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Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892

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Chapter
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BuyFindarrow_forward

Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892
Textbook Problem

How do hormones compare structurally and functionally in invertebrates and vertebrates?

Summary Introduction

To review:

The comparison of hormones, structurally and functionally, in invertebrates and vertebrates.

Introduction:

The animals present on the earth are classified into two major categories, vertebrate and invertebrate. Invertebrates lack the notochord, a well-developed skeletal system as well as a properly organized nervous system. Invertebrates account for a major portion of the animal kingdom.

Explanation
Structurally
Invertebrates Vertebrates
The hormones in invertebrates are secreted by the neurosecretory neurons present in the brain. The hormones in vertebrates are released by the hypothalamus, which stimulates as well as inhibits the secretion of the pituitary gland.
A few common hormones in invertebrates are peptides and steroids. Their structures are a little less modified as compared to vertebrates. The structures of hormones in vertebrates are different from those in invertebrates...

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