Examples of reticulum in the following topics:
reticulum is an organelle that is responsible for the synthesis of lipids and the modification of proteins. The endoplasmic
reticulum (ER) is a series of interconnected membranous sacs and tubules that collectively modifies proteins and synthesizes lipids. The smooth endoplasmic
reticulum (SER) is continuous with the RER but has few or no ribosomes on its cytoplasmic surface. This transmission electron micrograph shows the rough endoplasmic
reticulum and other organelles in a pancreatic cell. Describe the structure of the endoplasmic
reticulum and its role in synthesis and metabolism
The concentration of calcium within muscle cells is controlled by the sarcoplasmic
reticulum, a unique form of endoplasmic reticulum in the sarcoplasm. Muscle contraction ends when calcium ions are pumped back into the sarcoplasmic
reticulum, allowing the muscle cell to relax. The inward flow of calcium from the L-type calcium channels activates ryanodine receptors to release calcium ions from the sarcoplasmic
reticulum. Calcium remains in the sarcoplasmic
reticulum until released by a stimulus.
A neural signal is the electrical trigger for calcium release from the sarcoplasmic
reticulum into the sarcoplasm. The action potential triggers the sarcoplasmic
reticulum to release of Ca2+, which activate troponin and stimulate muscle contraction. The sarcoplasmic
reticulum is a specialized endoplasmic reticulum found in muscle cells.
Each myofibril is surrounded by the
reticulum which is closely associated with the transverse tubules. The sarcoplasmic
reticulum acts as a sink of Ca+ ions, which are
released upon signalling from the transverse tubules.
The four compartments of the stomach are called the rumen,
reticulum, omasum, and abomasum. These animals do not have a rumen, but do have an omasum, abomasum, and
reticulum. The first two stomachs, the rumen and the
reticulum, contain prokaryotes and protists that are able to digest cellulose fiber. The ruminant regurgitates cud from the
reticulum, chews it, and swallows it into a third stomach, the omasum, which removes water.
numerous membrane-bound organelles (including the endoplasmic
reticulum, Golgi apparatus, chloroplasts, and mitochondria) The endoplasmic
reticulum modifies proteins and synthesizes lipids, while the golgi apparatus is where the sorting, tagging, packaging, and distribution of lipids and proteins takes place. The nucleus stores chromatin (DNA plus proteins) in a gel-like substance called the nucleoplasm.The nucleolus is a condensed region of chromatin where ribosome synthesis occurs.The boundary of the nucleus is called the nuclear envelope.It consists of two phospholipid bilayers: an outer membrane and an inner membrane.The nuclear membrane is continuous with the endoplasmic
reticulum.Nuclear pores allow substances to enter and exit the nucleus.
When amyloplasts settle to the bottom of the gravity-sensing cells in the root or shoot, they physically contact the endoplasmic
The nuclear membrane is continuous with the endoplasmic
reticulum, while nuclear pores allow substances to enter and exit the nucleus.
Each neuron has a cell body (or soma) that contains a nucleus, smooth and rough endoplasmic
reticulum, Golgi apparatus, mitochondria, and other cellular components.
For signaling purposes, Ca2+ is stored in cytoplasmic vesicles, such as the endoplasmic
reticulum, or accessed from outside the cell.