Endoplasmic Reticulum

Endoplasmic Reticulum

The endoplasmic reticulum (ER) is a complex, membrane-bound organelle found in eukaryotic cells, which include those of animals, plants, and fungi. It plays a crucial role in various cellular processes, particularly in the synthesis, folding, modification, and transport of proteins and lipids.

There are two main types of endoplasmic reticulum:
1. Rough Endoplasmic Reticulum (RER):
The rough ER appears "rough" under a microscope due to the presence of ribosomes attached to its membrane surface. Ribosomes are responsible for protein synthesis. On the rough ER, ribosomes synthesize proteins that are either secreted from the cell, incorporated into cell membranes, or transported to other organelles like the lysosomes or vacuoles. This organelle is heavily involved in the synthesis of membrane proteins and proteins destined for export from the cell.

2. Smooth Endoplasmic Reticulum (SER):
The smooth ER lacks ribosomes on its surface, giving it a smooth appearance. The smooth ER is involved in various metabolic processes, including lipid synthesis, carbohydrate metabolism, detoxification of drugs and toxins, and calcium ion storage and release. In some specialized cells, such as muscle cells, the smooth ER plays a crucial role in calcium ion regulation for muscle contraction.

Overall, the endoplasmic reticulum is an essential organelle for maintaining cell homeostasis and ensuring that proteins and lipids are properly synthesized, modified, and distributed within the cell. It works in coordination with other cellular components, such as the Golgi apparatus and vesicles, to transport and modify molecules as needed for various cellular functions.

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[no.internet]

I remember when I was in high school this channel is the reason why I’m employed today Thank u Manocha cademy 🙏🙏🙏

[aishwaryaupadhye]

Answer for the question:
Red blood cells (RBC) lack endoplasmic reticulum as the main function of RBCs is to exchange gases between lungs and the body. This requires the RBCs to be a little flexible to move through various parts of the body. If they have ER (which many mature RBCs do not have) the ER will use some of the gas carried by the RBC for synthesis of lipids and proteins. Hence, the lack of ER in RBCs is beneficial for gas exchange which is their main function.
Thank you mam 🙏😊

[TP-tgcc]

Thank you so much !! You are very lovely and this really helped me understand the ER along with other things in depth, whenever the teachers glossed over it in past classes. I love your videos and I have been watching them a lot recently! Thank you for keeping them up!

[solar]

Red blood cells are able to carry more oxygen when they do not contain rough endoplasmic reticulum.

[rohitshastry]

Really nice video ma'am, I liked the cubical example! I am Missing your teaching 🙂

[MoneniShafuda]

Well based on my research, RBCs do not have ER because they do not synthesize proteins and so they contain more hemoglobin to carry more oxygen

[CorneliusDan]

Question number 1: it doesn't have because, it reduces the surface to volume ratio which allow more RBC to accumulate . Question 2 I think 🤔 is YES

[rohitshastry]

If RBC's had ERs their surface area for absorption would be less, hence they are absent. If they were present they would decrease the functioning of the RBC.(PS I'm not sure If this is right 👀)

[Sanjukta]

Magnificient video.Thank you so much madam.

[sriritwikshastry]

Very well and Easily Explained! Loved it mam!
Loved the visuals in this video! Excellent Editing! Hope we get many of these kind of Biology Videos!! :)

Also, Congo for 1.1M Subscribers

[Dasarigangajamuna]

Thank u mam😊
I understood very well and i can write test easily now✨😊😊❣️

[poornimabh]

Sir please upload anatomy of flowering plants

[Ryugaa]

why proteins produced by ribosomes need to go into the endoplasmic reticulum

[anjusoni]

Thanku So Much ma'am for this.... I was waiting for ER....

[UruchiKumari]

Q1 ans because if RBCs are donot have nucleus

[sriritwikshastry]

To Answer the questions asked at the end of the video:-

Q. Why red blood cells do not have endoplasmic reticulum?
Answer:- Red blood cells lack endoplasmic reticulum because they get rid of most organelles, including the endoplasmic reticulum, to make more room for carrying oxygen.

Q. Would Endoplasmic Reticulum be useful for RBCs
Answer:- Endoplasmic reticulum wouldn't help red blood cells because they're all about carrying oxygen and don't need the extra baggage of organelles like the endoplasmic reticulum, which is responsible for making proteins and lipids.