Ah, OK I think I see. So at the instantaneous time of impact each rock a=0 but the next time frame the collision changes the a's for each rock generating force? This force builds upon itself (over the next several milliseconds) as each rock adjusts to the force applied by the other due to their...
I'm new to physics, so I'm sure the explanation is very simple, but I cannot wrap my head around Newton's 2nd law F=ma. It is very easy to understand until I plug 0 into a. Wouldn't this make the force of the reaction disappear?
For instance if a 100kg rock traveling east at constant velocity...
Working memory is the 'online' information that is being processed at a given time. Working memory is usually dumped fairly quickly and not always sent for further memory storage (short term memory, long term memory etc).
Think of working memory (WM) as a type of rough drafting tool that you...
Thanks for the great information. Sorry to hijack this thread, but in light of these last posts I still have some questions I feel compelled to ask!
MC1R is a G-coupled protein receptor that binds pituitary hormones called melanocortins, including ACTH. MC1R Wiki. ACTH is upstream of the...
From a neuroscientific perspective, exercise stimulates the release of molecules that enhance the signaling of brain cells and promotes neurogenesis (new neurons are made in two regions of the human brain, one important for learning and memory). Running also enhances the brain to synchronize...
Thanks for the precise clarification Ygggdrasil, it is important to not use terminology loosely. I thought that it was more common for the dominant allele to exert dominance over the recessive allele through some sort of direct or indirect inactivation mechanism (like Xist-mediated X chromosome...
Well, the bulk of my post was correct. Just the usage of the word 'silence' in the last sentence was wrong so I fixed it. I agree with you in the case of eye color that b is not being silenced and have explained it more accurately in a more recent post.
But some alleles can silence other...
Exactly
There are many ways that a dominant allele overpowers a recessive allele. The eye color gene encodes for melanin and B is a darker colored melanin while b is lighter. The darker color pigments in B reflects more than just blue wavelengths of light so it gives a darker appearance to the...
And this is why, if one tries to remove the cancer with surgery or toxins, if even one cell escapes treatment that single microscopic cell will continue the cancer by replicating exponentially. This is another reason why it is so difficult to remove.
It's not that a recessive allele is an undesired gene and causes a nonfunctional protein. A recessive allele will simply not be expressed in the presence of a dominant allele. It recedes expression to the dominant allele. Eye color is a good example.
To keep things overly simple, let's...
http://thebrain.mcgill.ca/flash/index_a.html
This is one of my favorites. Note there is a level selector on the top so you can read lessons in beginner intermediate or expert detail. Once you are inside a topic there is a field selector from social to molecular.
Yes, the base pairs bind readily due to hydrogen bonding but to form the phosphodiester bond, that is the flexible supportive backbone of the DNA molecule, you would need DNA ligase (and ATP).
ps Apparently, this thread is restricted to only Norse mythology themed profile names. So speak up...
What about lobsters? They do not have a central brain per se but rather a simple neural network that allows its body to respond to the environment. Does this constitute a 'brainless' animal?