Another interesting thing about smooth muscle is that different smooth muscle cells may react differently to the same neurotransmitter or hormone. Example: In the lungs smooth muscle cells relax in response to epinephrine while smooth muscle in many blood vessels contract in response to the same hormone. This is because smooth muscle cells can express different receptors for the same hormone (for more look up alpha and beta adrenergic receptors). I hope this helps you!

Hi doc ! Thank you for this lectures . I am still watching your 5years old videos . Thanks a lot

OMG! Thank you soooo much for this video, it really helped me with my coursework. You taught me more in 11 minutes than my teacher does in 90minutes! Thanks Doc! :)

You've done me good, I have just learned the basics, now it will be stuck in my head thanks to you old sport.

This guy is amazing. Thanks doc

doc u helping humanity infact and i m sure god wil reward u for ur this help and m prayng god solve ur pro in every step of life

Thankyou for this masterpiece Sir

ahh, thank you so much this helped a lot, now I feel like I can teach them haha.

Thank you!

When it comes to smooth muscle things work a bit differently. Smooth muscle also contracts when it is stretched, so smooth muscle doesn't completely shut down even if it has completely lost innervation.

Control of smooth muscle is complicated :) Smooth muscle cells can react to mechanical changes (they tend to contract when stretched due to mechanically activated channels), by hormones (smooth muscle cells wrapped around bronchi relax in response to epinephrine so that bronchi dilate), other smooth muscle cells contract in response to direct contact with other cells (smooth muscle cells in the gut contract when autorhythmic cells undergo depolarization-- helps create waves of contraction).

Thank you. Keep up. Anatomy is beautiful.... Studying what God has made is a privledge.

amazing teacher ! :D

Thanku soo much !!!

THANK YOU!!!!!!!!

great job

Really good

Epithelial tissues usually have more extracellular matrix than the other tissues. There is more, but that should get you started :) You might take a look at the Tissues(Biology) page on wikipedia too.

Thank you, I have a lab quiz tomorrow. I have been studying, but since it is summer we are moving at a really fast pace and it helps to hear it from another point of view. The smooth muscle description clicked in my head when you said that it's smooth and there was no striation. When it was described to me as non striated, it didn't click in my brain for some reason. Anyways I appreciate the help. Keep posting...

THANK YOU, this is such a useful summary! :)

Thank you Sir for your short time easily graspable class 👍

Love your videos.

You are an excellent professor. I view your lectures before reading a chapter (this way I get more out of reading). There was one question I need for you to clarify please: which smooth muscles require innervation? Can you list some examples of that as well?

Thank you this was very informative and a awesome visual study guide

Take a look at "muscle anatomy at the molecular level." Basically the striations in muscle and in collagen are due to repeating arrangements of molecules. In skeletal and cardiac muscle it is the arrangement of actin and myosin within the sarcomeres of myofibrils. This will make sense to you when you learn the molecular structure of the sarcomere. In collagen the striations are much smaller-- you can't really see them with a light microscope (requires electron microscopy I think).

Thank you for this video!!

Thank You for sharing your knowledge

hi, great vid doctor, and the inervation part was especially interesting. when a lizard's tail breaks off is the wiggling because of innervation or just regular nerve msgs that had passed through & are manifesting ?

Thank you sooooo much!!!!!!!

amazing way to learn

sir u really helping us thank u so much i wish u wore our teacher

this chap of muscle was qiute tagh to me but u made it really easy god bless u ameen

Sounds like you are on top of it :) How about talking about embryology? What primary tissues of the embryo give rise to each tissue type?

Hi Dr Rem, can i ask why muscles are striated and why collagen is striated? thx

🤗

Why after animal is dead some skeletal muscles are still contacting. (have seen that is the abattoir. )

god bless you! youre WAY better than my anatomy teacher and way cuter

very informative

Sir this is anatomy or not,,,🤗

In a comma all conscious control of muscles stop, but autonomic control is usually still there. So no, skeletal muscle and smooth muscle does not shut down. Even in a deep coma the nervous system is still functioning to control autonomic functions (like moving food along the digestive tract). Skeletal muscle reflexes are also still functioning. The only time skeletal muscles are shut down completely is when the part of the nervous system that was innervating them stops.

Here is a start. Epithelial tissues create membranes (like the skin and mucous membranes) and glands, while muscle tissue creates movement, nervous tissue sends and receives signals and performs integration (data processing), connective tissues fill spaces, store energy, support the body, and circulate nutrients. Nervous and muscle tissues are irritable tissues, they change their membrane charge quickly in response to stimulation.

sir,if both skeletol and cardiac muscle are striated then why on saying striated muscle we automatically assume it to be skeletol not cardiac

There’s a question on my test and it’s what are two similarities for cardiac and skeletal muscles? How can I answer this?

which kind of muscle tongue have sir

u are father of physiology

This is too basic for the physiology course in med school! :(

Thank you for this video!!

Thank you!