Questions tagged [human-biology]

This tag is for questions about the general biological features of human beings (as opposed to the biology of non-humans).

Filter by
Sorted by
Tagged with
0
votes
0answers
5 views

Quantitative Physiology Textbooks Recommendations?

I am currently completing a 2nd year (UK) Mamamilian Physiology Module and a Neuroscience Module. However, my degree is also 40% Maths and Statistics. So in order to learn the content better, I am ...
-2
votes
0answers
22 views

Bio transformation [closed]

1-What is the difference between metabolic activation and detoxification? I am taking about the differences in their mechanisms? 2-In the third phase of bio transformation, what is the difference ...
-1
votes
0answers
30 views

movements of lipids in cell membrane [closed]

What purpose do the lateral and flip flop movements serve in the plasma membrane? Why is their presence necessary? Attempt: Well I have read about these movements. The lateral movement is very common ...
1
vote
1answer
28 views

Why don't sodium Voltage Gated Channels open during Repolarization?

During Depolarization the Sodium VGC open when they receive the Threshold Stimulus. But when Repolarization occurs there comes a point when the cell interior has exactly the the same potential that it ...
0
votes
0answers
24 views

I think I can find out if the food is salted by smell. Is it possible scientifically or just my impression?

I think I can find out if the food is salted by smell. Is it possible scientifically or just my psychological impression?
2
votes
1answer
48 views

Is Pars intermedia functional in humans?

My textbook says, "Pars intermedia secretes only one hormone called melanocyte stimulating hormone (MSH)." My teacher says that in humans MSH is secreted by the anterior lobe because the ...
-2
votes
0answers
15 views

someone find out the difference between meiosis and mitosis so she studied how red blood cells undergo cell division. Is her method appropriate? [closed]

someone find out the difference between meiosis and mitosis so she studied how red blood cells undergo cell division. Is her method appropriate? If not, what could she do to improve her experiment and ...
0
votes
0answers
23 views

combustion vs biological oxidation of glucose [duplicate]

I am a high school student and I am a little confused in cellular respiration, To represent respiration many biology text books just writes, C6H12O6 + 6 O2 --> 6 CO2 + 6 H2O But in actual ...
0
votes
0answers
22 views

Human simulation software for experimenting

Is there any simulation software that imitates the physical and/or functional properties of living cells/organs (Such as neurons, skin, and bone) and that can be used for experimenting? (Such as ...
-1
votes
0answers
6 views

Which bacteria has lateral endospore? [closed]

Which bacteria has lateral endospore? Is it Bacillus or Clostridium?
0
votes
0answers
23 views

Why does touch the face make more likely to be infected?

Why is it risky to touch the face although there is no direct contact with into the nose, eyes and mouth? Is there any possibility that pathogens infect us from our facial skin? Suppose we have ...
-5
votes
0answers
90 views

Can mRNA entering cells via vaccination possibly integrate into the genome?

In mRNA vaccine, any viral reverse transcriptase that could possibly transcribe viral RNA to DNA has been deleted, the only mRNA that enters the cell is the one coding for the immungenic protein (...
0
votes
1answer
23 views

neural genes expressed in nasopharyngeal specimens

Is it possible in a nasopharyngeal specimen genes of neural system to be expressed? For example, genes about neural differentiation?
0
votes
1answer
32 views

What is the significance of running an uncut plasmid on electrophoresis gel?

What is the significance of running an uncut plasmid on electrophoresis gel? In this case we are talking about inserting a gene into plasmid, which then goes under PCR and then electrophoresis.
0
votes
0answers
11 views

What is the relationship of stimulants to hair loss?

I've noticed several topical hair loss products (ex: minoxidilmax) add caffeine to their recipes with the claim that "caffeine stimulates blood flow to the scalp" thereby improving hair ...
4
votes
1answer
118 views

What stops myosin during muscle relaxation?

I understand that when the muscle is relaxed tropomyosin blocks myosin binding sites on actin filaments thereby preventing muscle contraction. What I am concerned with however, is whether myosin ...
1
vote
0answers
73 views

What property of water explains how sweating helps the runner continue running?

My question I have to answer is: A runner picks up pace on a warm day and starts sweating profusely. What property of water explains how sweating helps the runner continue running? The following are ...
-1
votes
0answers
22 views

Does any tendon in humans receive a high amount of blood supply? Or is the property of not receiving a large blood supply a constant across tendons?

