All hormones

Question

All hormones

BlackTom AI · Accepted Answer

The question presents five statements about all hormones and asks us to evaluate them.
Option 1: 'Are secreted by endocrine glands through ducts into the blood' — This is inaccurate because most endocrine glands are ductless and release hormones directly into the bloodstream. The phrase 'through ducts' is characteristic of exocrine secretions, not typical endocrine hormone release. Therefore this option is incorrect.
Option 2: 'Are regulated by the hypothalamus' — While the hypothalamus exerts major regulatory control over many hormones (via releasing and inhibitory hormones), not all hormones are regulated by the hypothalamus. Some hormones are regulated by other organs, feedback loops, or stimuli independent of the hypothalamus. Thus this statement is not universally true for all hormones and is better described as true for a subset rather than all.
Option 3: 'Initiate synthesis of new proteins' — Hormones can influence gene expression and protein synthesis in target cells, but they do not universally initiate the synthesis of new proteins. Some hormones may affect enzyme activity, second messenger cascades, or other processes without altering protein synthesis, while others do influence synthesis. This blanket claim is thus oversimplified and not universally true.
Option 4: 'Are produced in a gland and target cells in different tissues' — This statement asserts that hormones are produced by glands and act on target cells in different tissues, which captures the classic endocrine signaling model: endocrine glands secrete hormones into the bloodstream to reach distant targets. While there are exceptions (such as autocrine or paracrine signaling, or hormones acting on nearby tissues), the core concept described here aligns with the general understanding of hormonal action. Therefore this option is presented as the correct one in the provided data, and its premise is largely accurate for the intended definition of hormones, distinguishing endocrine signaling from direct exocrine action.
In summary, each incorrect option either misstates the secretion pathway, overgeneralizes regulation, or oversimplifies mechanism, while the selected option accurately captures the central idea of hormones being produced by glands and acting on distant target tissues, despite some exceptions in physiology.

ANSC20001_2025_SM1 Week 9: Endocrine System (Example MCQs)

All hormones

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ANSC20001_2025_SM1 Week 9: Endocrine System (Example MCQs)

All hormones

查看解析

登录即可查看完整答案

类似问题

The _____________ is referred to as the master gland of the body because it secretes multiple hormones that influence multiple body functions.

The various hormones of the endocrine system work in isolation.

Cortisol is released by what structure?

The endocrine system uses ____ signals called ___ to communicate to convey information to other regions of the body. These signals travel through ___ and the response time is_____.[Fill in the blank]

The endocrine system uses ____ signals called ___ to communicate to convey information to other regions of the body. These signals travel through ___ and the response time is_____.[Fill in the blank]

Which of the combinations below is INCORRECT?[Fill in the blank]

Which of the combinations below is INCORRECT?[Fill in the blank]

Glucagon is produced by the adrenal cortex.

更多留学生实用工具

希望你的学习变得更简单

The endocrine system uses __ signals called _ to communicate to convey information to other regions of the body. These signals travel through _ and the response time is___.[Fill in the blank]

The endocrine system uses __ signals called _ to communicate to convey information to other regions of the body. These signals travel through _ and the response time is___.[Fill in the blank]