What is the role of insulin in regulating the level of glucose in the blood?

What is the role of insulin in regulating the level of glucose in the blood?
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1 Answer

Answer :

Insulin promotes the conversion of glucose to glycogen for storage in liver and muscles. It is secreted when blood glucose levels are high.
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Related questions

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.

Give reason: Choroid is thick and rich with blood vessels

Description : Give reason: Choroid is thick and rich with blood vessels

Last Answer : Choroid has a layer of blood vessels which nourishes the back of the eye.

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.

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.

Explain the functioning of the eye.

Description : Explain the functioning of the eye.

Last Answer : a) The light ray reflected from the object are focussed on the retina to from the image on the retina b) The receptor cells in the region are stimulated by photochemical reactions. c) The ... visual centre in the cerebrum. d) The impulses are interpreted in the cerebrum, resulting in vision.

What are these? a) Sclera:

Description : What are these? a) Sclera:

Last Answer : a) Sclera: It is the outermost layer of the eye b) Cornea: The bulged transparent front portion of the sclera. It allows light to enter the eyeball. c) Conjunctiva: It is a thin membrane that ... optic nerve exits the eye ball where no image is formed. Rods and cones are absent in this region.

Which are the two fluids present in the eyeball? Mention their functions.

Description : Which are the two fluids present in the eyeball? Mention their functions.

Last Answer : The area between the cornea and the lens is filled with a fluid called aqueous humour. The space between the cornea and the lens is filled with a thick fluid called vitreous humour. The fluids help in refraction of light rays and maintain the shape of the eye ball.

Describe the structure of eye.

Description : Describe the structure of eye.

Last Answer : a) The wall of the eye is made up of three layers namely outer sclera, the middle choroid and the inner retina. b) The sclerotic layer has a bulged, transparent portion called cornea. ... thick fluid called vitreous humour. g) The inner retina layer contains receptor cells called rods and cones.

What are lacrymal glands or tear glands?

Description : What are lacrymal glands or tear glands?

Last Answer : Lacrymal glands are the glands present in the outer region of the upper eye lid. It produces secretions that keeps the surface of the eyes moist and wash out dust when we blink.

How are the eyes protected? OR Name the accessory parts of the human eye. State their function.

Description : How are the eyes protected? OR Name the accessory parts of the human eye. State their function.

Last Answer : The four accessory parts of human eye are eye brows, eye lid, eye lashes and lacrymal glands. a) The eye brows protect the eye from small particles that fall from above the eye and provide ... The lacrymal gland produces tears which keep the surface of the eyes moist and wash the dust particles.

What are sense organs? Name them.

Description : What are sense organs? Name them.

Last Answer : The organs through which we sense the objects in our environment are known as sense organs. The five sense organs are eyes, ears, nose, tongue and skin.

Give an example to show that sympathetic and para-sympathetic system work opposite in function.

Description : Give an example to show that sympathetic and para-sympathetic system work opposite in function.

Last Answer : Sympathetic system stimulates the pupil in the eye to dilate (open) where as parasympathetic system stimulates it to constrict (close).

Mention the two parts of the autonomic nervous system.

Description : Mention the two parts of the autonomic nervous system.

Last Answer : The two parts of the autonomic nervous system are: a) Sympathetic system b) para sympathetic system

State the function of autonomic nervous system.

Description : State the function of autonomic nervous system.

Last Answer : The function of autonomic nervous system is to regulate the involuntary actions of the body

What is autonomic nervous system?

Description : What is autonomic nervous system?

Last Answer : Autonomic nervous system consists of a set of peripheral nerves that connect the organs like heart, lungs and digestive tract and other internal organs.

What are cranial nerves?

Description : What are cranial nerves?

Last Answer : Cranial nerves are the nerves that originate from the different parts of the brain. It connects the sense organs, muscles and glands of the head.

What is peripheral nervous system?

Description : What is peripheral nervous system?

Last Answer : Peripheral nervous system consists of the nerves between the brain, spinal cord and various organs. It includes 12 pairs of cranial nerves and 31 pairs of spinal nerves.

Mention the parts of a reflex arc.

Description : Mention the parts of a reflex arc.

Last Answer : The five distinct parts of a reflex arc are: a) A receptor to receive stimulus (sense organs) b) Sensory neurons to conduct the impulses from receptors to the spinal cord or the hind brain. c) ... pass the impulse to an effector. e) An effector to take necessary action in response to the stimulus.

What is reflex arc?

Description : What is reflex arc?

Last Answer : The pathway of the nerve impulse involved in reflex action is called reflex-arc.

What is reflex action? Which is the centre of such action?

Description : What is reflex action? Which is the centre of such action?

Last Answer : Reflex action is an automatic response to an external stimulus. The centre of reflex action is spinal cord. The actions are independent of the brain. Ex: a) when we touch a hot object, we withdraw out hand b) When we step on a thorn unknowingly we withdraw our leg.

State the function of spinal cord.

Description : State the function of spinal cord.

Last Answer : Spinal cord co-ordinates the movements of limbs and organs in the body by reflex action.

Describe the structure of the spinal cord.

Description : Describe the structure of the spinal cord.

Last Answer : a) Spinal cord is a part of the central nervous system. b) It is a downward continuation of the medulla oblongata. c) It is a long cylindrical structure protected by the vertebral column. d) It is ... , lungs, stomach etc,. g) The spinal nerves are made up of both sensory and motor nerve fibres.