I read on https://www.physiocomestoyou.co.uk/blog/all-you-need-to-know-about-tendons/ (mirror): [Tendons] do not have a large blood supply. Does any tendon in the human body receive a high amount of ...
0
votes
0answers
24 views

Has the human capacity to heal from burns evolved due to actual burns throughout human history?

I just burned myself while cooking, and it occurs to me that although this has happened countless times, my skin always heals itself rather well after burns. In this post I make various assumptions/...
0
votes
0answers
8 views

Is the binding of androgen to androgen receptor in prostate cancer cells a requirement for the production of prostate-specific antigen?

The binding of androgen to the androgen receptor results in the transcription of androgen-regulated genes, which signals the proliferation of prostate cancer cells. This process also produces prostate-...
15
votes
1answer
3k views

Why do diseases in the tap water of developing countries affect people from developed countries more?

My siblings and I went abroad to a country that doesn't have drinkable tap water, but we did not know this at the time as the people who lived there used to drink it all the time with no issues. One ...
0
votes
0answers
18 views

How do myosins cause myofibrils to be shortened?

I know that it is the binding and tilting of myosins on actins that cause the sarcomere to be shortened. But I am a little bit confused about the details. The structure of a sarcomere is made of ...
-1
votes
1answer
57 views

Why is the food we consume right from birth not immunogenic to elicit an immune response? [closed]

Excluding the hypersensitive reactions which are individual specific, how is food we consume considered safe by the immune system?
2
votes
0answers
53 views

What is the function of human Trypsin Inhibitor if trypsin is secreted in the inactive form of Trypsinogen? [closed]

I was reading about pancreatic digestive enzymes in a Textbook of Medical Physiology and I came across Trypsin Inhibitor. The text stated that: It is important that the proteolytic enzymes of the ...
0
votes
1answer
41 views

Can we apply NGS (next generation sequencing) on DNA extracted from formalin fixed paraffin embedded tissues (FFPE)?

I'm working on the microbiome and I can only use tissues which are fixed with formalin and embedded in paraffin. Is it possible to apply NGS (next generation sequencing) on FFPE (formalin fixed ...
0
votes
3answers
259 views

If due to some reasons a small portion of our neurons die, how does our body remake them?

There are various reasons such as intake of neurotoxins, and possibly traumatic injuries, that can cause neurons to die. After several hundreds, or thousands of our neurons die, how does our body ...
0
votes
1answer
55 views

Can a human survive without ACE2?

I guess not, but it was discovered in 2000 so I don't know if we know enough about it. Are there people without ACE2 (angiotensin converting enzyme 2)? It seems mice can survive, but that's not a ...
2
votes
0answers
34 views

Does The Sympathetic Nervous System Increase or Decrease Urination?

According to my book: Sympathetic nervous system stimulation, leads to the release of Norepinephrine(Noradrenaline), priming the body for the "Fight or Flight" response. It is also stated ...
1
vote
1answer
85 views

Why does exhaled air still contain oxygen?

If the partial pressure of oxygen in the atmosphere is 159 mmHg and that inside human alveoli is 104 mmHg, and if these values are fixed or don't change very much, then why does exhaled air have ...
0
votes
1answer
35 views

What is the difference between a myofibril and a myoblast? (In skeletal muscle)

I read that a muscle fibre (myofiber) is formed when myoblasts fuse. https://teaching.ncl.ac.uk/bms/wiki/index.php/Skeletal_muscle#:~:text=The%20multinucleate%20feature%20is%20established%20in%...
2
votes
1answer
30 views

What is the difference between a dermatome and a sensory neurone?

I read that a dermatome is an area of skin supplied by a single spinal nerve but that this is sensory information? Why do spinal nerves supply the skin? I thought it was the other way round- sensory ...
4
votes
1answer
57 views

Do adult mammalian cochlear inner hair cells regenerate?

The consensus seems to be no, but I see conflicting evidence. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5361427/ Supernumerary human hair cells—signs of regeneration or impaired development? A ...
1
vote
0answers
23 views

What is the process of aging exactly? [closed]

Getting old Hello community, I have been thinking about age, and I thought that aging is the reverse of how a biological system is able to fix itself over time. Actually, some species actually are ...
1
vote
1answer
35 views

How do organophosphates affect kidney function?

