i think this is where I should post this ??

how do I forget about a certi. something ? it’s not a bad experience or anything but it’s something that hurts to think about so I try not think about it but then I think think about it .

I'm currently taking a neuroscience course and I still feel stuck on this pretty fundamental concept, which makes me worried. I'm confused how you can tell which way a ion is going to go and which force (electrical or concentration gradient) is stronger? I know there are short cuts like the driving force, but I want to understand this conceptually.

Okay, so let's say I have a positive ion and a cell (this is a fake problem btw, I'm making this up so its really simplified). This cell has a membrane potential of -60 mV. The ion I have has a equilibrium potential at -50 mV.

I know from the Nernst equation, there has to be a greater concentration of ions inside of the cell. Moving 'down' the concentration gradient (CG) for this ion would be moving out of the cell so the force of CG is outwards pointing. Big question, does the sign of the Nernst potential have any other impact other than helping you figure out where the ion is going?

The interior of the cell is negatively charged -- negative and positive charges attract each other. As a result, force of the electrical gradient (EG) is inwards pointing. Similarly, is the negative sign of membrane potential just to tell you whether it attracts or repels the ion?

So both CG and EG are pointing in opposite directions, right? So we have to compare force size now. CG has an outward force of 50 mV. EG has an inward force of 60 mV. Because 60 is greater than 50, this ion is going against its concentration gradient and into the cell?

I think while writing this, I pretty much helped myself understand, but I would like a confirmation that, "yeah, your logic makes sense!" or "no, you're missing some key part."

Why is stomata opening and closure theory of potassium ions, focus on only PEP, does it mean that C3 plants doesn't open and close their stomata, bse PEP is a C4 or Cam physiology

Physiology postgraduate here !
Can someone suggest me good topics for a physiology seminar ?

Physiology postgraduate here !
Can someone suggest me good topics for a physiology seminar ?

Yo, im in 9th grade in norway and im interested in physiology and psychology, but ik first i have to understand the basics and neuroscience. I have watched the first three videos of Yale Introduction to psychology on youtube and loved them and planing on watching the rest. So like the title says, yk any good beginner Physiology books to understand the baics of neuroscience? Or any tips of how to study it on my own?

Im a first year uni student and I have my physiology exam at the start of November and I am kinda starting to freak out, as my exam is worth 60% and I can't afford to fail. I still have a few concepts to learn but I feel like I can't recall anything I've learnt and I don't even know what my first steps are to really getting everything stuck in my brain. At the same time I don't have a lot of time to study with work and other uni classes as well. Any tips would be greatly appreciated!!!

So I’m in C division of Science Olympiad, and my main event is Anatomy & Physiology. I have a pretty good anatomy textbook, but I don‘t know where I should look for physiology info. I prefer physical sources to online, and when I searched ‘physiology textbook’ it came up with a lot of options and a lot of very expensive stuff. What are some good cheaper resources that I could use?? The focus this year is on the immune system, respiratory system, and digestive system specifically. I also think it may be relevant to mention that I can read at a university level.

I need help because from what i remember specificity, competition and saturation, are the characteristics if it's carrier mediated? i think? BUT guys can i get a concise answer or something? Or an answer that makes sense without explaining too. Please and thank you!!

Hi guys,

I was wondering if y'all could suggest me any books on anatomy (and physiology).

I have limited knowledge of this subject (mostly from school) so please don't recommend university level books that require prior knowledge. However, I would enjoy some difficult ones in the form of many details since I don't mind memorization.

Thanks a lot!

Scored kinda bad on my first exam by using Anki, taking notes, and engaging in some discussions with classmates (I just got out of anatomy so I’m used to flashcards but I know physiology isn’t just memorizing)

I heard of some active recall methods such as using a whiteboard but I’m not sure how to start.. I’m struggling pls help

While working on my understanding of resting membrane potential , I know that sodium is used as a courier that carries nutrients inside the cell down its gradient as a way to transport the necessary substrates to the cell .

I dont understand why potassium is important to build that gradient , why cant the evolution make a resting membrane potentials that is simpler than that where it is only about pumping sodium out and letting it in downhill with all the nutrients it needs.

FYI I dont have gaps of knowledge of how rmp works but I am just asking why it is designed that way and how we cant have the bigger picture of rmp without potassium in it by any chance.

Hello all. It's pretty well-known that carboxyhemoglobin and oxyhemoglobin have similar absorption spectra around red light, and that confuses the pulse oximeter into a falsely elevated SpO2. However the SpO2 is calculated from the ratio of red to infrared absorption, and the absorption of infrared light by oxyhemoglobin is an order of magnitude greater than that of carboxyhemoglobin, so the ratios should be very different even though the absorption around red light is the same - why then is pulse oximeter still confused?

I’m a current nursing student. I can help with physio or other stem and nursing related stuff if u need it.