Read the passage given below and answer the following questions from (i) to (v).
Hormones act as chemical messengers that are released into the blood stream to act on an organ in another part of the body. Endocrine systems, also referred to as hormone systems, are found in all mammals, birds, fish, and many other types of living organisms. They are made up of: (a) glands located throughout the body, (b) hormones that are made by the glands and released into the bloodstream or the fluid surrounding cells, and (c) Receptors in various organs and tissues that recognise and respond to the hormones.
(i) Name the hormone that regulates carbohydrate, protein, and fat metabolism in the body so as to provide the best balance for growth.
Thyroid
TSH
Thyroxine
Altroxin
(3)
Read the passage given below and answer the following questions from (i) to (v).
Hormones act as chemical messengers that are released into the blood stream to act on an organ in another part of the body. Endocrine systems, also referred to as hormone systems, are found in all mammals, birds, fish, and many other types of living organisms. They are made up of: (a) glands located throughout the body, (b) hormones that are made by the glands and released into the bloodstream or the fluid surrounding cells, and (c) Receptors in various organs and tissues that recognise and respond to the hormones.
(ii) Name the hormone that can make the heart beat faster, resulting in supply of more oxygen to our muscles.
insulin
thyroxine
nor-adrenaline
adrenaline
(4)
Read the passage given below and answer the following questions from (i) to (v).
Hormones act as chemical messengers that are released into the blood stream to act on an organ in another part of the body. Endocrine systems, also referred to as hormone systems, are found in all mammals, birds, fish, and many other types of living organisms. They are made up of: (a) glands located throughout the body, (b) hormones that are made by the glands and released into the bloodstream or the fluid surrounding cells, and (c) Receptors in various organs and tissues that recognise and respond to the hormones.
(iii) Which one of the following statements is not true?
Growth hormone is one of the hormones secreted by the pituitary.
Changes associated with puberty are because of the secretion of testosterone in males and oestrogen in females.
Hormones help in coordinated growth.
Control and coordination in human body depends only upon endocrine system.
(4)
Read the passage given below and answer the following questions from (i) to (v).
Hormones act as chemical messengers that are released into the blood stream to act on an organ in another part of the body. Endocrine systems, also referred to as hormone systems, are found in all mammals, birds, fish, and many other types of living organisms. They are made up of: (a) glands located throughout the body, (b) hormones that are made by the glands and released into the bloodstream or the fluid surrounding cells, and (c) Receptors in various organs and tissues that recognise and respond to the hormones.
(iv) In humans, the timing and amount of hormone released are regulated by:
flight mechanisms
feedback mechanisms
loop mechanisms
feeding mechanisms
(2)
Read the passage given below and answer the following questions from (i) to (v).
Hormones act as chemical messengers that are released into the blood stream to act on an organ in another part of the body. Endocrine systems, also referred to as hormone systems, are found in all mammals, birds, fish, and many other types of living organisms. They are made up of: (a) glands located throughout the body, (b) hormones that are made by the glands and released into the bloodstream or the fluid surrounding cells, and (c) Receptors in various organs and tissues that recognise and respond to the hormones.
(v) Insulin injections are given to the patients suffering with:
diabetes
nervous disorder
hyperactivity disorder
gastrointestinal diseases
(1)
Read the passage given below and answer the following questions from (i) to (v).
Plant hormones are a group of organic substances that occur naturally and influence plant physiological processes. Plant hormones are also called phytohormones and work as growth regulators. Main processes affected are growth, differentiation, and development. It is well known that several plant hormones are involved in the regulation of fruit development and ripening across fleshy and dry fruits.
(i) Concentration of which plant hormone stimulates the cells to grow longer on the side of the shoot which is away from light?
Renin
Auxin
Gibberellin
Cytokinin
(2)
Read the passage given below and answer the following questions from (i) to (v).
Plant hormones are a group of organic substances that occur naturally and influence plant physiological processes. Plant hormones are also called phytohormones and work as growth regulators. Main processes affected are growth, differentiation, and development. It is well known that several plant hormones are involved in the regulation of fruit development and ripening across fleshy and dry fruits.
(ii) Which hormone is likely to be present in greater concentration in the areas of rapid cell division, such as in fruits and seeds?
Pheromone
Auxin
Cytokinin
Gibberellin
(3)
Read the passage given below and answer the following questions from (i) to (v).
Plant hormones are a group of organic substances that occur naturally and influence plant physiological processes. Plant hormones are also called phytohormones and work as growth regulators. Main processes affected are growth, differentiation, and development. It is well known that several plant hormones are involved in the regulation of fruit development and ripening across fleshy and dry fruits.
(iii) Function of the plant hormone abscisic acid is to:
inhibit plant growth
help in flowering
promote plant height
control diseases in plants
(1)
Read the passage given below and answer the following questions from (i) to (v).
Plant hormones are a group of organic substances that occur naturally and influence plant physiological processes. Plant hormones are also called phytohormones and work as growth regulators. Main processes affected are growth, differentiation, and development. It is well known that several plant hormones are involved in the regulation of fruit development and ripening across fleshy and dry fruits.
(iv) Which one of the following statements is true?
When light is coming from one side of the plant, auxin diffuses towards the illuminated side of the shoot.
Plant hormones are synthesized at places away from where they act and simply diffuse to the area of action.
Cytokinin is involved in wilting of the leaves.
Electrical impulses cannot travel rapidly.
(2)
Read the passage given below and answer the following questions from (i) to (v).
Plant hormones are a group of organic substances that occur naturally and influence plant physiological processes. Plant hormones are also called phytohormones and work as growth regulators. Main processes affected are growth, differentiation, and development. It is well known that several plant hormones are involved in the regulation of fruit development and ripening across fleshy and dry fruits.
(v) Growth-related movements of plants are ____ the movements done in response to day and night.
slower than
faster than
equal to
likewise
(1)
