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

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

1 Answer

Answer :

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

Related questions

Give examples show that not all responses in plants are slow.

Description : Give examples show that not all responses in plants are slow.

Last Answer : Insectivorous plants like Venus fly trap responds very quickly to touch. The leaflets of touch me not plant (Mimosa Pudica) get folded immediately on touching.

What are endocrine glands? Give example.

Description : What are endocrine glands? Give example.

Last Answer : The glands that discharge their secretions directly into blood stream are called endocrine glands. Example: Pituitary gland, Thyroid gland

What are exocrine glands? Give example.

Description : What are exocrine glands? Give example.

Last Answer : The glands that discharge their secretions through the ducts to their target organs are called exocrine glands. Ex: Salivary gland, pancreas.

Mention the types of growth regulators and give example.

Description : Mention the types of growth regulators and give example.

Last Answer : a) Plant growth promoters ex: Auxins, Gibberellins, cytokinins b) Plant growth inhibitors ex: Abscisic acid, Ethylene

What are phytohormones? Give example.

Description : What are phytohormones? Give example.

Last Answer : Plant hormones are also called phytohormones. They are organic compounds which are produced by tissues that regulate plant growth and development.

Give an example of irritability.science Control-&-Co-ordination-in-Plants-&-Animals

Description : Give an example of irritability.

Last Answer : If an earthworm is touched, it moves away from the place. Plants grow towards the light.

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

By which nervous system and of what type, the blood is supplied into visceral organs? (a) Both SNS and PNS, involuntary (b) Para-sympathetic nervous system involuntary (c) Sympathetic nervous system, involuntary (d) Sympathetic nervous system, voluntary

Description : By which nervous system and of what type, the blood is supplied into visceral organs? (a) Both SNS and PNS, involuntary (b) Para-sympathetic nervous system involuntary (c) Sympathetic nervous system, involuntary (d) Sympathetic nervous system, voluntary

Last Answer : (a) Both SNS and PNS, involuntary

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.

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 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.

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.

What are pons? Write their function.

Description : What are pons? Write their function.

Last Answer : Pons form the middle part of the hind brain. It acts as a conducting medium carrying impulse from one hemisphere of cerebellum to the other. Out of the 12 pairs of cranial nerves that ... centres of mastication (chewing), facial expressions, and respiration. b) It forms the conducting pathway.

What is cerebellum? Write its function.

Description : What is cerebellum? Write its function.

Last Answer : Cerebellum is a small region located between pons and medulla oblongata. The functions of cerebellum are: a) It is responsible for the maintenance of equilibrium and posture of the body. b) It co-ordinates and controls the movement of muscles in actions like walking or running.

State the function of hypothalamus.

Description : State the function of hypothalamus.

Last Answer : a) Hypothalamus regulates body temperature, water balance, appetite and sleep. b) It controls autonomic nervous system. c) It forms a part of the pituitary gland.

State the function of thalamus.

Description : State the function of thalamus.

Last Answer : The function of thalamus is to receive nerve impulse from the sense organs and send them to the upper region.

State the function of progesterone.

Description : State the function of progesterone.

Last Answer : Progesterone stimulates the changes in the uterus during menstrual cycle and pregnancy.

Name the hormone secreted by ovaries. State its function.

Description : Name the hormone secreted by ovaries. State its function.

Last Answer : The ovaries secrete female sex hormones called estrogens. The function of estrogen is to help in the appearance of feminine characteristics at puberty.

Name the hormone secreted by testis. State its function.

Description : Name the hormone secreted by testis. State its function.

Last Answer : Testis secretes the male sex hormone called androgen. The most common hormone is testosterone. The function of testosterone is to help in the appearance of masculine characteristics at puberty.

Name the hormone secreted by the adrenal cortex. Mention its function.

Description : Name the hormone secreted by the adrenal cortex. Mention its function.

Last Answer : One of the important hormones secreted by adrenal cortex is cortisone. It regulates the rate of metabolism and the concentration of salts in the blood.

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.

