What are islets of Langerhans?

What are islets of Langerhans?
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1 Answer

Answer :

The cells of endocrine gland of pancreas are called islets of Langerhans.
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Related questions

Mention the hormones secreted by islets of Langerhans. State their function.

Description : Mention the hormones secreted by islets of Langerhans. State their function.

Last Answer : The hormones secreted by islets of Langerhans are insulin and glucagon. The functions are: Insulin promotes the conversion of glucose to glycogen for storage in liver and muscles. It is secreted ... the conversion of glycogen into glucose. It is secreted when blood glucose levels are low.

Islets of langerhans ____________ and are found in _________________

Description : Islets of langerhans ____________ and are found in _________________

Last Answer : Islets of langerhans ____________ and are found in _________________ A. Modified lymph glands, pancreas ... area, pituitary D. Small tubules, kidney

Beta cells of islets of langerhans secrete_____

Description : Beta cells of islets of langerhans secrete_____

Last Answer : Beta cells of islets of langerhans secrete_____

Alpha cells of islets of langerhans secrete____

Description : Alpha cells of islets of langerhans secrete____

Last Answer : Alpha cells of islets of langerhans secrete____

The effect caused by non-functioning of islets of Langerhans is

Description : The effect caused by non-functioning of islets of Langerhans is

Last Answer : The effect caused by non-functioning of islets of Langerhans is A. Heart beat rate increase B. Increased BMR C. Hyperglycaemia D. Tetany

Glucagon produced by `alpha`-cells of islets of Langerhans

Description : Glucagon produced by `alpha`-cells of islets of Langerhans

Last Answer : Glucagon produced by `alpha`-cells of islets of Langerhans A. Converts glucose to glycogen B. Converts ... of glucose in blood D. None of these

Alloxan can experimentally induce diabetes mellitus due to (A) Stimulation of α cells of the islets of langerhans (B) Necrosis of the β cells of the islets (C) Potentiation of insulinase activity (D) Epinephrine like action

Description : Alloxan can experimentally induce diabetes mellitus due to (A) Stimulation of α cells of the islets of langerhans (B) Necrosis of the β cells of the islets (C) Potentiation of insulinase activity (D) Epinephrine like action

Last Answer : Answer : B

All of the following statements about bronzed diabetes are true except (A) It is caused by excessive intake of copper (B) Skin becomes pigmented (C) There is damage to β cells of Islets of Langerhans (D) Liver is damaged

Description : All of the following statements about bronzed diabetes are true except (A) It is caused by excessive intake of copper (B) Skin becomes pigmented (C) There is damage to β cells of Islets of Langerhans (D) Liver is damaged

Last Answer : Answer : A

All of the following statements about pancreatic somatostain are true except (A) It is secreted by δ cells of islets of Langerhans (B) It stimulates the secretion of gastrin (C) It inhibits the secretion of secretin (D) It inhibits the secretion of cholecystokininpancreozymin

Description : All of the following statements about pancreatic somatostain are true except (A) It is secreted by δ cells of islets of Langerhans (B) It stimulates the secretion of gastrin (C) It inhibits the secretion of secretin (D) It inhibits the secretion of cholecystokininpancreozymin

Last Answer : Answer : B

α Cells of Islets of Langerhans secrete (A) Insulin (B) Glucagon (C) Somatostatin (D) Cholecystokinin

Description : α Cells of Islets of Langerhans secrete (A) Insulin (B) Glucagon (C) Somatostatin (D) Cholecystokinin

Last Answer : Answer : B

Which cells in pancreas produce Insulin? (1) Thymus (2) Estrogen (3) Corpus epididymis (4) Islets of Langerhans

Description : Which cells in pancreas produce Insulin? (1) Thymus (2) Estrogen (3) Corpus epididymis (4) Islets of Langerhans

Last Answer : (4) Islets of Langerhans Explanation: The islets of Langerhans are the regions of the pancreas that contain cells that produce hormones. There are five types of cells in the islets ... : PP cells secrete pancreatic polypeptide; delta cells secrete somatostatin; and epsilon cells secrete ghrelin.

What do you mean by islets of langerhans?

Description : What do you mean by islets of langerhans?

Last Answer : A small group of cells in the pancrease which acts as endocrine gland is called islets of langerhans.  

What is correct to say about the hormone action in humans? (a) Glucagon is secreted by β-cells of islets of Langerhans and stimulates glycogenolysis. (b) Secretion of thymosins is stimulated with aging. (c) In females, FSH first binds with specific receptors on ovarian cell membrane. (d) FSH stimulates the secretion of estrogen and progesterone.

