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How does chemical coordination take place in animals?
Endocrine glands­čí¬hormones ­čí¬blood­čí¬organ/tissues­čí¬biochemical/physiological activity
Endocrine glands­čí¬hormones ­čí¬ biochemical/physiological activity­čí¬blood­čí¬organ/tissues
hormones ­čí¬ biochemical/physiological activity ­čí¬blood­čí¬organ/tissues­čí¬ Endocrine glands
hormones ­čí¬ biochemical/physiological activity ­čí¬ Endocrine glands ­čí¬blood­čí¬organ/tissues

Answer
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Hint:Chemical coordination is present between the cells or different organs within the body. They release specific chemicals which regulates the activity of other cells of the body. For example-endocrine gland and exocrine glands.

Complete Answer:
To answer this question, we must know about the chemical coordination system in our body.
The chemical coordination of the body is carried out by two types of glands- exocrine glands and the endocrine glands.
>Exocrine glands are the glands which secrete their juices through a duct. For example - salivary gland.
>Endocrine glands- These are also known as ductless glands. They secrete their juices directly in the bloodstream. They secrete hormones which are known as chemical messengers. These hormones are target specific and act on the specific organs. They are regulated by the pituitary located in the brain. Example- Adrenal gland, thyroid gland.
Action mechanism-
The pituitary gland signals the other gland to secrete hormones. The endocrine gland secretes hormones directly into the blood. Through the blood, the hormones reach the target organ or tissues where it carries out its bio-physiological activity.

Thus the correct answer is option (A).

Note:The glands which secrete hormones are called the endocrine glands. Hormones are the signalling molecule produced by the endocrine glands and are transported through the circulatory system. Hormones are mainly derivatives of steroids and proteins.
Last updated date: 24th May 2023
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