@@dhonidhoni3763 Hi, Dhoni! Crazy to think but these videos can take up to 40-50 hours (or more) to complete! As a teacher myself, I'm always trying to find the time and finances to set aside to make these. But if you or anyone would be interested in supporting the channel to help me create and upload more videos, you can visit: www.patreon.com/physioflip
This is the best explanation available for these topics! Searched up all over RU-vid but could not understand other explanations. Thank you so much for this! Truly the best!
As I am studying for the MCAT, I am looking for videos that are straight to the point and your video did just that and more! Thank you. I will be looking at your other videos.
Because by osmosis, water always flows to regions with higher osmolarity or solute concentration, and since small particles can move freely in and out of capillaries , then their concentration is almost the same on both sides ,so do not contribute to the colloid osmotic pressure.
@@mohammedhosam1935 Nice, Mohammed! That is perfect. Only particles that are restricted to a particular compartment (like proteins that are stuck in the blood vessels) contribute to the difference in concentration and the osmotic pressure.
@@physioflip Not sure if you will read this comment a year later, but I want to clarify something. Doesn't water follow the sodium due to osmosis? I guess I am questioning your comment that sodium does not contribute to osmotic pressure when osmosis is when water moves from high concentration of water to a low concentration of water but it also moves from low concentration of solute to a high concentration of solute and the sodium solute is definitely contributed to water.
@@taliafreda4820 Thanks for the question! You are correct--water does follow the higher concentration of solute! However, one important thing to consider: because sodium ions are small, they freely pass between the bloodstream and the extracellular fluid. They move in and out of the blood freely until their concentration equalizes. So, sodium concentration in the blood is the same as the sodium concentration in the extracellular fluid. So, these ions do not contribute to the movement of water into or out of the blood as the ions are equally concentrated inside vs. outside the blood.
Hi Sajid! Thank you for the kind words! If you'd be interested in supporting the channel to help me upload more videos, you can visit: www.patreon.com/physioflip
But osmotic pressure is the amount of pressure which need to stop the osmosis, if osmosis will not be happen then how simple diffusion of water can be happen, and how water can be entere inside the capillaries , then how can we say that water enters inside the capillaries because of osmotic pressure ?
You’re absolutely correct! Osmotic pressure is defined as the pressure required to prevent osmosis from occurring (btw: I talk about that more in this video: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Xxj8EaDPJxw.htmlm34s). But in reality osmotic pressure is really just a measure of how “strongly” water wants to move by osmosis. If it takes a lot of pressure to prevent osmosis, water really “wanted” to move. If it doesn’t take that much pressure to prevent osmosis, there likely wasn’t a big difference in particle concentration and water didn’t really “want” to move. So, you can think of osmotic pressure as a way to measure how big of a concentration difference there is and how badly water “wants” to move by osmosis to reach equilibrium. In the body we don’t have ways to stop osmosis. Water is free to move. So when talking about osmosis within the body, osmotic pressure is just used to describe how strongly water wants to move from a low concentration of particles to a higher concentration of particles.
Hi Pooja! While adding Na+/Cl- to your diet can lead to a higher concentration of Na+/Cl-, these ions easily move out of the capillaries and into the interstitial fluid. So, they don't contribute to the colloid osmotic pressure, which is driven by the difference in concentrations between the blood and the interstitial space. However, the higher concentraion in the interstitial space/plasma can lead to increased fluid leaving cells. This can caused increased retention of fluid in the interstitial space (swelling) and in the blood, driving up blood pressure. So, while ions do not contribute to the balance of hydrostatic/oncotic pressure between the ECF compartments (plasma and interstitial space), it can lead to fluid shifts between the ECF and ICF compartments.
Make more videos, have you seen ninja nerd ? He is really good, you explain this in a shorter video in the simplest way. Keep up. I wish you have way more videos.
This was really helpful.... please I can't find the video on the last things you said, which was about oedema of the leg when you sit for too long. Please how can I get the video
Why sodium is not responsible for reabsorbing fluid at venus end ..... Sodium ha high osmolality 270mosm but proteins has 2mosm then how com protein responsible for oamotic pressure
Thank you for this simple explanation of hydrostatic and osmotic pressure. I was getting myself confused by just reading the textbook. I understand both processes a lot better now!
osmotic pressure for understanding purposes, we can say solution which has higher solute has lower water conc as compared to sol. with no solute/less solute. since by diffusion water moves from higher conc to lower conc, it tends to move from pure water into solution with solute. there you have it. i just read it again and its basically osmosis, so that means we can also relate osmotic pressure to osmosis. i sound dumb lol nevermind. adios
So without gravity we wouldn't have had hydrostatic pressure, so our capillaries would have been filled with too much fluid since only the osmotic pressure would have been relevant?
Hi there! Thanks for the question! Technically, "hydrostatic pressure" is derived from the force of gravity. However, in the body and physiology, the term "hydrostatic pressure" is used more loosely to refer to any source of fluid pressure that is not "osmotic/oncotic pressure". For example, hydrostatic pressure can be adjusted in the body by changing blood volume, cardiac output, altering blood vessel diameter, etc. While gravity can certainly alter hydrostatic pressure (making it higher in the lower extremities for example when standing) it's not the only factor that contributes. Interesting sidenote: to prove that hydrostatic pressure can still drive fluid out of the blood even in the absence of gravity, you can try looking up "puffy space syndrome in astronauts".
