Anatomy, Physiology and Neuroscience

Trace (describe) the pathway of a carbon dioxide gas molecule in the blood from the inferior vena cava until it leaves the bloodstream. Also, name all structure (vessels, heart chambers, and others) passed through en route. I need help with this please!!!

Does anyone know what the source of blood in the hepatic portal system is?

I know that most arteries in the adult body carry oxygen-rich blood, and the veins carry oxygen-depleted, carbon dioxide-rich blood. But how does differ in the pulmonary arteries and veins?

I just finished watching the movie "In Its Image". My brain hurts.. How plausible to you guys think it is that we will have TRULY thinking machines based on this concept? It sounds mindboggling but beyond that, Im a bit surprised not to have heard of this concept before. Maybe it's just me... anyone heard of this? btw.. the entire thing kinda smells weird... the "lots of products were invented by creativity machines but i'm obliged by contract to not tell you which" is.. uhh.. suspicious, to say the least. Is this valid!? ~moo

I need some input on a physio topic for a presentation i have to do in class. I really like cardio but don't know it well enough to present and it's probably way too complicated anyways (this is not a hardcore premed class). I was thinking about the respiratory system? But I haven't read too much about it, or dependency on oxygen? I need something not too complicated. I prefer simple, but physio isn't all that simple. haha. hmmm. I need help. Thanks!

A couple of years ago, I read an article in the New York Times about what's being called the "second brain", the enteric system. Apparently, the enteric brain is involved in the process of digestion. It is a system of neurons and what-not that utilize neurotransmitters like dopamine and seratonin (like in the head brain) in the regulation of the digestive process. It's responsible for peristalis, and enzymes and all that. Here's the Wikipedia link http://en.wikipedia.org/wiki/Enteric_nervous_system It got me wondering about brains and what is a brain and what brain came first etc. It would seem to me, that in terms of evolution, the digestive brain would d…

hi ok so like this is my second week of boarding school so im pretty new here. iv been in ballet this is my 5th year so my parents are like relly relly serious about it because they want me to get a scolorship. when i was at home my mom always made my food and my daddy always made sure i dint eat alot or like bad stuff... my brother is 17 and in restling so there relly big on us staying thin.. and now im here and like i hav practice every morning and i was 45 pounds at home and now im 47 lol so like im relly scared cuz they let me eat w.e i want.. there is 2 lines.. one has gross stuf... and im super picky... like i dont eat onions, cellery, oliv…

Hello. As our lives are highly ruled by 24 hour periods, meals at mostly regular intervals and sitting on the throne is also periodical, the intestinal transit should be a multiple of 24 hours; if am thinking well. How long does it take a 'normal' routine meal to evacuate ? Miguel

ok, this is probably a Strange question but I am curious about it. Imagine there is someone in a long term Coma, not life support or anything like that just a coma. Obviously they get drip fed during this time so they don`t starve. but what happens to the GI tract? we know that Muscles will atrophy over this time, but how about our Inside workings for Food?

I thought I would put this topic in this section given that it involves a great deal of neurology. Its something I've been thinking about actually while listening to electronica (e.g. techno, ambiance, etc. NOT to be confused with hip-pop crap...) , and that is just how much of an influence does music have on the human brain. Also, did we evolve knowing what music is? There is really a lot of stuff to cover with this subject, but I'll get to the main points. For one, music has been known to influence emotional states, and in some cases even induce them. Also, we humans just seem to naturally be attracted to certain frequencies and sounds. For example, when I hear…

i don't know why, but i get the feeling that the brain can live longer than other organs, and we die due to those other systems failing. maybe i'm wrong tho. my question is, assuming that all other parts of our body are functioning correctly indefinitely (immortal), how long will a healthy brain last before it dies of age (not disease)?

Jeff Hawkins, creator of the Palm Pilot and founder of the Redwood Neuroscience Institute presents an hour long discussion on how the human neocortex and thalamocortical loops work: http://video.google.com/videoplay?docid=-2500845581503718756 He's also implemented this in software (see my other thread)

I just watched a mini-documentary on 'medical myths' like the 'fact' that we only use 10% of our brain. They say that is totally untrue and we use 100% of our brain. CAT scans certainly show a lot of activity...

Does anyone know the neurological reason for absense epilepsy? All I can find out on the net is that it's classified as generalised 3Hz waves on an EEG - but what exactly happens in the brain to cause this?

How many of you have ever been yelled at by a parent for sleeping, instead of working around the house, studying, or being active? I'm assuming most of the people reading this. Well, here's an excuse to use next time this happens: "research shows that morning sleep and afternoon naps aid mental and physical learning." In studies performed at Harvard, scientists investigated the role of sleep in perceptual learning by training subjects to report the direction of colored bars superimposed on other lines on a computer screen. Their performance progressively worsened throughout the day. The subjects were then allowed to nap for 30 minutes, and the deterioration ceased;…

What are the working physical definitions of thoughts and memories? I understand that this is an area of science that is still developing, but are there basic definitions that would work to physically describe thoughts and memories? More specifically, do thoughts arise from electrical signals being passed through certain areas of the brain? If so, would memories then be some neuron characteristics that would then be changed (by the electricity) to "remember" the thought?

I know that in horses, breathing while running is coupled to the strides, so that a horse can only breath once per stride. In humans, this is decoupled, so that humans can breath as much as they want per stride, and this is often cited as some very monumental thing in human evolution. My question, if you will forgive its naive obviousness, is whether-or-not this has coupling has actually been demonstrated in quadrupedal primates or if its just a thing in striding animals like horses and carnivores and the like. Those are the only animals I've ever heard actually spoken of as having linked breathing and running.

Could someone link me to a website or something which has all kinds of anatomy charts for different bodyparts and systems that I can download and print on A4 paper without having to buy massive charts? Thanks

What is the function of the kidneys?

I keep reading that it's possible, but I don't understand how. How does fat turn into hematopoietic tissue???? I'm thinking that I'm missing something here.

How exactly does the pectoralis major help with adduction when resistance is put on the body? If you ask me, it seems like the pectoralis major would resist the weight, thus by pushing the weight upward: This would be abduction. Or am I wrong on this?

Hello people about 18 months ago I had carpel tunnel surgery on both my hands and since then the typical pins and needles symptoms have gone but now I suffer constant pain in my forearms and hands I'm an active person and if I do a normal hard days work (or even a couples of hours) the pain or discomfort drives me crazy. Does anyone know why this might be ? My doctor has no idea. Or even I anyone has heard of this type of thing I'd interested to hear that I'm not a one off, I'm not a nutter well not yet anyway ha ha. ;)

Does anyone remember/know the type of cement used in them? I would much appreciate it if you do. I'm trying to explain the procedure to someone and I can't remember for the life of me.

Buenos dias. What do our human pores secrete?

I've never really thought much about this till this morning but have you ever noticed how if you've been drinking vodka(or some other vodka based drink) the night before, that in the morning, every liquid you drink seems to taste like it has vodka in it? is there anything to explain this? i have a feeling it's psychological but maybe i'm wrong. oh and, 10 points and a cookie if you can guess what i was drinking last night.