1.
ID the muscle labeled "A".
Correct Answer
A. Sartorius
Explanation
The correct answer is Sartorius. The Sartorius muscle is a long, thin muscle that runs down the length of the thigh. It originates from the anterior superior iliac spine and inserts onto the medial surface of the tibia. It is responsible for flexing, abducting, and externally rotating the hip joint, as well as flexing the knee joint. It is the longest muscle in the human body and is often referred to as the "tailor's muscle" because it is used when crossing the legs in a sitting position, resembling the position of a tailor.
2.
This muscle originates at the symphysis of the ischium and the pubis and inserts on a thin aponeurosis on the medial surface of the tibia and continues with the fascia of the shank:
Correct Answer
C. Gracilis
Explanation
The correct answer is Gracilis. The Gracilis muscle originates at the symphysis of the ischium and the pubis and inserts on a thin aponeurosis on the medial surface of the tibia and continues with the fascia of the shank.
3.
The muscle labeled "E" abducts the thigh and flexes the shank. This muscle is known as the __________ __________ (2 words).
Correct Answer
biceps femoris
Explanation
The muscle labeled "E" is responsible for abducting the thigh and flexing the shank. This muscle is called the biceps femoris.
4.
What is the origin of the biceps femoris muscle?
Correct Answer
B. Ischial tuberosity
Explanation
The biceps femoris muscle originates from the ischial tuberosity. The ischial tuberosity is a bony prominence located at the base of the pelvis. This muscle plays a role in flexing the knee joint and extending the hip joint.
5.
The semitendinosus inserts into the _______ . (which bone?)
Correct Answer
tibia
Explanation
The semitendinosus muscle inserts into the tibia bone. This means that the tendon of the semitendinosus attaches to the tibia, specifically at the medial (inner) aspect of the bone. The semitendinosus is one of the three hamstring muscles located at the back of the thigh and plays a role in knee flexion and hip extension. Its insertion at the tibia allows it to contribute to the movement and stability of the knee joint.
6.
What is the action of the muscle labeled "A"?
Correct Answer
D. Extends the thigh
Explanation
The muscle labeled "A" is responsible for extending the thigh. This means that it is involved in moving the thigh backward, away from the body. It does not perform any other actions such as adducting the thigh (bringing it towards the midline of the body), abducting the thigh (moving it away from the midline), or flexing the shank (bending the lower leg). The specific function of this muscle is to extend the thigh.
7.
The adductor femoris, labeled "B" in the picture, inserts into the ________. (which bone?)
Correct Answer
femur
Explanation
The adductor femoris muscle, labeled "B" in the picture, inserts into the femur bone. This means that the muscle attaches to and ends at the femur bone.
8.
ID the muscle labeled "D". (three words)
Correct Answer
tensor fascia latae
Explanation
The muscle labeled "D" is the tensor fascia latae.
9.
Of the four choices, which three help to make up the quadriceps complex?
Correct Answer(s)
A. Vastus medialis
C. Vastus lateralis
D. Rectus femoris
Explanation
The quadriceps complex is made up of four muscles, namely the vastus medialis, vastus lateralis, rectus femoris, and vastus intermedius. However, the question asks for the three choices that help make up the quadriceps complex. Therefore, the correct answer is vastus medialis, vastus lateralis, and rectus femoris. These three muscles work together to extend the knee joint and are important for movements such as walking, running, and jumping.
10.
ID the most medial of the quadriceps muscles, labeled "D".
Correct Answer
A. Vastus medialis
Explanation
The most medial of the quadriceps muscles is the Vastus medialis. This muscle is located on the inner side of the thigh and is responsible for extending the leg at the knee joint. It helps in stabilizing the patella (kneecap) and plays a crucial role in maintaining proper alignment of the leg during movements.
11.
This muscle originates at the proximal end of the tibia and the fibula and is involved in flexin the pes: ___________ ___________ (two words)
Correct Answer
tibialis cranialis
Explanation
The tibialis cranialis muscle originates at the proximal end of the tibia and the fibula. It is involved in flexing the pes.
12.
Choose the correct action of the muscle labeled "A".
Correct Answer
C. Flexes and medially rotates the leg
Explanation
Muscle A is responsible for flexing and medially rotating the leg. This means that it helps to bend the leg at the knee joint and rotate it inward towards the midline of the body. The muscle is not involved in extending the pes or flexing the toes, as mentioned in the other options. Therefore, the correct action of muscle A is to flex and medially rotate the leg.
13.
The tibialis caudalis, labeled "C" in the picture, lies between which two muscles? (choose both muscles)
Correct Answer(s)
A. Flexor digitorum longus
D. Flexor hallucis longus
Explanation
The tibialis caudalis lies between the flexor digitorum longus and flexor hallucis longus muscles.
14.
The gastrocnemius muscle, which comprises most of the bulky posterior muscle mass of the shank, is commonly known as the ________ muscle.
Correct Answer(s)
calf
Explanation
The gastrocnemius muscle is commonly known as the calf muscle. It is located in the posterior region of the shank and contributes to the bulkiness of the lower leg. The term "calf" is often used to refer to this specific muscle due to its prominence and importance in activities such as walking, running, and jumping.
15.
The action of the muscle labeled "A" is to ______ the pes.
Correct Answer
C. Extend
Explanation
The muscle labeled "A" is responsible for extending the pes. This means that it causes the pes to move away from the body or to straighten.
16.
The soleus muscle is located beneath the _________ muscle.
Correct Answer
plantaris
Explanation
The soleus muscle is located beneath the plantaris muscle.
17.
The action of the gluteus maximus is to:
Correct Answer
B. Abduct the thigh
Explanation
The gluteus maximus is the largest muscle in the buttocks, and its main action is to abduct the thigh. Abduction refers to moving a body part away from the midline of the body. In the case of the thigh, it means moving the leg away from the center of the body. The gluteus maximus is responsible for this movement, allowing us to move our legs laterally.
18.
ID the muscle labeled "A".
Correct Answer
gluteus medius
Explanation
The muscle labeled "A" is the gluteus medius.
19.
The gluteus medius has the same insertion point as the:
Correct Answer
D. Gluteus maximus
Explanation
The gluteus medius and gluteus maximus are both muscles in the buttocks region. They have similar insertion points, meaning they both attach to the same location in the body. Therefore, the correct answer is gluteus maximus.
20.
ID the muscle labeled "B".
Correct Answer
soleus
Explanation
The muscle labeled "B" is the soleus.