Biology Human Anatomy and Physiology Question Please Help!?
D. Touch stimulation of this sensory receptor will open the mechanically gated ion channels, but action potentials are still not initiated because propagation of an action potential requires the opening of voltage-gated Na+ channels. Action potentials are generated by special types of voltage-gated ion channels embedded in a cell's plasma membrane. These channels are shut when the membrane potential is near the resting potential of the cell, but they rapidly begin to open if the membrane potential increases to a precisely defined threshold value. When the channels open (by detecting the depolarization in transmembrane voltage), they allow an inward flow of sodium ions, which changes the electrochemical gradient, which in turn produces a further rise in the membrane potential. This then causes more channels to open, producing a greater electric current, and so on. The process proceeds explosively until all of the available ion channels are open, resulting in a large upswing in the membrane potential. Although local anesthetics do not block the mechanically gated ion channel (necessary for touch sensation), the voltage these channels are necessary for the propagation of any action potentials on the axon. Here is a youtube video that could help to visual the local anesthetic block on AP propagation. http://www.youtube.com/watch?v=ObQH1StDgvI You should do more research more on the role of Na+ in the propagation of APs. A good example of a drug that blocks voltage-gated Na+ channels is Tetrodotoxin (TTX). Here is a wiki page that describes the action of this neurotoxin. http://en.wikipedia.org/wiki/Tetrodotoxin
Should I take biology before anatomy and physiology? Why or why not?
Yes. It is the easier course and will teach you some of the vocabulary you need to learn A&P.
Human biology class vs. anatomy & physiology class? What is the difference?
biology is more general consideration of how organisms differ or not anatomy is structure and composition, i.e. histology and cellular differentiation physiology is a holistic view of how the parts and mechanisms of those parts interact toward homeostasis knowledge of chemistry and molecular biology is helpful for each
What is easier biology or anatomy and physiology?
Having taught both subjects, I don't think one is harder than the other It depends on the level at which each is taught (college-level Biology is a lot harder than middle-school A&P). What IS important is what you're interested in, since they are not the same thing. You're fortunate that you have the opportunity to take A&P without having taken Biology; until recently, I've always seen Biology as a prerequisite. If you want to go into nursing, skip the Biology. I teach basic A&P to nurses, and some have never had Biology (they are the ones who perform the worst).
Anatomy & Physiology Question! help!?
Tony Bowers, an exhausted biology student, was attending a lecture. after 30 mins or so, he lost interest and began to doze. as the lecture ended, the hubbub aroused him and he let go with a tremendous yawn. to his great distress, he couldn't close his mouth-his lower jaw was "stuck" opem. What do you think happened?
Which is harder AP Biology or Anatomy and Physiology?
It depends on you and your capability to memorize. With AP Biology you have to be able to apply what you know to situations so not only is it filled with a lot of vocabulary that you must remember but you also have to remember what each and everything in Biology does.With the Ap Biology you need to know how to use key terms rather than using words that are more broad. I know that for physiology, you have to be able to memorize a lot. Picking between these classes depends on you and what you are planning to do with your future career. If you plan on going into the medical field, physiology or anatomy could potentially help you a lot more. Biology would be better for generally any type of job that is science related, it doesn't have to involve medicine.
Take general biology w/lab I and Human Anatomy w/ Physiology I at the same time? Help!?
OMG what are you doing? No, don't take A&P with those classes. Your semester will be a living hell, I guarantee you that. Do you want to get A's a few classes or do you want to get C's or F's in a bunch of classes. It's up to you, but if I were your advisor, I'd tell you Hell no. And do you really think A&P is easy, especially as a freshman? It's like the hardest class imaginable. Don't do it!
Will taking anatomy and physiology at the same time as AP Biology help with understanding ap biology?
I teach AP Biology, and I've taught an A&P course in the past, so I can tell you that yes, there is a decent amount of overlap between the courses. There's a lot of things in AP Bio that the A&P course will not help with, like Photosynthesis or DNA, etc, but when you get to the organ systems part of the course, you'll see where taking the one class helps with the other. You may not immediately see the benefit, many teachers don't teach the organ systems until second semester, but it depends on the teacher.