Description : What is correct to say about the hormone action in humans? (a) Glucagon is secreted by β-cells of islets of Langerhans and stimulates glycogenolysis. (b) Secretion of thymosins is stimulated ... receptors on ovarian cell membrane. (d) FSH stimulates the secretion of estrogen and progesterone.

Last Answer : (c) In females, FSH first binds with specific receptors on ovarian cell membrane.

Select the correct matching of a hormone, its source and function. Hormone Source Function (a) Vasopressin Posterior Increases loss pituitary of water through urine (b) Norepine- Adrenal Increases heart phrine medulla beat, rate of respiration and alterness (c) Glucagon Beta-cells Stimulates of Islets of glycogenolysis Langerhans (d) Prolactin Posterior Regulates growth pituitary of mammary glands and milk formation in females

Description : Select the correct matching of a hormone, its source and function. Hormone Source Function (a) Vasopressin Posterior Increases loss pituitary of water through urine (b) Norepine- Adrenal ... (d) Prolactin Posterior Regulates growth pituitary of mammary glands and milk formation in females

Last Answer : (b) Norepine- Adrenal Increases heart phrine medulla beat, rate of respiration and alterness

Match the following structures with their respective location in organs. (A) Crypts of Lieberkuhn (i) Pancreas (B) Glisson’s Capsule (ii) Duodenum (C) Islets of Langerhans (iii) Small intestine (D) Brunner’s Glands (iv) Liver Select the correct option from the following: (A) (B) (C) (D) (a) (iii) (ii) (i) (iv) (b) (iii) (i) (ii) (iv) (c) (ii) (iv) (i) (iii) (d) (iii) (iv) (i) (ii)

Description : Match the following structures with their respective location in organs. (A) Crypts of Lieberkuhn (i) Pancreas (B) Glisson's Capsule (ii) Duodenum (C) Islets of Langerhans (iii) Small intestine (D) Brunner's Glands (iv) Liver Select the ... ii) (iv) (c) (ii) (iv) (i) (iii) (d) (iii) (iv) (i) (ii)

Last Answer : (d) (iii) (iv) (i) (ii)

Which endocrine organ acts like the postganglionic neurons of the sympathetic nervous system? A) thyroid gland B) thymus gland C) adrenal cortex D) adrenal medulla E) islets of Langerhans of the pancreas

Description : Which endocrine organ acts like the postganglionic neurons of the sympathetic nervous system? A) thyroid gland B) thymus gland C) adrenal cortex D) adrenal medulla E) islets of Langerhans of the pancreas

Last Answer : D) adrenal medulla

What is correct to say about the hormone action in humans ? (1) FSH stimulates the secretion of estrogen and progesterone (2) Glucagon is secreted by -cells of Islets of Langerhans and stimulates glycogenolysis (3) Secretion of thymosins is stimulated with aging (4) If females, FSH first binds with specific receptors on ovarian cell membrane

Description : What is correct to say about the hormone action in humans ? (1) FSH stimulates the secretion of estrogen and progesterone (2) Glucagon is secreted by -cells of Islets of Langerhans and ... stimulated with aging (4) If females, FSH first binds with specific receptors on ovarian cell membrane

Last Answer : (4) If females, FSH first binds with specific receptors on ovarian cell membrane

Which cells in pancreas produce Insulin ? (1) Thymus (2) Estrogen (3) Corpus epididymis (4) Islets of Langerhans

Description : Which cells in pancreas produce Insulin ? (1) Thymus (2) Estrogen (3) Corpus epididymis (4) Islets of Langerhans

Last Answer : Islets of Langerhans

What structures enable the skin to function as a sense organ?

Description : What structures enable the skin to function as a sense organ?

Last Answer : Sensory receptors are distributed all over the skin which perceive the stimuli. Touch receptors are located near the surface of the skin. Pressure receptors and pain receptors are located deep inside the skin.

After relay race, Runner-A pours glucose powder into his mouth. Runner-B tastes the glucose slowly with the tip of his tongue. Whom do you think, experiences the sweetness most? Why?

Description : After relay race, Runner-A pours glucose powder into his mouth. Runner-B tastes the glucose slowly with the tip of his tongue. Whom do you think, experiences the sweetness most? Why?

Last Answer : Runner-B experiences most sweetness because the taste buds of sweetness are distributed in the front.

Briefly explain the mechanism of taste.

Description : Briefly explain the mechanism of taste.

