The muscle labelled A is the __
[ Select ]
rectus femoris
biceps femoris
semitendinosus
semimembranosus
vastus medialis
vastus medialis
vastus intermedius
vastus lateralis
popliteus
gastrocnemius
sartorius
gracilis
popliteus
__ and B is the __
[ Select ]
rectus femoris
biceps femoris
vastus medialis
vastus lateralis
vastus intermedius
vastus intermedius
semimembranosus
semitendinosus
gracilis
sartorius
sartorius
popliteus
gastrocnemius
__

Question

The muscle labelled A is the __
[ Select ]
rectus femoris
biceps femoris
semitendinosus
semimembranosus
vastus medialis
vastus medialis
vastus intermedius
vastus lateralis
popliteus
gastrocnemius
sartorius
gracilis
popliteus
 __ and B is the __
[ Select ]
rectus femoris
biceps femoris
vastus medialis
vastus lateralis
vastus intermedius
vastus intermedius
semimembranosus
semitendinosus
gracilis
sartorius
sartorius
popliteus
gastrocnemius
 __

BlackTom AI · Accepted Answer

The question presents a diagram-labeling task: The muscle labelled A is the __ and B is the __. The options for A and B come from a list of muscles, and the provided correct answers are semitendinosus for A and semimembranosus for B.

Option set evaluation for A (muscle A):
- semitendinosus: This is a correct posterior thigh muscle that runs medially and inserts near the tibia; it is commonly labeled among the hamstring group. If the diagram shows a muscle on the medial side of the posterior thigh or with a long slender tendon, semitendinosus is a plausible match.
- rectus femoris / vastus medialis / vastus lateralis / vastus intermedius / gastrocnemius / sartorius / gracilis / popliteus / biceps femoris / semimembranosus / other options: These muscles have distinct locations or functions that typically do not correspond to the label A in this image context. For example, rectus femoris is a superficial anterior thigh muscle; vastus group muscles are quadriceps located anteriorly; biceps femoris is lateral, etc. If the diagram emphasizes the hamstring region (posterior thigh), those alternatives would be mismatches for A.

Option set evaluation for B (muscle B):
- semimembranosus: This is a deep hamstring muscle located medially in the posterior thigh, commonly paired with semitendinosus as part of the hamstring group. It is a typical B-match if the diagram shows a deep medial posterior thigh muscle.
- other options (rectus femoris, biceps femoris, vastus medialis, vastus lateralis, vastus intermedius, gastrocnemius, sartorius, gracilis, popliteus, etc.): These either lie in the anterior compartment (e.g., rectus femoris, quadriceps muscles), lateral/posterior compartments (e.g., biceps femoris is lateral in the posterior thigh but distinct from semimembranosus in position), or are not located in the deep medial posterior thigh where semimembranosus resides. Therefore they would not be the correct match for B if the diagram is intended to identify hamstring group muscles.

Putting it together:
- The pair semitendinosus (A) and semimembranosus (B) aligns with the classic medial-to-deep posterior thigh hamstrings pairing, matching typical anatomical labeling in educational diagrams.
- The incorrect options for A would misidentify muscles not located in the expected posterior-medial thigh region, and the incorrect options for B would place a non-hamstring muscle in the B position or misplace the muscle’s deep/medial characteristics.

In summary, the selected answers semitendinosus for A and semimembranosus for B are consistent with standard hamstring anatomy and common diagram labeling, while the other options conflict with typical anatomical positioning or muscle group classifications.

2025FA-HES-207-001 C. ICQ#9B KJ/HJ no lockdown

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