insulin for glucose uptake.

Mitotane is the correct answer because it is a medication used in the treatment of Cushing's disease in horses. Cushing's disease is a condition caused by excessive production of cortisol, and Mitotane helps to reduce cortisol levels. It works by destroying the outer layer of the adrenal glands, which are responsible for cortisol production. While Mitotane is effective in treating Cushing's disease, it can also worsen laminitis, a painful condition affecting the hooves of horses. Therefore, it is important for veterinarians to closely monitor horses receiving Mitotane treatment to prevent or manage any laminitis complications.

Megasterol acetate (Ovaban) is used to treat skin conditions, postpone estrus, and alleviate false pregnancies.

Acarbose is the correct answer because it is an alpha-glucosidase inhibitor that slows down the digestion and absorption of carbohydrates in the gastrointestinal tract. It works by inhibiting the enzymes that break down complex carbohydrates into simple sugars, thus reducing the rate and amount of glucose absorbed from the GI tract after a meal. This leads to lower blood glucose levels as less glucose is available for absorption into the bloodstream. Diazoxide, Glipizide, and Glyburide are not drugs that specifically target the rate and amount of glucose absorption from the GI tract.

Sulfonylureas are a type of oral hypoglycemic agent that helps lower blood glucose levels. Glipizide is a specific sulfonylurea medication that works by stimulating the pancreas to produce more insulin. Acarbose, on the other hand, is not a sulfonylurea but another type of oral hypoglycemic agent called an alpha-glucosidase inhibitor. Acarbose works by slowing down the digestion of carbohydrates, which helps prevent blood glucose levels from spiking after meals. Therefore, the correct answer is Sulfonylureas, Lower BG (blood glucose), Glipizide, Acarbose.

Gonadorelin, hCG, and Altrenogest are all used for estrus synchronization in cattle. Gonadorelin is a synthetic hormone that stimulates the release of luteinizing hormone (LH) from the pituitary gland, which in turn triggers ovulation. hCG (human chorionic gonadotropin) is a hormone that mimics LH and also stimulates ovulation. Altrenogest is a synthetic progestin that is used to suppress estrus and synchronize the reproductive cycle in cattle. These three substances are commonly used in reproductive management programs to control the timing of breeding and improve reproductive efficiency in cattle.