Last Answer : Food that is eaten mixes with saliva and enters the pores of the taste buds. They chemically stimulate the sensory cells. These cells convert the chemical stimuli into electrical impulses. The electric impulses pass to the brain through the sensory neuron. The brain interprets the impulses as taste.

Explain the structure of tongue.

Description : Explain the structure of tongue.

Last Answer : The tongue is covered by a mucus membrane. It has numerous tiny sensory cells called taste buds. Taste buds are composed of a cluster of cells with receptors lying in a small depression on the surface.

Explain how a pea or a button which has got into the nasal cavity be removed. OR What is the first aid to be provided to a person who got a pea or a button into the nasal cavity accidentally?

Description : Explain how a pea or a button which has got into the nasal cavity be removed. OR What is the first aid to be provided to a person who got a pea or a button into the nasal cavity accidentally?

Last Answer : If a pea or a button gets into the nasal cavity accidentally, give a pinch of snuff to the person. It causes violent sneezing and the foreign body will be thrown out. Visit a doctor if the above method does not work.

Why does food appear relatively tasteless when one has cold or running nose?

Description : Why does food appear relatively tasteless when one has cold or running nose?

Last Answer : When you put food in your mouth, odour molecules from that food travel through the enter nose and stimulate the olfactory receptor cells at the top of your nasal cavity, If mucus in your ... receptor cells. Thus, the brain receives no signal identifying the odour Hence food eaten appears tasteless.

Briefly explain the sensation of smell.

Description : Briefly explain the sensation of smell.

Last Answer : The molecules from the substance escapes and are carried by the inhaled air. On reaching the olfactory epithelium, they get dissolved in the mucus and stimulate the receptors. The stimulations are ... olfactory nerve to the brain. Here it interprets the impulses and gives the sensation of smell.

Briefly explain the structure of the human nose.

Description : Briefly explain the structure of the human nose.

Last Answer : The nasal cavity is lined by olfactory epithelium. The upper part of the nasal cavity has receptors of smell. The receptors are connected with the olfactory nerve. The olfactory nerve carries the impulses to the brain.

Give reason: a) A strong blow on the ears is very dangerous.b) When there is severe throat infection we normally get ear pain.

Description : Give reason: a) A strong blow on the ears is very dangerous.b) When there is severe throat infection we normally get ear pain.

Last Answer : a) A strong blow on the ears is very dangerous.As it would damage the semicircular canals and cochlea. This would lead to leakage of of fluids and sometimes even death, with ear ... pain. Throat infections affect the middle ear because eustachian tubes connect the middle ears and the throat.

What are the cares to be taken of the ear?

Description : What are the cares to be taken of the ear?

Last Answer : a) Hardened wax from the auditory canal should not be removed using sharp objects as they damage the eardrum. b) Loud noise must be avoided as they damage the eardrum. c) Visit a doctor if ... hearing. e) Small insects entering the ear can be removed by filling the external ear with salt water.

What are these? State their function a) Pinna

Description : What are these? State their function a) Pinna

Last Answer : a) Pinna: It is a cartilagenous organ covered with skin. It collects sound waves and directs them into the auditory canal. b) Tympanum: It is an obliquely placed membrane at the end of ... called Cochlea. It also contains a delicate structure called organ of corti which forms the auditory nerve.

How is the ear protected?

Description : How is the ear protected?

Last Answer : a) The auditory canal has hairs at its opening to prevent tiny particles from entering the ear. b) The wax secreting cells on the inner lining of the auditory canal produces wax that traps small organisms and dust.

a) What is organ of corti? b) Name the liquids that are present in inner ear.

Description : a) What is organ of corti? b) Name the liquids that are present in inner ear.

Last Answer : a) Cochlea has delicate structures called organ of corti, which have receptors that join to form the auditory nerve. b) The entire ear is filled with a fluid called endolymph. The inner ear is surrounded by a fluid called perilymph.

Describe the structure of the human ear.

Description : Describe the structure of the human ear.

Last Answer : a) The human ear is divided into three parts namely the outer ear, the middle ear and the inner ear. b) The outer ear consists of pinna, auditory canal and the tympanum. c) Pinna is ... Cochlea has delicate structures called organ of corti, which have receptors that join to form the auditory nerve.

What are the precautions to be taken regarding the care of the eyes?

Description : What are the precautions to be taken regarding the care of the eyes?

Last Answer : a) Do not strain your eyes by reading in dim light b) Avoid reading books during journey on roads. c) Avoid very bright light. d) Avoid watching television from a short distance. e) Avoid working on ... with cold clean water atleast twice a day. g) Consult an eye specialist in case of any problem.

