Lipids Part 2: Steroids
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- čas přidán 1. 09. 2016
- Steroids have gotten a pretty bad rap! In reality, they're not just the big bad anabolic steroids. This class of molecules includes many vitamins as well as cholesterol. Cholesterol has also gotten a bad rap! We need cholesterol for our cell membranes to be rigid enough to stay intact, and for our bodies to build other important molecules. What I'm saying is that you should watch all of these tutorials, and don't believe everything you hear around town about molecules!
Watch the whole Biochemistry playlist: bit.ly/ProfDaveBiochem
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Having biochem exam in 6 hours.. and i have learned more from your videos than from 600 slides of presentations from our proffesor... thanks :)
How'd you fare on your exam mate?
I like your videos. I'm going to a 4 hour test without books or any other help in biochemistry Tuesday morning and I'm watching your playlist about biochemistry and it is really good 😊
i'm an IT technican i don't even know how i start to interest in biology but your channel help me alot! so thank you for educating me!
Excellent . Nicely observed. Keep them coming :)
I can't stress enough how great your vids are!
also your face at 0:08 always make me smile
keep up with this amazing work!
cheers from Brazil
it always make me think "sorry, we all gotta do this"
Prof, These videos are great. the explaination is clear. i have encouraged my students to subscribe to your channel. great work
that's great news! and thanks for encouraging them to subscribe as well as watch, that helps my channel grow!
i guess im asking the wrong place but does any of you know of a method to get back into an instagram account?
I somehow lost my account password. I love any tips you can offer me!
Thank you so much! Such easy and clear explanations.
Great video with awesome explanation!
Very Informative video!
Thank you for the lesson.
Good stuff. You should do a video on how too much cholesterol (that the body makes) causes heart disease. It'd be fascinating.
I owe you a lot Prof Dave :)
thank you teacher.keep on
Thank you professor 💕
thank you
My biochem exam is coming (hopes I get high score). And you explained it better than my prof did. HAHAHA thanks
Thanks
The structure explanations is 👍
Very great job sir as I will recommend you chanel to my students 😊
Thanks for the video... i really wanted to know what alpha and beta meant in these structures... your's is the only video which explains that... very useful👍😁
Great,thank you
Good morning
The matters which join in synthesis of cholesterol directly are?
Answer to that question from your class.
Thanks alot
God bless Professor Dave
"Let me tell you about steroids" can go two very different ways
Thanks 🙏
thank you sir
nice good to know the details
Pink John
R s configuration of cholestrol
Thankyouuuuuuuuuuu 💙
Thanks, but it's almost impossible to find steroid numbering online. Can you elaborate on how to number them when they include functional groups?
hmm i don't really recall, i know all the numbers as listed here are fixed, so i think if there are alkyl groups off of C17 or something, they just continue labeling from the next available number
There's some kind of rule about functional groups and numbering.. like.. if there's a methyl group coming off of carbon 13, between the C and D ring, you can't just call it 14..
(Looking at Cholestrane).. But then if there's a second methyl group at carbon 10, that's carbon 19.. Then you come back up and number the carbons extending from carbon 17 again. It's madness. :)
im 22 and i love the introduction lol
Uhm, in another video i heard that all the rings in steroids are just trans-fused bc this conformation is more stable than cis-fused ones.... sounds pretty plausible to me! Than on the other hand i am no expert and so i am a little confused which video is accurate :/
both conformations are possible!
Hi Professor! I do not get one thing. Usually when carbon atom has only hydrogens we do not show them in order to make formula look simpler. But why do we write these hydrogens and even show their orientation in space via wedge and dash bond in steroid molecules ? why do we only show them on carbons # 5,8,9,14?
The stereochemistry is relevant so they are often shown for clarity
@@ProfessorDaveExplains Thanks!!!
Always end up back here. Way to go algorithm....
Hi. How many carbons and hydrogens are in the steroid ring system??
well you're watching the clip, count them up!
Professor Dave Explains i know there are 17 carbons, but how do I know where the hydrogens are? Please sir I need help
Check out the first clip in my organic chemistry playlist, it explains how to interpret line notation and understand where the implied hydrogens are.
Fatty acids, triglycerides , steroids and terpenoids are all completely different in their structure so why they are classified together in one group of Lipid
i mean they dont have general structure like carbohydrates
He knows alot about the science stuff professor dave explains!🎤🎶🎶🎶🎼🎹🎻🎺🎺🎺🔬🎶🎬😜
How does cholesterol clog arteries?
Personal Training Max
www.ncbi.nlm.nih.gov/m/pubmed/1534437/
Björn Morén that’s what I know too. The video states it like it’s a fact that cholesterol clogs arteries. No reply or proof when questioned?
@@CoachStephen When you have too much LDL, that transports cholesterol to the perifery tissues the cells will not be able to intake all the cholesterol. LDL can circulate for 3 days, after which it is destroyed by scavenger cells. Those cells have limit. When exceeded they start to form plaques (with collagen). HDL can prevent this process by transporting cholesterol back to the liver. If HDL levels decrease you have a problem too.
stronger33 that’s not what all cause mortality rates prove. In fact quite the reverse. High levels of LDL are protective. In a study of over 68,000 patients those with high levels of LDL lived at least as long or longer than those with low LDL. British medical journal 2016 (BMJ, 2016)
This is amazing stuff. Now I wonder when in evolution the split happened towards sexual reproduction. Wonder if this part of chemical evolution is actually known in detail - Or at least can be reconstructed. Of course these sex hormones, essentially steroids, are just one component in the soup. Somehow there ought to be also feedback cycles that make males produce more testosterone and females more estrogen. So sex differences already on the biochemistry level must be more than just these hormone differences. (Contrary to the ideas that everything is "a spectrum". This may be my next tangent ;-)
where are the nuclei in the steroid structures.
Nuclei? Every atom has a nucleus.
the steroid nucleus professer ?
❤
👍🙏
Coooool🤓🤓🤓🤓🤓🤓
I wonder if he has the knowledge or just reading a script
I used my knowledge to write a good script.
ok averge
nice vid! you sound like a robot though
nonsense, i'm a vivacious fellow.
Do you even lift bro? jk