0
holesterol droplet sends cholesterol to mitochondrial matrix. Special transport molecules in the mitochondrial membrane [ called sterol carrier protein 2 (SCP-2) and steroidogenic acute regulator, (StAR)] facilitate movement across to the inner membrane. This would be like the volley-ball net having a couple of carriers or capturing agents that would send the ball across the net much faster, once you got close enough.Enzymes in the mitochondrial inner membrane cleave the side chain and form pregnenolone, a precursor for most other steroids. Then they send the pregnenolone back across the membrane (volleyball net) to the smooth endoplasmic reticulum (SER).The SER enzymes then adds more side chains, making modifications unique to the particular cells in question. The molecules may then be sent back to the mitochondria for final modification after which they leave and are secreted into the blood stream.Each cell type expresses unique sets of enzymes in the SER and mitochondria to allow it to stop at a certain point in the pathway and thus produce only that steroid. This pathway can be regulated by specific regulators for each of the steroid hormone producing cells. The regulators may stimulate the production of the enzymes as well as the production and actions of the proteins that facilitate movement across the mitochondrial membranes (volleyball net). More enzymes + more transport proteins at the volleyball net= higher levels of steroid hormones. The following electron micrograph shows the close relationship between mitochondria and the SER.http://www.cytochemistry.net/Endocrine_System/adrenal.htm#organelles
The endoplasmic reticulum, specifically the smooth endoplasmic reticulum, is responsible for synthesizing hormones and steroids in a cell. It contains enzymes involved in the synthesis of these molecules.
Sex hormones as well as all steroid hormones are made from cholesterol. Cholesterol is absorbed from food and is made in the liver. To create a steroid hormone a molecule of cholesterol is modified by enzymes within the smooth endoplasmic reticulum.
Hope that helps.
the smooth endoplasmic reticulum is responsible for making steroids
the smooth endoplasmic retuculum (smooth ER) produces hormones like steriods and sex hormones.
The biosynthesis of plant hormones within plant tissues is often diffuse and not always localized
Add your answer:
Earn +20 pts
What lipids does the smooth endoplasmic reticulum make?
The smooth endoplasmic reticulum makes lipids such as phospholipids, cholesterol, and steroid hormones. It is involved in lipid metabolism, synthesis, and detoxification processes in the cell.
What steroid that makes up part of the cell membranes?
Cholesterol is a steroid that plays a key role in the structure and function of cell membranes. It helps maintain membrane fluidity and stability, and is also a precursor for the synthesis of other important molecules such as steroid hormones.
Which part of cell makes the cell firm by taking in water?
The large vacuole.
What part of a plant cell makes chlorophyll?
Chloroplasts
What makes up part of the Cell's membranes?
The main 'component' of the Cell's membranes are fatty acids, also known as lipids.
What part of the cell makes and transports lipids and carbohydrates?
The Cell Membrane is the part of the cell that makes lipids and carbohydrates. It transports these parts, as well.
What cell part receives nerve impulses and hormones from other?
receptor molecules on cell membranes receptor molecules on cell membranes
What lipids does the smooth endoplasmic reticulum make?
The smooth endoplasmic reticulum makes lipids such as phospholipids, cholesterol, and steroid hormones. It is involved in lipid metabolism, synthesis, and detoxification processes in the cell.
What part of a cell makes nutrients?
The Cell Membrane
What cell part makes up greatest part of a plant cell?
vacoule
What cell part makes up the greatest part of a plant cell?
The central vacuole in the plant cell.
What part of the cell makes cell membranes?
Outer covering .
What are anabolic steroids and why do athletes use them?
An anabolic steroid is any of a group of synthetic steroid hormones used to stimulate muscle and bone growth. Anabolic steroids, or anabolic-androgenic steroids are a class of steroid hormones related to the hormone testosterone. which results in the buildup of cellular tissue especially in muscle.
What cell part makes up the greatest part of your model?
In a plant cell it would be the vacuole.
What cell makes protein?
Ribosomes
What part of the plant cell makes the cell sturdy and rigid?
The cell wall of plant cells is the part which gives the cell sturdiness and rigidity.
What steroid that makes up part of the cell membranes?
Cholesterol is a steroid that plays a key role in the structure and function of cell membranes. It helps maintain membrane fluidity and stability, and is also a precursor for the synthesis of other important molecules such as steroid hormones.
