Qualification > Sciences
Edexcel BIOLOGY Doubts!!!!
Nikita Eshrat:
http://wiki.answers.com/Q/Why_are_tendons_inelastic
-- see if this helps!
-Cornea:
iam doing unit 3 for the third time i really need to do well this time because i need 2 more marks to score an A . In this examination session i got a c in unit 3 it's really tough although i don't find it hard i don't know where i go wrong any tips please :S
Deadly_king:
--- Quote from: Ang3l on February 02, 2012, 12:02:02 pm ---Why are tendons inelastic?
--- End quote ---
Tendons are parallel bundles of collagen that attach muscles to bones. Tendons are inelastic but flexible. Tendons concentrate the pull of the muscle on a small section of the bone. Some tendons are surrounded by a sheath. The tendon sheath is a tubular, double layer sac that contains synovial membranes and synovial fluid. Synovial fluid acts as a lubricant for the tendon. Achilles tendinitis is when the tendon rubs against the sheath and becomes swollen and inflamed, usually because of overuse or lack of synovial fluid. Lack of synovial fluid can be caused by poor diet.
Now if you want to know more about it, study about the features of collagen ;)
Malak:
^ that was a lot of detail :P
I have another confusion ::)
Describe how plants detect light using photoreceptors and how they respond to environmental cues.
I know the photoreceptor part but when it comes to responding to environmental cues i am confused.
Are they talking about tropisms (auxin and all that) or how phytochromes respond to the cues, e.g. germination etc. ?
Romeesa-Chan:
--- Quote from: Ang3l on April 07, 2012, 10:46:33 am ---^ that was a lot of detail :P
I have another confusion ::)
Describe how plants detect light using photoreceptors and how they respond to environmental cues.
I know the photoreceptor part but when it comes to responding to environmental cues i am confused.
Are they talking about tropisms (auxin and all that) or how phytochromes respond to the cues, e.g. germination etc. ?
--- End quote ---
This might be useful:
http://www.slideshare.net/menmaatre.kiya/biology-notes-topic-8
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