# Questions tagged [bio-mechanics]

The study biological systems in regards to their ability to apply and respond to mechanical forces.

33 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
3 votes
0 answers
43 views

### Mechanics of Peregrine Falcon Dive Pull Up

There are loads of information on how fast the Peregrine Falcon dives, but aside from having specialized lungs, eyes, etc... to survive the dive. What mechanics does it use to pull out of such a dive,...
• 31
2 votes
0 answers
92 views

### Calculate radius of curvature of DNA

I am using this article to calculate the radius of curvature of DNA. I know that 150bp segment of DNA length wraps itself 1.7 times around a histone core. There are 0.34nm/bp DNA's persistence length ...
2 votes
0 answers
20 views

### The exact points of muscle attachment and the "equal and opposite force" that skeletal muscles apply

I've been trying to make a simple simulation of the human body executing some motions in Mathematica (the details are irrelevant), but I need to know some more information about muscles and how they ...
2 votes
0 answers
55 views

### why does water go from high to low osmotic pressure to decrease the size of the nucleus?

I am reading this paper "Volume regulation and shape bifurcation in the cell nucleus" (linked below) https://jcs.biologists.org/content/joces/128/18/3375.full.pdf I am confused by this ...
2 votes
0 answers
38 views

### Do tarantulas and humans have the same mechanism for growing hair?

There's hair on my arms. Tarantulas also have hair on their arms. Is this the same type of hair?
• 121
2 votes
0 answers
40 views

### How does anaerobic burst-flight performance scale with mass?

Quails employ anaerobic burst flight to escape predators and the Quetzalcoatlus northropi have most likely used it during launch and climb out, then transition to soaring. Now, I have read these ...
2 votes
0 answers
35 views

### How does fungi network transfer substances between plants?

How does fungi network transfer substances between plants? I recently read a short article about fungi network. And I am wondering about how fungi network works (Mechanism). Plants have fungi ...
• 253
2 votes
0 answers
52 views

### Are trees still carrying their leaves more likely to be felled by an autumn storm?

Is there evidence that trees still carrying their leaves are more likely to be felled by an autumn storm than trees already having lost their leaves? At first sight this seems plausible (and might be ...
1 vote
0 answers
19 views

### Movement of the Ribcage during movements of the Thoracic Spine

I want to find a rough relation between the angle of rotation of the thoracic spine and the corresponding segmental movements in the skeleton of the ribcage. I have come across some research which ...
• 11
1 vote
0 answers
166 views

### Biological reason for "deadlift face"?

Always when I deadlift at the maximum load, my face looks more or less like this: or this: The same applies for when I do other heavy-weight exercises. But what biological mechanism causes that? ...
• 295
1 vote
0 answers
14 views

### Actin-myosin cortex stiffness VS elasticity

I have two questions on the mechanics of actin-myosin network: 1- Actomyosin cortex as an elastic material is defined by its elastic modulus $E$. But I know that elasticity would be described by the ...
• 193
1 vote
0 answers
38 views

### Question about the basilar membrane mechanics (cochlea)

I am reading about the mechanics of the basilar membrane in the inner ear. In various publications, it is said that, at a specific position on the basilar membrane, the outer hair cells are activated ...
• 39
1 vote
0 answers
58 views

### Origins of the body mechanics theory

In physical therapy and occasionally in sports coaching, there's often a precise description of the mechanics of what happens during the movement (which muscles are engaged, which joint moves where ...
• 41
1 vote
0 answers
373 views

### Movement of the Thoracic Cage During Movements of the Thoracic Spine

Just for a bit of context: I am trying to create a 3D digital model of the human skeleton as the first step towards computer generated muscle simulation, and as such I want the skeleton to be as ...
1 vote
0 answers
95 views

### Tensile strength of collagen?

Really specific question, but what is the average tensile strength of human collagen, type I? I've tried looking for it online, and either my google-fu skills are weak, or I'm just unlucky. Also, is ...
• 508
1 vote
0 answers
40 views

### about the muscle's tension's variables

I'm reading the paper "THE PROBLEM OF THE INTERRELATION OF CO-ORDINATION AND LOCALIZATION", which is written by N. Bernstein. The paper said "The degree of tension of a muscle is a function, in the ...
1 vote
0 answers
876 views

