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zhenek [66]
3 years ago
8

Scientists believe that the polar bear in Alaska and the brown bear in Russia evolved from a common ancestor.

Biology
1 answer:
const2013 [10]3 years ago
5 0
True is the answer to the question
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In this question we are going to answer a series of questions about the human endocrine system, hormone release and homeostasis.

<h3>What is human endocrine system, hormone release and homeostasis?</h3>

1. Endocrine glands produce hormones and release them directly into the bloodstream.

Hormones are the products of secretion from the endocrine glands. They control various activities in the human body, hence the importance of these glands.

2. It is through the feedback mechanism that, for example, the regulation of hormone secretion and the control of temperature and blood pressure occur.

Thanks to this control, it is possible to guarantee the harmony of the systems and, consequently, the homeostasis (balance of the internal environment).

3. Hormones can be divided into four groups, based on their chemical structure,form of synthesis and storage, solubility, half-life, form of transport, receptors on cell and mechanism of action:

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Both positive and negative feedback are extremely important for our body to function properly. However, these two mechanisms have differences. In negative feedback, the body produces a response that reduces the initial stimulus, while in positive feedback, the response reinforces the stimulus.

Learn more about Hormones in brainly.com/question/13020697

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<em>Which phrase describes one characteristic of radioactive elements isotope</em>

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