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प्रश्न
How does chemical coordination take place in animals?
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उत्तर
In animals, chemical coordination is coordinated by hormones. The organ system responsible for the synthesis and regulation of these hormones is known as the endocrine system. Hormones are secreted in very less amount by the endocrine glands. These glands being ductless, the secretions directly mix into the bloodstream. From there it moves to specific target organs where it shows its effects. For example, growth hormone is synthesized by the pituitary gland which mainly acts on the bones of a developing child and increases the height of the child.
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संबंधित प्रश्न
How does our body respond when adrenaline is secreted into the blood?
Name the hormones secreted by the given endocrine glands and specify one function.
Pituitary
Name the hormones secreted by the given endocrine glands and specify one function.
Pancreas
Where are hormones made in the human body?
Which gland secretes the growth hormone?
What part does the diet play in helping us to have a healthy thyroid gland?
Fill in the following blanks with suitable words :
The two examples of effectors are .........and ...........
Write the functions of testosterone and oestrogen hormones.
How does chemical coordination take place in human beings?
Why is the use of iodised salt advisable?
In what ways are puberty and adolescence result of the activity of some glands in the human body?
Which hormone controls the amount of glucose in blood?
Which of the following is a mis-matched pair?
Which of the following hormone prepares our body for action in emergency situations?
(a) testosterone
(b) growth hormone
(c) adrenaline
(d) insulin
A doctor advised a person to take injection of insulin because :
(a) his blood pressure was high
(b) his heart beat was high
(c) his blood sugar was high
(d) his thyroxine level in blood was high
The dramatic changes in body features associated with puberty are mainly because of the secretions of :
(a) estrogen from testes and testosterone from ovary
(b) estrogen from adrenal gland and testosterone from pituitary gland
(c) testosterone from testes and estrogen from ovary
(d) testosterone from thyroid gland and estrogen from pituitary gland
A and B are two pairs of glands that are present in the human endocrine system. The pair A is found only in females, whereas B is present only in males. Glands A make and secrete two hormones C and D, whereas glands B make and secrete only one hormone E. In addition to hormones, Glands A make gametes F, whereas glands B make gametes G.
(a) What are the glands A?
(b) What are the hormones C and D?
(c) What are the glands B? Name the hormone E.
(d) What are the gametes F and G?
(e) Which event in the life of males and females is associated with the secretion of the hormones C, D and E?
Name the gland and the hormone secreted by it in scary situations in human beings. List any two responses shown by our body when this hormone is secreted into the blood.
