The muscle labeled A is the
[ Select ]
Gracilis
adductor magnus
Semitendinosus
Semimembranosus
Biceps Femoris
and B is the
[ Select ]
Biceps Femoris
Gastrocnemius
Soleus
Popliteus
Tibialis posterior

Question

The muscle labeled A is the 
[ Select ]
Gracilis
adductor magnus
Semitendinosus
Semimembranosus
Biceps Femoris
 and B is the 
[ Select ]
Biceps Femoris
Gastrocnemius
Soleus
Popliteus
Tibialis posterior

BlackTom AI · Accepted Answer

We need to identify two muscles labeled A and B from the given lists.
First, considerMuscle A: the options for the A position are Gracilis, adductor magnus, Semitendinosus, Semimembranosus, and Biceps Femoris. Since the question appears to pair A with a muscle from the posterior thigh group and B with a muscle also from a related group, Semimembranosus is a medial hamstring muscle located in the posterior thigh, making it a plausible choice for A. Other options in this first group have different primary locations or functions: Gracilis is a superficial medial thigh adductor, adductor magnus is primarily an anterior/medial thigh adductor with a broader actions, and Semitendinosus is another hamstring but tends to be listed alongside Semimembranosus; selecting Semimembranosus for A emphasizes its posterior-medial position.

Next, for muscle B: the options provided for the B position are Biceps Femoris, Gastrocnemius, Soleus, Popliteus, and Tibialis posterior. Among these, Biceps Femoris is the lateral hamstring muscle that crosses both the hip and knee, aligning with a posterior thigh grouping similar to A. The other options are located in the posterior leg or knee complex (Gastrocnemius and Soleus are calf muscles, Popliteus is a small muscle behind the knee but not a primary hamstring, Tibialis posterior is in the posterior tibial compartment), which makes them less consistent with pairing B as a distinct hamstring/muscle category alongside A.

Now, evaluating each alternative:
- For A, Gracilis would place A in a medial thigh adductor with a more superficial, slender role, which is less consistent with the primary posterior thigh grouping intended by the question. adductor magnus, while a thigh muscle, is primarily an adductor with anterior actions and not a classic primary hamstring; Semitendinosus is a posterior thigh muscle like Semimembranosus but is a distinct muscle, so choosing Semimembranosus clearly identifies a specific posterior-medial hamstring. 
- For B, Gastrocnemius and Soleus are plantarflexors in the calf, not typical posterior thigh muscles; Popliteus and Tibialis posterior are smaller leg muscles with actions around the knee and ankle, not the hamstring group. Biceps Femoris stands out as the lateral hamstring, aligning with the posterior thigh theme and distinct from the calf and deep knee muscles.

In summary, selecting A as Semimembranosus and B as Biceps Femoris aligns with the anatomical grouping of posterior thigh (hamstrings) muscles, while avoiding misplacement into adjacent compartments (calf or deep knee muscles).

2025FA-HES-207-001 A. Exam #3B - no lockdown

The muscle labeled A is the [ Select ] Gracilis adductor magnus Semitendinosus Semimembranosus Biceps Femoris and B is the [ Select ] Biceps Femoris Gastrocnemius Soleus Popliteus Tibialis posterior

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