The muscle labeled A is the
[ Select ]
Rectus Femoris
Vastus Medialis
Gracilis
Sartorius
one of the Uni-Articular Adductors
vastus lateralis
and the muscle labeled B is the
[ Select ]
Rectus Femoris
Vastus Medialis
Gracilis
Sartorius
one of the Uni-Articular Adductors
.

Question

The muscle labeled A is the 
[ Select ]
Rectus Femoris
Vastus Medialis
Gracilis
Sartorius
one of the Uni-Articular Adductors
vastus lateralis
 and the muscle labeled B is the 
[ Select ]
Rectus Femoris
Vastus Medialis
Gracilis
Sartorius
one of the Uni-Articular Adductors
 .

BlackTom AI · Accepted Answer

The question asks you to identify the muscles labeled A and B, choosing from the given muscle options.

Option set reviewed: Rectus Femoris, Vastus Medialis, Gracilis, Sartorius, one of the Uni-Articular Adductors, vastus lateralis. These are the only possibilities you have to map to A and B.

Analysis for A:
- Rectus Femoris: this muscle runs straight down the front of the thigh and is one of the quadriceps; it spans both the hip and knee joints (biarticular), but the question’s pairing (A with Sartorius in the provided solution) suggests A is not Rectus Femoris. 
- Vastus Medialis: another quadriceps muscle on the medial thigh; it is a knee extensor only (not crossing the hip), so it would not fit A if A is intended to be Sartorius in the supplied answer set. 
- Gracilis: a medial thigh muscle that also crosses the knee; it is not commonly labeled as the A choice paired with Sartorius in typical anatomy identifications. 
- Sartorius: a long, strap-like muscle that runs obliquely across the thigh from the ASIS to the pes anserinus; while it is biarticular (hip and knee), it is a distinct superficial medial thigh muscle often used as a key label in such matching questions. Given the provided answer sequence (A = Sartorius), this aligns with the expected mapping. 
- one of the Uni-Articular Adductors: this option would pick out a muscle that crosses only the hip joint; however, Sartorius is not a uni-articular adductor, and the supplied answer indicates A is Sartorius rather than a uni-articular adductor. 
- Vastus Lateralis: a quadriceps muscle on the lateral thigh; it is a knee extender and does not fit A if the expected answer is Sartorius.

Conclusion for A: The correct choice for A is Sartorius because the mapping in the provided answer uses Sartorius for A, and the other options do not fit the typical label that pairs with Sartorius in this kind of dropdown question.

Analysis for B:
- Rectus Femoris: as above, not a typical match for B when A is Sartorius; it also crosses both joints, and pairing it with B would be inconsistent with a likely intended gendered or positional pairing shown in the answer key. 
- Vastus Medialis: part of the quadriceps; this is a knee extensor and does not pair with Sartorius in common labeling schemes for this kind of question. 
- Gracilis: a medial thigh muscle that does cross the hip and knee; in many anatomy questions it is used as a target option for B when A is Sartorius due to its relative location in the medial thigh and its functional profile as an adductor/assist in knee flexion. Since the provided answer places Gracilis at B, this matches the expectation. 
- Sartorius: since A is Sartorius, B would not be Sartorius in a single question; thus this option would be incorrect for B given the established mapping. 
- one of the Uni-Articular Adductors: would imply a hip-only adductor; Gracilis is not uni-articular, and the option would not align with the chosen B. 
- Vastus Lateralis: again not matching the B position with Gracilis in this mapping.

Conclusion for B: The correct choice for B is Gracilis because the answer key indicates this mapping, and Gracilis fits the location/function pairing opposite Sartorius in the medial thigh context.

Summary of why the provided mapping is correct:
- A = Sartorius corresponds to the first dropdown option in the intended answer set, aligning with common anatomy labeling where Sartorius is a distinct anterior thigh muscle often selected in similar fill-in questions. 
- B = Gracilis corresponds to the second dropdown option and fits the medial thigh adjacency and function, making it the sensible opposite to Sartorius in this question’s design.

Notes on why other options are not chosen for A or B in this mapping:
- Rectus Femoris and Vastus Lateralis would not typically be paired with Sartorius in a two-answer setup emphasizing a contrast between a lateral/ anterior muscle and a medial thigh muscle. 
- The Uni-Articular Adductors option would imply a hip-only adductor, which does not align with the Sartorius-Gracilis pairing used here. 
- Selecting Sartorius for both A and B would be redundant and contradict the provided answer mapping.

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

The muscle labeled A is the [ Select ] Rectus Femoris Vastus Medialis Gracilis Sartorius one of the Uni-Articular Adductors vastus lateralis and the muscle labeled B is the [ Select ] Rectus Femoris Vastus Medialis Gracilis Sartorius one of the Uni-Articular Adductors .

View Explanation

Log in for full answers

Similar Questions

The muscle below is brachialis , this muscle flexes the elbow joint.

One action of the teres major is extension . This muscle is considered to be both posterior and inferior relative to the muscle's LOA (Line Of Action)

The muscle labelled #1 is the [ Select ] spleneus capitis Splenius cervicis Sternocleidomastoid Erector spinae and the muscle labelled #2 is the [ Select ] Rectus abdominis External oblique Internal oblique Quadratus lumborum .

The muscle labeled A is the [ Select ] Gluteus Maximus Gluteus Medius Gluteus Minimus Tensor Fascia Latae Sartorius and B is the [ Select ] Tensor Fascia Latae Sartorius Gluteus Medius Vastus Medialis

The muscle colored blue in the illustration above (from Visible Body) is the right Splenius capitis muscle. This muscle does the action of lateral flexion to the right (when concentrically contracting). (note this muscle is a neck muscle that attaches on the base of the skull)

The tibialis posterior muscle:

Question at position 15 Which of the following muscles does not belong with the others?Flexor hallucis longusGastrocnemiusSoleusExtensor hallucis longusTibialis posterior

More Practical Tools for Students Powered by AI Study Helper

Homework AI Solver

Stylized AI Paper Writer

Plagiarism Checker Assistant

Citation AI Academic Writing Tool

In-Class Translation Assistant

AI Note Generator

AI Quiz Answers

Past Exam Questions from University Test Bank

Smart Practice Assistant

Adaptive Practice

Making Your Study Simpler