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Why some steroid hormones do not require a membrane receptor?

Answer

Because they are lipid soluble and therefore are readily diffusable across the cell membrane. Their receptors are found within the cytoplasm or nucleus.
Q&A Related to "Why some steroid hormones do not require a membrane..."
Steroid hormones pass through the target cell and into the nucleus where they bind to a receptor protein. Here they activate certain genes.
http://answers.yahoo.com/question/index?qid=200707...
Because steroids are a lipid molecule and can flow freely through the lipid bilayer membrane protecting the cell. so it is unnecessary for those receptors to be on the membrane surface
http://answers.yahoo.com/question/index?qid=200902...
The answer is B. Is it just me or are there like 3 people taking the same test?
http://answers.yahoo.com/question/index?qid=200902...
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