Ch. 46 - Chemical Signals in Animals

Freeman - Biological Science 8th Edition

Freeman8th EditionBiological ScienceISBN: 9780138276263Not the one you use?Change textbook

Freeman 8th Edition

Ch. 46 - Chemical Signals in Animals

Problem 6

Chapter 46, Problem 6

Why is the observation that one hormone may bind to more than one type of receptor important?

Verified step by step guidance

Step 1: Understand the concept of hormones and receptors. Hormones are chemical messengers that are secreted directly into the blood, which carries them to organs and tissues of the body to exert their functions. Receptors are proteins on or inside cells with a specific binding site for a specific hormone.

Step 2: Understand the significance of hormone-receptor binding. When a hormone binds to its receptor, it causes a change in the function of the cell. This is how hormones exert their effects on the body.

Step 3: Consider the implications of one hormone binding to more than one type of receptor. This means that a single hormone can have different effects in different tissues or organs, depending on the type of receptor it binds to.

Step 4: Reflect on the importance of this observation. This allows for a high degree of complexity and flexibility in the body's responses to hormonal signals. It also means that the effects of a hormone can be modified by changes in the number or type of receptors present in a tissue.

Step 5: Apply this understanding to real-world scenarios. This knowledge can be used in the development of drugs that target specific hormone receptors, allowing for more precise and effective treatments.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Hormone-Receptor Interaction

Hormones are signaling molecules that bind to specific receptors on target cells to elicit a response. The interaction between a hormone and its receptor is crucial for cellular communication and regulation of physiological processes. Understanding this interaction helps explain how hormones can influence multiple systems in the body.

Receptor Diversity

Receptors can vary in structure and function, allowing a single hormone to bind to different types of receptors. This diversity enables a hormone to trigger various responses in different tissues, contributing to the complexity of hormonal regulation. For example, adrenaline can bind to both alpha and beta receptors, leading to different physiological effects.

Physiological Significance

The ability of a hormone to bind to multiple receptors is significant because it allows for a coordinated response across different organs and systems. This mechanism ensures that the body can adapt to various stimuli and maintain homeostasis. It highlights the importance of hormonal signaling in processes such as stress response, metabolism, and growth.

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Suppose that during a detailed anatomical study of a marine invertebrate, you found a small, previously undescribed structure. How would you test the hypothesis that the structure is a gland that releases one or more hormones?

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Design a study to test the hypothesis that the symptoms of jet lag are caused by disruption of normal daily cortisol rhythms.

Textbook Question

Compare and contrast the modes of action of lipid-soluble and water-soluble hormones.

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Textbook Question

True or False: In hormone systems, negative feedback occurs when the presence of a hormone inhibits release of the hormone.

Textbook Question

Which of the following assertions regarding hormones is correct? Select True or False for each statement.

T/F Growth and metamorphosis are controlled by hormones.

T/F Cortisol stimulates the production of ACTH.

T/F Hormones produced by the hypothalamus are considered neurohormones.

T/F Hormonal changes during puberty and pregnancy are forms of endocrine disruption.

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Textbook Question

Compare and contrast the structure and function of the anterior and posterior pituitary glands.