A person is not able to identify the colours in the traffic signal. What disease is he suffering from?

Description : A person is not able to identify the colours in the traffic signal. What disease is he suffering from?

Last Answer : The disease is called colour blindness. It is a genetic disorder in which a person is unable to differentiate colours.

What is Glaucoma?

Description : What is Glaucoma?

Last Answer : Glaucoma is a disorder of the eye. The eyeball of a person suffering from glaucoma gradually hardens. The person sees flashes of light and coloured rings around the objects. The vision gradually decreases and leads to blindness. It occurs in persons above forty years of age.

What is astigmatism? How can it be corrected?

Description : What is astigmatism? How can it be corrected?

Last Answer : Astigmatism is a defect in which, a person looking at horizontal or vertical lines appears distorted. It is caused due to the unevenness of the crystalline lens. It can be corrected by using cylindrical lenses.

A person is advised vitrectomy surgery. Which gland which is not functioning properly?

Description : A person is advised vitrectomy surgery. Which gland which is not functioning properly?

Last Answer : Islets of Langerhans.

What is vitrectomy?

Description : What is vitrectomy?

Last Answer : Vitrectomy is a major surgical procedure to treat diabetic retinopathy. In this procedure the blood that has leaked into the vitreous humour is removed and vision is restored.

What is diabetic retinopathy? How can it be prevented?

Description : What is diabetic retinopathy? How can it be prevented?

Last Answer : Diabetic retinopathy is a disorder of the eye that occurs in people suffering from diabetes. After many years of diabetes, the blood vessels of the retina may leak, close-up or begin to grow. ... enter the vitreous humour making it opaque. It can be prevented by early treatment with laser beam.

What is cataract?

Description : What is cataract?

Last Answer : Cataract is a disorder of the eye in which the lens of the eye becomes cloudy, causing partial or total blindness.

What is Presbyopia?

Description : What is Presbyopia?

Last Answer : Presbyopia is a defect in which a person can see neither near-by nor far off objects clearly. It occurs at old age due to the loss of elasticity of eye lens.

Give reason: A convex lens is used to correct hypermetropia.

Description : Give reason: A convex lens is used to correct hypermetropia.

Last Answer : In a hypermetropic eye, light is focused behind the retina. A convex lens will force it to form on the retina. Hence a convex lens is used to correct hypermetropia.

What is hyper-metropia? How can it be corrected?

Description : What is hyper-metropia? How can it be corrected?

Last Answer : Hyper-metropia is a defect in which a person can see far off objects clearly but cannot see the near-by objects clearly. It is caused due to the flattening of eye ball. It can be corrected by using convex lens.

Give reason: A concave lens is used to correct myopia.

Description : Give reason: A concave lens is used to correct myopia.

Last Answer : In a myopic eye light falls too short from the retina. A concave lens forces light to fall on the retina. Hence concave lens is used to correct myopia.

What is myopia? How can it be corrected?

Description : What is myopia? How can it be corrected?

Last Answer : Myopia is a defect of the eye in which the person can see near by objects but cannot see far off objects clearly. It is caused due to the bulging of the eye ball or elongation of the eye ball. It can be corrected by using concave lens.

Mention the common defects of the eye.

Description : Mention the common defects of the eye.

Last Answer : a) Myopic or short sight b) Hyper-metropia or long sight c) Presbyopia d) Nyctolopia or night blindness e) Cataract

Give reason: a) When we suddenly enter a cinema hall, we will not be able to see any objects.b) There is no image formation at blind spot.

Description : Give reason: a) When we suddenly enter a cinema hall, we will not be able to see any objects.b) There is no image formation at blind spot.

Last Answer : a) When we suddenly enter a cinema hall, we will not be able to see any objects. Our eyes take some time to adjust to the light in the surroundings. When we are in bright area pupil constricts. ... region where the optic nerve exits the eye ball. There are no sensory cells. Hence no image is formed.

What is meant by accommodation of the eye?

Description : What is meant by accommodation of the eye?

Last Answer : The ability of the eye lens to see both near by and far away objects clearly is called accommodation of the eye.

How is the human eye able to adjust to near and far objects?

Description : How is the human eye able to adjust to near and far objects?

Last Answer : The human eye is able to adjust to near and far objects by altering the focal length of the lens. When we see a near by object, the muscles around the lens contract which increase the convexity ... we see a distant object, the muscles around the lens relax which decreases the convexity of the lens.