General Question

bhec10's avatar

Anyone here an expert in anatomy/muscles?

Asked by bhec10 (6458points) February 18th, 2010

I need to know the answer to this question, please:

During extension of the thigh around the hip joint, which of these muscles act as an agonist and antagonist pair?

Is it:

a) gluteus maximus and vastus lateralis respectively,
b) gluteus maximus and biceps femoris respectively,
c) rectus femoris and gluteus maximus respectively,
d) gluteus maximus and rectus femoris respectively,
e) rectus femoris and psoas major respectively?

Thanks in advance

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11 Answers

ParaParaYukiko's avatar

Homework, huh? Try checking your textbook.

Can’t help you out, sorry. Good luck.

bhec10's avatar

No, it’s not homework. I’m studying for an exam and saw that question. And we don’t use textbooks, unfortunately :/

bhec10's avatar

I just found out that the gluteus maximus is involved in the extension of the thigh. That means that option e) is excluded.

Anyone have any idea?

gailcalled's avatar

If the fluther guidelines didn’t expressly forbid it, I would suggest using a search engine, typing in “leg, thigh muscles” and use “image” hyperlink. That is what I would do in order to help answer your questions. But, unfortunately, I can’t. (But you can.)

chicadelplaya's avatar

Okay! thanks for making me bust out my old A&P book!
The gluteus maximus extends the thigh at the hip joint (agonist), and the rectus femoris acting alone flexes the thigh at the hip joint (antagonist). So my educated guess would be d) gluteus maximus and rectus femoris. I kinda miss studying Kinesiology Good luck on your exam! :)

bhec10's avatar

@chicadelplaya Thank you so much for answering my question :) That was my guess as well, because those muscles appear in two different options but not in the respective order. Thanks!

chicadelplaya's avatar

@bvdshec17 You’re welcome! And fyi:
The vastus lateralis extends leg at the knee, and biceps femoris flexes leg at knee joint (and extends thigh at the hip joint). If you have to take any more of these exams I would recommend finding a good used A&P book. It would help you a lot! I’ve had mine for years and I still reference it. :) Have a great day!

bhec10's avatar

@chicadelplaya Yeah, I think I’m heading to the library tomorrow and get a good book on that. Many thanks :-)

Zajvhal's avatar

Thanks for reminding me that I need to brush up on my muscle knowledge!!

bhec10's avatar

Oh yeah! I got 100% on my Portfolio Test :D

@chicadelplaya Thanks a lot for your answer, one of the questions was about the biceps femoris! Yay!!

chicadelplaya's avatar

@bvdshec17 N I C E!!! Happy I could help. :) Have a great weekend!

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