What is the main structure of the endoplasmic reticulum?
The general structure of the endoplasmic reticulum is a network of membranes called cisternae. These sac-like structures are held together by the cytoskeleton. The phospholipid membrane encloses the cisternal space (or lumen), which is continuous with the perinuclear space but separate from the cytosol.
What is the morphology of endoplasmic reticulum?
The endoplasmic reticulum is of a variable morphology, and each kind of cell has a characteristic ER. The ER can be loosely organized or its membranes can be tightly packed in the cytoplasm. Furthermore, the membranes can be either rough or smooth.
What are the three forms of endoplasmic reticulum?
Endoplasmic reticulum can exist in three forms (Fig. 8.31) — cisternae, vesicles and tubules.
What are the characteristics of endoplasmic reticulum?
The characteristics of endoplasmic reticulum is as follows: It is an organelle that can be found in the eukaryotic cells. These organelles form an interconnected network of flattened, sacs or tube like structures called as cisternae. The endoplasmic reticulum helps to form a skeletal framework.
What does the endoplasmic reticulum look like?
The endoplasmic reticulum looks like a system with membranes that form cavities, flat cisterns and non-lamellar, round structures.
What are diseases caused by endoplasmic reticulum?
Endoplasmic reticulum (ER) dysfunction might have an important part to play in a range of neurological disorders, including cerebral ischaemia, sleep apnoea, Alzheimer’s disease , multiple sclerosis, amyotrophic lateral sclerosis, the prion diseases , and familial encephalopathy with neuroserpin inclusion bodies.
Is the endoplasmic reticulum an animal or plant or both?
Endoplasmic reticulum is an organelle found in both eukaryotic animal and plant cells. It often appears as two interconnected sub-compartments, namely rough ER and smooth ER. Both types consist of membrane enclosed, interconnected flattened tubes.
Is endoplasmic reticulum always attached to nuclear membrane?
Yes, the endoplasmic reticulum is always attached to the nuclear membrane. ER is a part of the cytoplasmic vesicular system which also consists of nuclear envelope, lysosomes, endosomes and Golgi complex. ER is a continuous system, connected on one side to nuclear envelope and on the other side to the cell membrane.