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Glandular System |
a. Give any his example of the exocrine glands.
= Salivary gland, tear glands, etc.
b. Name the hormones produced by the pancreas.
= Insulin and glucagon
c. Where is the pituitary gland located?
= The pituitary gland is located in the depression of the sphenoid bone in the skull.
d. Where is the thyroid gland situated?
= The thyroid gland is situated in the neck, one on either side of the upper part of the traches.
e. Name the disease which is caused by the deficiency of iodine in diet.
→ Thyroid disease is caused by the deficiency of iodine in diet.
f. Define hormone.
= Hormones are chemical substances that act like messenger molecules in the body.
g. Give or any to plant hormones which are growth inhibitors.
= sorry
h. Write any hormone two functions of ethylene as plant hormone.
= i. It ripens fruits, breaks seeds and buds dormancy, stimulates rapid elongated ion of petiole and internodes. elongation of petiole and internodes.
ii. It promotes senescence and abscission of leaves and flowers induces not growth and not hair formation.
2. Long answer type questions.
a. List the secretions of the pituitary glands. What are the effects of hyposecretion of growth hormone in animals?
= The secretions of the pituitary glands are:
i. Growth hormone
ii. Stimulatory hormone
The effects of hyposecretion of growth hormone in animals are: Dwarfism (Growth retardation)
b. Describe the functions of phytohormones in short.
= The functions of phytohormones are:
i. It promotes cell elongation of the root and stem and apical buds growth, prevents premature fall of the leaves, flowers and fruits, used in plants propagation; cutting and grafting, promotes flowering.
ii. It supports in cytokinesis, primates short growth, supports apical dominance induced by auxins, stimulate the formation of chloroplast.
iii. It promotes boltings before flowering in cabbage like plants elongation of stem, breaks seed dormancy.
c. Describe the role of calcitonin and parathormone to control the calcium level in blood.
→Calcitonin encourages calcium deposition in the bane and it decrease calcium level in blood Parathormone controls calcium metabolism of the body. It reduces excretion of calcium in urine. Normal calcium balance help in normal. growth of bank and teeth-Less secretion of parathormone leads to tetany which is characterized by marked. fall in calcium level in blood and twitching of muscles.
d. "Synthetic hormones are beneficial to farmers but harmful to consumers "Justify the statement.
→Synthetic hormones are beneficial to farmers, because they support in any yield by proper growth of plants, protecting the per fall of leaves, flowers, fruits, promoting flowering and fruiting but harmful to consumers because it includes breast tenderness, bloating, nausea, acne changes, changes in bleeding pattern, change in cholesterol levels, and changes in risk to some disease and cancers.
e. Describe the coordination between the nervous system and the glandular system in human body.
= Sorry
3. Give reason :
a. The pituitary gland is called the master gland.
→ Because it secrets stimulatory hormones.
b. Hormones are called chemical messengers.
→ Because hormones are the chemicals produced by endocrine and heterocrine glands.
c. The adrenal gland is also called an emergency gland.
= Because it secretes a hormone called adrenalin that prepares the body to face Emergency conditions of emotional stress like fall in blood pressure, pain, cold, fear, etc.
d. Pancreas is a mixed gland.
= Because
e. Phytohormones support to increase cop yield.
= Because
4. Diagrammatic questions.
a. Answer the following questions.
i. Name A D and F.
= A - Pituitary gland
D - Pancreas
F -
ii. Write the function of B, C, E.
= to control the speed of your metablossium
iii. What are the secretion of D. Also write the function of the secretion?
= The secretion of D are: Insulin and Glucagon
The function of the secretion are
i. Maintenance of level in blood.
ii. Supplies sugar in blood.
ix. What is the effect of the hypersecretion of B?
= The effect of the hypersecretion of R is Formation of tumor and kidney stones.
x. Which glands are inside B?
= Parathyroid
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