Question

Which of the following is true about lipophilic hormones? a. They are freely soluble in the blood. d. They require a transport protein in the bloodstream. c. They cannot enter their target cells. d. They are rapidly deactivated after binding to their receptors.

Name: Problem 1, Chapter 35: Understanding Biology
Uploaded: 2021-09-30T16:23:06-08:00
Duration: 1 min 31 s
Channel: Joanna Quigley
Description: Which of the following is true about lipophilic hormones? a. They are freely soluble in the blood. d. They require a transport protein in the bloodstream. c. They cannot enter their target cells. d. They are rapidly deactivated after binding to their receptors.

   Which of the following is true about lipophilic hormones?
a. They are freely soluble in the blood.
d. They require a transport protein in the bloodstream.
c. They cannot enter their target cells.
d. They are rapidly deactivated after binding to their receptors.

Understanding Biology

Kenneth A. Mason,… 2nd Edition

Chapter 35, Problem 1

Instant Answer

Solved by Expert Joanna Quigley

09/30/2021

Step 1

Lipophilic hormones are lipid-soluble, meaning they can easily pass through the lipid bilayer of cell membranes. However, they are not soluble in water or blood, which is primarily water-based. Show more…

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Which of the following is true about lipophilic hormones? a. They are freely soluble in the blood. d. They require a transport protein in the bloodstream. c. They cannot enter their target cells. d. They are rapidly deactivated after binding to their receptors.

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Key Concepts

Cell Membrane Permeability

The ability of lipophilic hormones to easily pass through cell membranes is a key aspect of their mechanism of action. Their lipid solubility enables them to cross the cell membrane and bind to receptors inside the cell, typically in the nucleus, which differentiates them from hydrophilic hormones that act on cell surface receptors.

Lipophilic Hormones

Lipophilic hormones are a type of hormone that are soluble in lipids, meaning they can generally cross the lipid bilayer of cell membranes. This property allows them to interact with intracellular receptors and affect gene transcription and long-term cellular functions.

Transport Proteins

Because lipophilic hormones are not readily soluble in water, they cannot circulate freely in the aqueous environment of blood plasma. They require specific carrier or transport proteins to help them travel through the bloodstream and reach their target tissues.

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