Asked Nov 4, 2019
In their mechanism of action, a difference between steroid and nonsteroid hormones is that __________.
nonsteroid hormones bind to DNA
steroid hormones enter the nucleus of the target cell, and nonsteroid hormones do not
nonsteroid hormones cross the plasma membrane more readily than do steroid hormones
steroid hormones use a signal transduction pathway

Expert Answer

Step 1

Estrogen, testosterone, and cortisol are examples of steroid hormones. It is fat-soluble molecules derived from cholesterol. It acts on cells by passing through the cell membrane and enter the nucleus to bind DNA for initiating gene transcription.

Step 2

Steroid hormones cause changes within a cell by passing through the cell membrane of the target cell. Steroid hormones can do this because they are fat-soluble but non-steroid are not fat-soluble so they can’t.

The cell membrane is composed of a phospholipid bilayer which prevents fat insoluble molecules to diffuse into the cell. When steroid molecules enter into the cell it binds with a specific receptor. The receptor bounds to steroid hormone it travels into the nucleus and binds to another specific receptor on the chromatin. When it'...

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Endocrinology and Reproductive Biology

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