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Apr
28
comment Why don't membrane proteins move?
Related: Domains in cell membrane
Apr
24
comment What is A in IgA?
For igA, the heavy chain is of type α (Greek letter alpha, not Roman A).
Apr
17
comment Why is my right hand's thumb on the left side and my left hand's thumb on the right side?
Turn your hand over, then they'll be on the same side. Drop your arms to your sides, then they'll be to the front.
Apr
15
comment What are golgi blobs?
Golgi blobs are larger fragments and are resolvable by light microscope. The golgi haze is not resolvable and just causes scattering of light in the microscope as if it were a fog.
Apr
13
comment Does the creation of memory involve mRNAs crossing the synaptic gap?
The diagram is garbage. The book's author, Jensen, has a degree in English, not science, and the book is part of the promotion of his workshops on how to teach.
Mar
30
comment What is the meaning of the verb “lines” in this context?
(transitive) To cover the inner surface of (something), originally especially with linen.
Mar
25
comment What are cranial nerve nuclei?
The neurons of a CNN connect cranial nerves to the brainstem. Information flows both ways: sensory neurons within a CNN conduct info from the associated cranial nerve into the brainstem, and motor neurons in the same CNN conduct info in the reverse direction into the same cranial nerve.
Mar
25
comment What are cranial nerve nuclei?
A cranial nerve nucleus is not the nucleus of a nerve cell (neuron). As Wikipedia says, a cranial nerve nucleus is a collection of neurons in the brain stem.
Mar
17
comment Can someone identify this bird?
@WYSIWYG, it responds directly to the last sentence of the post, to wit: " Is there anything we can do to help it or are we better off leaving it alone?" It also gives addresses the other question ("Can you help us identify it?") by giving more information than the accepted answer, i.e. by naming three specific possible subgroups of the passerine birds.
Mar
6
comment Paper listed as “free full paper available” pubmed, but I'm unable to find the free full paper.
@VanceLAlbaugh, on the upper right of the PubMed page the link icon says on it "Full Text Online FREE" and "Wiley Online Library". The link uses the DOI, and the landing page seems not to have a way to read online free, only a PDF link which requires payment.
Mar
3
comment Construct a restriction map of a linear fragment of DNA using the following data?
Why are you listing only one of the possible fragment orderings for each cut result? (e.g. only 500, 350, 50 and not the other five arrangements, like 350, 50, 500 and 50, 350, 500)
Feb
10
comment How does the mechanism which controls blood pressure in the brain work?
With regard to blood pressure in the brain, note that besides the general baroreceptor in the aorta at the output of the heart, there are two at the carotid sinuses. The latter are in the neck just under the head and sense the pressure of the blood flowing into the head, providing close control of the blood pressure in the brain.
Feb
1
comment Animals in predicting disasters..!
Animals do not have any special sense which allows them to predict earthquakes or similar disasters, but humans do have an ability believe most anything they hear, or, especially, see written down.
Jan
25
comment Why does heating kidney beans at a low temperature potentiate the toxicity of phytohaemagglutinin?
The source quoted is the first edition (2009) of the FDA's Bad Bug Book. The second edition (2012), no longer asserts that the toxicity increases over the raw state when heating to 80°C, nor does it contain the assertion that "Undercooked beans may be more toxic than raw beans."
Jan
19
comment “Prime” structure of DNA Double Helix: Confusion
In the SE post that OP mentions, the diagram is immediately preceded by a link to the source page of the diagram (via the word "schema"), and on that page there is a "Homework:" paragraph noting that the diagram is mislabeled.
Jan
15
comment How much genetic divergence must there be to yield two different species?
Besides "species" being an ill-defined term, the required genetic divergence isn't appropriately characterized by "how much" genetic change, but rather what precise genes have changed in what ways to prevent population mixing. A single gene or two might cause it, if it affects a critical function, say having to do with sperm/ovum compatibility.
Jan
7
comment Is hypoxia/anoxia the ultimate cause of death?
There is no one ultimate cause of death. For instance, there are neurotoxins which kill brain cells while oxygen remains plentiful, and there is complete disruption of the brain, as with a suicide-bomber.
Jan
2
comment Genotype of children conceived after stem cell transplant?
Infertility is common after chemotherapy or irradiation done for transplants, so the question in that case would be moot.
Dec
22
comment What did pangolin scales evolve from?
Their closest relatives are carnivores, not anteaters, sloths, and armadillos. See DOI: 10.1186/1471-2148-6-93.
Dec
8
comment What effect is seen when the extracellular concentration of sodium is increased?
The question is closed, so answers can't be added, and existing answers generally should not be edited to add material. Welcome to Biology stackexchange Patricia; try adding an answer to an open question instead of this closed question.