Anatomy and Physiology Homework Help!?!

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I've had trouble with these few questions and would greatly appreciate any help. Thanks in advance!

1. When muscle tissue dies, it is usually replaced with dense irregular connective tissue. How do these tissues differ in structure? Will the muscle be able to function normally? _____ Why or why not?

2. Explain why a superficial skin scrape (such as a paper cut) doesn't bleed.

3. Would you expect to find more Meissner's corpuscles and Merkel discs present in the skin on the palm or on the posterior shoulder? Why?

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I wish I could help you, but I'm currently just in the nervous system :/

But I advice you to use google, I had some questions and I couldn't find the answers in the book, so I went to google and looked for animations, explanations ect and it helped me a lot. We are very fortunate to have such a tool along with our books and professors.

Good luck, I'm sure someone will be able to answer it here :)

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Specializes in Psychiatric, Med-Surg, Operating Room.
Mandy42392 said:

2. Explain why a superficial skin scrape (such as a paper cut) doesn't bleed.

I guess I'll take a stab. IIRC the epidermis does not contain blood vessels. The dermis is the layer with the blood vessels which supplies oxygen and nutrients to the epidermis.

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3. You would find more Meissner’s corpuscles and Merkel discs on your palms. Meissner's corpuscle is used to detect pressure and I think the merkel discs are use for vibration....the back of your shoulders don't need that much receptors because you don't use your shoulders as much as your hands.

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I think the above answers are correct, so I'll take a stab at #1...

1. When muscle tissue dies, it is usually replaced with dense irregular connective tissue. How do these tissues differ in structure? Will the muscle be able to function normally? _____ Why or why not?

Dense irregular connective tissue contains fibroblasts scattered amongst randomly oriented collagen fibers, whereas muscular tissues contain multinucleated muscle cells that are able to contract upon stimulation. Because the connective tissue cells cannot contract, the muscle will lose strength, and so muscle function will become impaired.

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Thank you all so very much!

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