ACSM 030-444 Exam - Topic 2 Question 17 Discussion

Actual exam question for ACSM's 030-444 exam

Question #: 17
Topic #: 2

[All 030-444 Questions]

The prime movers for extension of the knee are the

ABiceps femoris.

BBiceps brachii.

CQuadriceps femoris.

DGastrocnemius.

Show Suggested Answer

Suggested Answer: C

by Vinnie at Nov 24, 2025, 12:02 PM

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Nobuko

1 month ago

Same here! It's a straightforward question.

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Velda

1 month ago

I feel confident about this one. Quadriceps are key!

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Shannan

2 months ago

True, but it mainly flexes the knee. C is more accurate.

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Deandrea

2 months ago

But what about D) Gastrocnemius? It helps too, right?

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Joaquin

2 months ago

Yeah, I agree! They extend the knee.

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Zana

2 months ago

I think it's C) Quadriceps femoris.

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Merrilee

2 months ago

Biceps femoris is for hamstring stuff, not knee extension!

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Zona

2 months ago

Wait, are you sure? I always mix those up.

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Ty

3 months ago

Totally agree, it's all about the quads!

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Matthew

3 months ago

I thought it was the Gastrocnemius?

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Lauran

3 months ago

It's definitely the Quadriceps femoris!

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Elmira

4 months ago

Haha, B) Biceps brachii? Really? That's like saying your arms extend your knees. Good one!

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Kenneth

4 months ago

The quadriceps are the prime movers for knee extension, no doubt about it.

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Jose

4 months ago

Definitely C. Quad squad for the win!

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Valentin

4 months ago

C) Quadriceps femoris. Easy peasy!

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Edelmira

4 months ago

Definitely going with quadriceps femoris for this one. I recall it being the prime mover in knee extension from my notes.

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Elbert

4 months ago

I feel like the gastrocnemius might play a role too, but it’s mainly for plantarflexion, isn’t it?

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Gilberto

5 months ago

I remember practicing a question like this, and I think the biceps femoris is more about flexion, right?

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Melinda

5 months ago

I'm feeling a bit lost on this anatomy question. I'll need to review my notes on the muscles of the lower limb before moving on.

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Kiera

5 months ago

Okay, let me review what I know about knee extension. The quadriceps are the prime movers, so I'm going to go with C on this one.

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Chan

5 months ago

I think the quadriceps femoris is the main muscle for knee extension, but I’m not entirely sure.

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Daron

5 months ago

I'm a bit unsure on this one. I know the quadriceps are involved in knee extension, but I'm not sure if the other options might also play a role.

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Aliza

6 months ago

C) Quadriceps femoris. Gotta love those quads!

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Berry

6 months ago

I'd say C, but I'm still trying to figure out how the gastrocnemius fits into all this. Knee and ankle, you know?

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Alva

6 months ago

The quadriceps femoris is the main muscle group that extends the knee, so I'm pretty confident C is the right answer.

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Jani

6 months ago

Hmm, I think this is asking about the muscles that extend the knee. I'll need to think through the options carefully.

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Kirk

15 days ago

Definitely go with Quadriceps for the primary action!

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Candida

20 days ago

True, but it's more of a secondary mover for the knee.

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Avery

26 days ago

What about the Gastrocnemius? It helps too, right?

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Dominque

1 month ago

Yeah, they are the main knee extensors.

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Beatriz

5 months ago

I believe it's the Quadriceps femoris.

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