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Questions tagged [locomotion]

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50
votes
1answer
6k views

Do large animals experience a meaningful delay when moving their most distant appendages?

According to the Physics Factbook, nerve impulses travel at speeds anywhere from 1 meter per second up to around 100 meters per second. Blue whales reach up to around 30 meters long. For a full-size ...
0
votes
1answer
98 views

Anatomy of joints of human hand

Q) A girl slipped and is falling. She puts out her arms to prevent falling. Which joints are most affected by her fall? Fibrous and Synovial joints. Cartilagenous and Synovial joints. Fibrous and ...
1
vote
1answer
65 views

Why must bacteria outrun diffusion?

In 'E.coil in Motion' Howard Berg says that 'If it [a cell] is to go far enough to find out whether life is getting better or worse, it must outrun diffusion.' I am confused about the exact ...
1
vote
0answers
869 views

Locomotion of Hydra: Why Somersaulting is better than Loop locomotion when moving to a larger distance?

In my text I read about different types of locomotion of Hydra where I learnt that generally Hydra moves by somersaulting and it is faster than 'Loop locomotion' which Hydra uses for moving to a large ...
2
votes
1answer
183 views

Why do cells not spread on soft substrates?

I recently read a paper discussing how cells (primary mouse embryo fibroblasts) fail to spread and proliferate properly when plated on a soft substrate (i.e. soft PDMS pillars with stiffness k = 2.3 ...
3
votes
1answer
581 views

Can geckos climb a wet surface?

We know geckos can climb vertically or even upside down a surface like glass. But can they do that on wet glass?
6
votes
1answer
119 views

Best tail for swimming?

I understand that the vertical tails of fish and the horizontal flukes of cetaceans evolved due to the spinal movements of their ancestors but I was just wondering if there has been any investigation ...
9
votes
2answers
1k views

Are viruses self-propelled?

So obviously, viruses are nonliving. But when my teacher was teaching viruses in the video (we're doing "flip" learning this semester), the way he described it, it seemed like the viruses responded to ...
6
votes
2answers
20k views

Can all mammals swim?

When I checked it seemed trivial to answer: yes, all mammals can swim. But research on the internet provided different information. I found: people and primates cannot swim, but can be taught how to ...