Where are parathyroid glands located? Mention the hormone secreted. Mention the disorder caused due to its under secretion and over secretion. State its function.

Description : Where are parathyroid glands located? Mention the hormone secreted. Mention the disorder caused due to its under secretion and over secretion. State its function.

Last Answer : Parathyroid glands are embedded in the tissues of thyroid gland. Parathyroid gland secreted a hormone called parathormone. The function of parathormone is to control the amount of calcium salts in ... cramps. Over secretion of parathormone removes calcium from the bones making them soft and spongy.

‘Rest and digest’ state can be described as (a) Sympathetic active; para-sympathetic quiescent (b) Sympathetic active; para-sympathetic active (c) Sympathetic quiescent; para-sympathetic active

Description : ‘Rest and digest’ state can be described as (a) Sympathetic active; para-sympathetic quiescent (b) Sympathetic active; para-sympathetic active (c) Sympathetic quiescent; para-sympathetic active

Last Answer : Ans: C

‘Fight or flight’ state can be described as (a) Sympathetic active; para-sympathetic quiescent (b) Sympathetic active; para-sympathetic active (c) Sympathetic quiescent; para-sympathetic active

Description : ‘Fight or flight’ state can be described as (a) Sympathetic active; para-sympathetic quiescent (b) Sympathetic active; para-sympathetic active (c) Sympathetic quiescent; para-sympathetic active

Last Answer : Ans: A

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.

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.

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.

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.

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.

Give reason: A drunkard walks unsteadily.

Description : Give reason: A drunkard walks unsteadily.

Last Answer : The alcohol affects the cerebellum which is responsible for maintaining balance of the body. It is not able to control and coordinate the movement of muscles while walking.

“An injury to the left cerebral hemisphere may result in paralysis of organs on the right side”. Give reason.

Description : “An injury to the left cerebral hemisphere may result in paralysis of organs on the right side”. Give reason.

Last Answer : The nerves coming from the right side of the body are connected to the left cerebral hemisphere.

Give reason: Person suffering from diabetes incipidus pass large quantity of dilute urine.

Description : Give reason: Person suffering from diabetes incipidus pass large quantity of dilute urine.

Last Answer : Since reabsorption of water in the kidneys has decreased

Give reason: Phytohormones are also called growth regulators.

Description : Give reason: Phytohormones are also called growth regulators.

Last Answer : Phytohormones are organic compounds which regulate plant growth and development in plants. Hence they are called growth regulators also.

Give reason: Response in plants cannot be observed immediately

Description : Give reason: Response in plants cannot be observed immediately

Last Answer : Response in plants is very slow. Hence it cannot be observed immediately.

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

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 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.

Briefly explain the Central Nervous System.

Description : Briefly explain the Central Nervous System.

Last Answer : a) The components of the central nervous system are brain and spinal cord. b) The brain and the spinal cord are covered by three membranes namely outer Duramater, middle Arachnoid and the inner ... is filled by the cerebro-spinal fluid. This fluid circulates between the brain and the spinal cord.

Name the three divisions of the human nervous system.

Description : Name the three divisions of the human nervous system.

Last Answer : The human nervous system consists of three components namely a) Central Nervous System (CNS) b) Peripheral Nervous System (PNS) c) Autonomic Nervous System (ANS)

Name the three divisions of the nervous system.

Description : Name the three divisions of the nervous system.

Last Answer : Nervous system consists of receptors, effectors and conductors.

What is the importance of nervous system?

Description : What is the importance of nervous system?

Last Answer : a) Nervous system controls and coordinates various activities and functions of different organs and organ systems in the body. b) It regulates both voluntary and involuntary activities of the body. c) It enables ... us to think, reason and remember. e) It controls all the reflex actions of the body.

Mention the two methods of co-ordination of organ system in multi-cellular organisms.

Description : Mention the two methods of co-ordination of organ system in multi-cellular organisms.

Last Answer : Co-ordination of various organ systems in multi-cellular organisms is brought about in two ways a) Control by nervous system b) Control by endocrine system

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.

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.