Question 1

Which endocrine gland is associated with kidneys?

Accepted Answer

Adrenal glands are located on the top of two kidneys. They are thus also called as supra renal gland.

Question 2

The LH surge is essentially a signal sent from the brain to the ovary,which indicates

Accepted Answer

The LH surge causes the initiation of the process of ovulation. After ovulation, the follicle is transformed into the corpus luteum, which is stimulated by LH. It occurs roughly 36 hours before ovulation which indicates egg has matured and is ready for fertilisation. Hence, The LH surge is essentially a signal sent from the brain to the ovary, which indicates An egg is mature.So, the correct answer is 'An egg is mature'.

Question 3

The total islets of Langerhans in human pancreas are

Accepted Answer

Islets of Langerhans, also called islands of Langerhans are irregularly shaped patches of endocrine tissue located within the pancreas of most vertebrates. They are named for the German physician Paul Langerhans, who first described them in 1869. The normal human pancreas contains about 1,000,000 islets. The islets consist of four distinct cell types, of which three produce important hormones (alpha cells producing glucagon; beta cells producing insulin and delta cells producing somatostatin). Hormones produced in the islets of Langerhans are secreted directly into the blood flow. The fourth component PP cells secretes pancreatic polypeptide. The combined mass of the islets is 1 to 1.5 grams.

Question 4

The blood sugar level is regulated by

Accepted Answer

The antagonistic function of insulin and glucagon hormones of pancreas maintains blood glucose level. Insulin lowers the blood glucose level by stimulating the uptake of glucose by cells while glucagon stimulates the breakdown of glycogen into glucose to increase the blood sugar level. Thyroid hormones regulate the metabolic rate while anterior pituitary control hormonal secretion of other glands. Posterior pituitary releases vasopressin and oxytocin. The hypothalamus regulates pituitary gland by regulatory hormones. Thus, the correct answer is option

Question 5

The gland which regulates blood sugar levels is/are

Accepted Answer

The pancreas is a 6 inch-long flattened gland that lies deep within the abdomen, between the stomach and the spine. It is connected to the duodenum, which is part of the small intestine.The pancreas maintains the body's blood glucose (sugar) balance. Primary hormones of the pancreas include insulin and glucagon, and both regulate blood glucose. Glucagon&#10;helps insulin maintain normal blood glucose by working in the opposite way of&#10;insulin. It stimulates our cells to release glucose, and this raises our blood&#10;glucose levels. Insulin hormone&#10;regulates blood glucose by allowing many of our body&#8217;s cells to absorb and use&#10;glucose. In turn, this drops blood glucose levels. Therefore, the correct answer is option A.

Question 6

Which of the following is an emergency hormone

Accepted Answer

Adrenaline whips up metabolism to prepare the animal to face special physical or mental stress. It increases the heart rate and blood pressure, expands the air passages of the lungs, enlarges the pupil in the eye, and stimulates the breakdown of liver and muscle glycogen to provide more glucose for respiration.So, the correct answer is option D.

Question 7

The source of male sex hormones is

Accepted Answer

Leydig cells are also known as interstitial cells of the testis. They are found adjacent to the seminiferous tubules in the testicle.The Interstitial cells of the testis produce testosterone(male sex hormone) in the presence of the luteinizing hormone (LH).In male humans, testosterone plays a key role in the development of male reproductive tissues such as testes and prostate, as well as promoting secondary sexual characteristics such as increased muscle and bone mass, and the growth of body hair.Hence the source of male sex hormones is Interstitial cells of the testis.So, the correct answer is 'Interstitial cells of the testis'.

Question 8

A hormone that stimulates an endocrine gland to grow and secrete its hormone is known as

Accepted Answer

A tropic hormone is a hormone that stimulates an endocrine gland to grow and secrete its hormones. (One hormone causes another hormone to do something) In humans, tropic hormones are secreted by the adenohypophysis(anterior pituitary gland). Hence, A hormone that stimulates an endocrine gland to grow and secrete its hormone is known as Tropic hormonesSo, the correct answer is 'Tropic hormones'.

Question 9

Thyroxin is secreted by which gland?

Accepted Answer

The thyroid gland is an endocrine gland at the front of the neck, just below the Adam's apple; it is made up of two lobes lying along the trachea joined by a thin band of thyroid tissue called the isthmus. The thyroid gland is controlled by the pituitary gland, situated at  the base of the brain. The pituitary gland stimulates the production of $T_3$ and $T_4$ by producing Thyroxin Stimulating Hormone (TSH), thyrotropin when the levels of thyroid hormones are low. Once $T_3$ and $T_4$ levels are high enough TSH levels decrease and the production of thyroid hormones decreases. The Pituitary gland is regulated by the hypothalamus which is part of the brain and secretes TSH Releasing Hormone, TRH.So, the correct option is option D.

Question 10

Endocrine glands are also called as ................. glands.

Accepted Answer

Endocrine glands are glands of the endocrine system that secrete their products, hormones, directly into the blood rather than through a duct. So, they are called as ductless glands. The major glands of the endocrine system include the pineal gland, pituitary gland, pancreas, ovaries, testes, thyroid gland, parathyroid gland, hypothalamus and adrenal glands.

Chemical Control And Integration

Biology
5425 Views

Which endocrine gland is associated with kidneys?

The LH surge is essentially a signal sent from the brain to the ovary,which indicates

The total islets of Langerhans in human pancreas are

The blood sugar level is regulated by

The gland which regulates blood sugar levels is/are

Which of the following is an emergency hormone

The source of male sex hormones is

A hormone that stimulates an endocrine gland to grow and secrete its hormone is known as

Thyroxin is secreted by which gland?

Endocrine glands are also called as ................. glands.

Chemical Control And Integration

Biology 5425 Views

Which endocrine gland is associated with kidneys?

The LH surge is essentially a signal sent from the brain to the ovary,which indicates

The total islets of Langerhans in human pancreas are

The blood sugar level is regulated by

The gland which regulates blood sugar levels is/are

Which of the following is an emergency hormone

The source of male sex hormones is

A hormone that stimulates an endocrine gland to grow and secrete its hormone is known as

Thyroxin is secreted by which gland?

Endocrine glands are also called as ................. glands.

Biology
5425 Views