Unanswered Questions
5,199 questions with no upvoted or accepted answers
21
votes
0answers
383 views
Effect of Aging on SA node's sympathetic fibers
I am trying to understand the effect of aging on the sympathetic fibers of SA node.
I know that aging shifts the vagal curve to left in frequency due to aging.
However, I am interested if aging has ...
15
votes
0answers
463 views
Identifying Some Kind Of Fossil
This was found off the coast of Ireland by a friend of mine. The running gag is it's some kind of fetish or totem and should be immediately discarded, but we're interested in whether it's perhaps a ...
13
votes
0answers
204 views
Does vaccination lead to short-term secondary infection suceptibility?
For clarity, here is a summary of my question, per anongoodnurse's comment:
Does a lower peripheral lymphocyte count resulting from recent immunization render us more susceptible to infection by other ...
12
votes
1answer
1k views
Deliberately choosing one nostril to breath through
James Nestor, on pp. 41-42 of his book Breath: the New Science of a Lost Art, claims the following.
The right nostril is a gas pedal. When you're inhaling primarily through this channel, circulation ...
12
votes
2answers
261 views
Are there certain symmetric-pair muscles that are slightly bigger and NOT due to handedness?
Ok, hear me out, I was just thinking about an article in Nature I read in the past titled "Scrotal asymmetry in man and in ancient sculpture"$^{\dagger}$ and more recently an entire medical textbook ...
11
votes
0answers
126 views
How do the biophysics of how cerebrospinal fluid mechanically protects the brain work?
The two mechanisms I've seen mentioned are the cerebrospinal fluid (CSF) acting as a hydraulic cushion or shock absorber, and how CSF creates a micro-gravity environment through buoyancy.
I have very ...
11
votes
0answers
397 views
Anatomical Angle Made by the Fingers of an Extended Palm
Does the angle made by the fingers (excluding the thumb) of an extended palm (as shown in the figure below) have a name (such as the Lovibond or Cobb angle, for instance) ?
I have already checked ...
10
votes
0answers
255 views
ID request ~2mm insect monstrosity
This tiny monstrosity (~2mm in length) was inside of some kind of "flat tent cocoon" on a pepper plant leaf in Washington state, USA.
Not sure what's going on here. Is it malformed or infected?
10
votes
0answers
401 views
What percentage of the genetic variance is explained by the 'n'- most important loci?
Introduction
Standard models in population genetics look up at the evolution of few loci which impact fitness. The variance in fitness is determined by the genetic variance and the environmental ...
10
votes
1answer
260 views
I am trying to identify this plant
I am trying to identify this medium arching shrub growing to about 1.5m high x 2m wide in the subtropical climate of the Mt Coot-tha Botanic Gardens in Brisbane, Australia. Unfortunately there was no ...
9
votes
0answers
155 views
How to reduce the quantity of (carcinogenic) mycotoxins in oatmeal?
Like all cereals, oat is commonly (nearly systematically) contaminated by several types of mycotoxin (produced by molds) known to cause cancer{1}. Oat is one of the most infected cereals{2}. Unless ...
9
votes
0answers
170 views
Identification of an animal building
I live in south-west Germany and today while mowing the lawn I discovered a strange structure. It looks like a molehill on which additional branches were placed. This kind of branches are easy to find ...
9
votes
0answers
368 views
Why are adenoviral vector vaccines safe in terms of insertion mutagenesis due to genome integration and E4 region's proteins effects?
Disclaimer: I'm neither a genetics professional nor an anti-vax fanatic, I just tried to compare COVID-19 vaccine types currently available on the market and got some questions that I'd like to answer ...
9
votes
0answers
157 views
Where does Darwin state his "principle of multiple utility"?
I have never heard of Darwin's 'principle of multiple utility', but several papers refer to it. For example, from Darwin at the molecular scale: selection and variance in electron tunnelling proteins ...
9
votes
1answer
174 views
What species is this aromatic plant found in a mountainous region of Greece?
This plant was found in the Taygetos mountains, Greece, and had a lemony smell.
Small plant about a foot high.
The shiny recurved leaves are reminiscent of rosemary, and the dry seed-heads seem ...