Question

Which of the following muscles cause "flexion" of some body segment to occur?

Biceps brachii
Flexor digitorum superficialis
Rectus abdominis
Iliopsoas (Iliacus & Psoas muscles)
Flexor hallucis longus
Biceps femoris
a) 1, 2, 4, 5
b) 3, 4, 6, 2
c) 2, 5, 1, 3
d) 4, 6, 2, 1

Answer 1

The muscles that cause flexion and thus decrease the angle between bones, such as the biceps brachii and the iliopsoas group, include the biceps brachii, flexor digitorum superficialis, iliopsoas, and flexor hallucis longus. Therefore, the correct answer is option a) 1, 2, 4, 5.

Step-by-step explanation:

The muscles that cause flexion of some body segment are the biceps brachii, flexor digitorum superficialis, iliopsoas (iliacus & psoas muscles), and flexor hallucis longus. These muscles work by decreasing the angle between bones, effectively closing the limb or bending a joint. During muscle contraction, these muscles contract to pull on the bones and create movement. For instance, the biceps brachii is the flexor muscle that allows you to bend your elbow, and the iliopsoas group is responsible for flexing the thigh at the hip.

According to this understanding, the flexor muscles that cause flexion of some body segment in question are:

1. Biceps brachii
2. Flexor digitorum superficialis
3. Iliopsoas (iliacus & psoas muscles)
4. Flexor hallucis longus

Hence, the correct answer would be option a) 1, 2, 4, 5.