Neural vs Hormonal Coordination — NEET Biology
📚 Practice ConceptYou have already learnt that the neural system provides a point-to-point rapid coordination among organs. The neural coordination is fast but short-lived. As the nerve fibres do not innervate all cells of the body and the cellular functions need to be continuously regulated; a special kind of coordination and integration has to be provided. This function is carried out by hormones. The neural system and the endocrine system jointly coordinate and regulate the physiological functions in the body.
Which of the above statements are correct? S1: Hormones are non-nutrient chemicals that act as intercellular messengers and are produced in trace amounts. S2: The classical definition of hormones emphasizes their secretion by ductless glands and subsequent transport through blood to distantly located target organs. S3: The neural system, unlike the endocrine system, is primarily responsible for the continuous regulation of cellular functions throughout all cells of the body. S4: Hypothalamic hormones that regulate the anterior pituitary reach it through direct neural regulation, while the posterior pituitary is regulated by a portal circulatory system. S5: The endocrine systems of invertebrates are typically more complex and diverse than those found in vertebrates.
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