Your body is a complicated machine, so you may be surprised to learn that important biological molecules that make up living things fall into only four main classes: carbohydrates, lipids, proteins, and nucleic acids.<span>Your cells are surrounded by a very important type of lipid, calledphospholipids. Phospholipids consist of a hydrophilic (or 'water loving') head and a hydrophobic (or 'water fearing') tail. Phospholipids like to line up and arrange themselves into two parallel layers, called a phospholipid bilayer. This layer makes up your cell membranes and is critical to a cell's ability to function.</span><span>
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The receptors for steroid hormones are reside inside the cell instead of the membrane surface, like most other signal receptors. So, Steroid hormones are lipid soluble. Steroids gain access to their receptors because they can readily diffuse through the lipid bilayer of the cell membrane.
Steroids are man-made hormones which are lipid soluble and are normally produced by our adrenal glands, which are two small glands always found above the kidneys. When steroids are taken in higher doses than the amount your body normally produces and that steroids reduce redness and swelling.
Therefore, steroid harmone signalling is a lipid-soluble signalling which can be transmit through the bloodstream from an endocrine gland bound by a steroid binding protein (SBP).
Learn more about steroid hormone signalling here
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Aristotle is the father of biology.
"resting membrane potential"
Resting potential occurs when membrane potential isn't altered by action potentials. When a membrane is polarised and there's no sinaptic potentials or any other active change of the membrane potential we are before a resting membrane potential.