Many organophosphates, besides inhibiting acetylcholinesterase, can also permanently inhibit the enzyme neuropathy target esterase, leading to nerve damage. NTE also happens to be found in the kidneys,...
1
vote
0answers
37 views

Is a “Nerve” a cell or a tissue? [closed]

Nervous tissue includes Neurons and Glial cells. Neurons have soma and other projections (neurites) namely Axon and Dendrites. Axon or dendrites of a nerve cell covered with endoneurium is called ...
0
votes
0answers
13 views

Does anybody have an references to share or idea onhow the tumor behaviour changes as it grows from oligometastasis to polymetastasis?

I have looked at the literature and mostly scientist discuss about how a metastatic lesion is formed. But what I am interested to learn is how does a new metastatic lesion develop when there is ...
0
votes
2answers
77 views

Why do we have to move in the cold for higher chance of survival?

To survive in the cold temperatures, a person should move as much as possible so that they do not freeze to death. But constantly moving also leads to the body becoming more and more exhausted. Why ...
1
vote
1answer
14 views

Looking to understand the difference between (Fibroblast Growth Factor) FGF-2 and FGF-5

Non-biologist nor medically trained person here, but still nonetheless interested in the functioning of the human body, and more specifically, hair growth cycles. I've read in several sources that FGF-...
-1
votes
1answer
44 views

Can you eat more calories than the body can store?

I believe I have read that if the body takes in too many certain nutrients/vitamins, the body simply excretes them. How does this behave with calories? If I have a daily consumption of exactly 2,000 ...
-4
votes
1answer
89 views

Why do humans need pillow to sleep better? [closed]

As far as I know, no animal sleeps with a pillow/support under their heads. Why then do we need to keep a pillow?
-1
votes
1answer
38 views

Is it true that recanalisation of the vas deferens, if any, tends to happen soon after a vasectomy (less than 1 year), and if so, why?

https://doi.org/10.1016/s0140-6736(00)02436-3 "How reliable is a vasectomy? Long-term follow-up of vasectomised men": Most episodes of recanalisation are believed to happen soon after ...
3
votes
1answer
126 views

Mammary gland development and lactation

I was reading on mammary gland development, and I found this (1): As a girl approaches her teen years, the first visible signs of breast development begin. When the ovaries start to produce and ...
0
votes
0answers
75 views

Is there an animal venom to which humans are naturally resistant?

Some species, no matter how poisonous or venomous, have natural predators that can withstand the poison/venom. Does human also have something similar? This question came to me after I spent an hour ...
2
votes
0answers
24 views

Constitutive Dark Skin vs Facultative Tanned Skin

Most can easily spot the difference between a tanned and dark person. But from my research, the only difference is in the size and concentration of melanin (Jablonski). But this continues to increase ...
0
votes
0answers
25 views

Staphylococcus (antibacterial soaps and Traditional Lathering soaps)

I have been working on a biology research assignment regarding the claim: Antibacterial soaps are superior to traditional lathering soaps in minimizing the transmission of disease I have made a ...
0
votes
0answers
20 views

EM field in living organisms and tissue resonance frequency

I have two questions which I can't find enough information about, and I would be very grateful if someone could give me a lid to the answer: As far as I know, if we accelerate charged particle it ...
0
votes
1answer
74 views

What kind of people are more likely to catch COVID-19?

It is well known that people of old age or with respiratory problems are more vulnerable by the effects of COVID-19. However, I wasn't able to find information on any similar trends on catching the ...
1
vote
0answers
70 views

Why is thoracic breathing dominant in women while abdominal breathing is dominant in men?

In human males, lateral movement of thorax constitutes 25% of breathing while abdominal movement accounts for 75% of breathing. It is exactly the opposite in the case of women. I got this piece of ...
1
vote
1answer
57 views

Partial pressures of different gas in human blood and how they are calculated?

In Respiratory Physiology, we use the $P_x{O_2}$ and $P_x{CO_2}$ in blood at different regions of the peripheral circulation. From my Chemistry knowledge I know that $P_x$ of a gas in a solution is ...
0
votes
0answers
54 views

Na+ / K+ ATPase: How does it restore resting membrane potential? [duplicate]

Could not find any sources talking about this (in a clear manner). If the Na+ / K+ ATPase pumps 3 Na+ out for every 2 K+ it pumps in, thus making the cell more negative, why is the Na+ / K+ ATPase ...

1
2 3 4 5
48