### Strongest bone in body

AS internet tells is it is thigh bone which is strongest, but why, it carry only upper part of body, does not heel or any foot bones should be strongest in body as they carry full body weight ?
• 1,787
1 vote
0 answers
35 views

### Muscle involved in carrying load on head

I have seen people carrying heavy load on their head especially in 3rd world countries, does carrying on head any benefit or harm, which muscle get strengthen in doing it?
• 1,787
1 vote
0 answers
985 views

### Three foramen lying in one vertical plane

In the human skull we can see that 3 foramina named as supraorbital notch(foramen) , infraorbital foramen and mental foramen share a common vertical plane. Is there any surgical significance of for ...
• 4,786
1 vote
0 answers
389 views

### How is the Force of Contraction Applied to the Tendons by the Muscle's Individual Fibers?

Image and question have been updated for clarity! The image above is a side view of a semi-transparent skeletal muscle. The dark red lines represent individual fibers, the blue lines represent ...
• 81
0 votes
0 answers
46 views

### Can a crocodile crack open a turtle's shell?

To put the question more accurately I consider the Saltwater Crocodile, which has been measured to have a bite force of 16.4 kN and estimates of up to 34 kN in 6.7-meters long individuals. For turtles ...
• 1,082
0 votes
0 answers
25 views

### Is there a detailed model of the resonance of the basilar membrane and excitation patterns of hair cells?

I've read that it's generally understood that deeper parts of the cochlea are sensitized to lower frequencies, and regions closer to the oval window are sensitive to high frequencies. In a sense, a ...
• 101
0 votes
0 answers
26 views

### D-Galactose effects on primates?

A lot of studies are made using D-Galactose as a accelerated aging model in rats and mice, but why not in non human primates? How much relevant is the galactose rat model for human health perpective? (...
0 votes
0 answers
31 views

### Proof of shape of epithelia cells

In this article, the mentioned in the introduction that the the optimal shape of epithelia cells in drosophila tissue is hexagonal (packing is approximately 6). Is there an article that proves ...
• 193
0 votes
0 answers
45 views

### Are the muscles of all animals mechanically similar?

For instance, is the skeletal muscle of an elephant made of the same balance of fibers and cells as the skeletal muscle of a hippopotamus? I recognize that slow- and fast-twitch muscles are a thing, ...
0 votes
0 answers
198 views

### Examples for oscillatory behaviour in the human body

I'm looking for examples in the human body which show periodicity, more precisely, I'm looking for examples of oscillating reactions that occur in the human body which can be modelled using the ...
• 189
0 votes
0 answers
62 views

### Human femur maximum strength

In this video https://www.youtube.com/watch?v=os98s9kBlOI it is demonstrated that a moose leg bone can support until nearly 10 tonne before break. Is there any similar demonstration on human femurs? ...
• 101
0 votes
0 answers
117 views

### Etymology of eccentric/concentric contractions

I was wondering if anyone knew why the terms eccentric and concentric were chosen to refer to lengthening and shortening muscle contractions? The basic etymology of the words are to do with ...
• 101
0 votes
0 answers
1k views

### Bite Force of Triceratops

Estimations (or measurements) of bite force is usually conducted for toothy predators like sharks, theropod dinosaurs and crocodiles. For example: Tyrannosaurus had a bite force of about 57 kN (about ...
• 1,082
0 votes
0 answers
38 views

### How are ants able to dig with such pointy limbs?

Digging is usually efficient with somewhat broader structures shovels, no one tries to shovel with an ice-pick. Given that ants have very pointy mandibles and thin wispy legs, how are they able to dig ...
• 615
0 votes
0 answers
974 views

### Curved membrane effect

Curved Membrane effect: Movements of the tympanic membrane are more at the periphery than at the centre where malleus is attached which provides some leverage. This is called as curved membrane ...
• 4,786
0 votes
0 answers
25 views

### How pulmonary vasculature removes embolism?

This book says: Pulmonary vasculature removes emboli before they reach into systemic circulation. I can speculate that if the emboli are made of fat or clot then our body could degrade it but how ...
• 4,786
0 votes
1 answer
83 views

### In human anatomy what is the purpose of measuring shoulder abduction and shoulder adduction separately if they cover the same range of motion?

In human anatomy what is the purpose of measuring shoulder abduction and shoulder adduction separately if they cover the same range of motion? For example, this video Goniometry Shoulder Abduction &...
• 735