Question

station 1: how muscles are named

1. your quadriceps are a group of muscles in your thighs. what does their name tell you about them?
2. give an example of a muscle (not any from the station 1 card!!) that are named for each of the following:

a. the muscles location
b. the muscles shape
c. the muscles size
d. the direction its muscle fibers run
e. the number of origins it has
f. the location of its attachments
g. the muscles action
station 2: upper body muscles

1. identify the prime mover muscle in inspiration and explain how it works. include the name of the muscles that aid it in the inspiration process.

station 3: upper limb muscles

1. identify the main muscles involved in forearm flexion and forearm extension.

station 4: lower limb muscles

1. why does it make sense that some of the longest and most powerful muscles in the human body are located in your thighs?

Explanation:

1. The name "quadriceps" means four - headed, indicating it has four origins.

2.
a. Pectoralis major (located in the chest).
b. Deltoid (shaped like a delta).
c. Gluteus maximus (named for its large size).
d. Rectus abdominis (muscle fibers run rectally).
e. Biceps brachii (has two origins).
f. Sternocleidomastoid (attaches to the sternum, clavicle, and mastoid process).
g. Flexor carpi ulnaris (performs flexion of the wrist).

1. The prime mover in inspiration is the diaphragm. It contracts and flattens, increasing the volume of the thoracic cavity and drawing air in. Intercostal muscles aid in the process by elevating the ribs.
2. For forearm flexion, the biceps brachii is the main muscle. For forearm extension, the triceps brachii is the main muscle.
3. The thighs support the body's weight during activities like walking, running, and jumping. Long and powerful muscles in the thighs are needed to generate the force required for these movements and to maintain balance and stability.

Answer:

1. It indicates that it has four origins.

2.
a. Pectoralis major
b. Deltoid
c. Gluteus maximus
d. Rectus abdominis
e. Biceps brachii
f. Sternocleidomastoid
g. Flexor carpi ulnaris

1. Prime mover: Diaphragm. It contracts and flattens to increase thoracic - cavity volume and draw in air. Aiding muscles: Intercostal muscles.
2. Forearm flexion: Biceps brachii. Forearm extension: Triceps brachii.
3. Thighs support body weight during activities and need powerful muscles for movement and balance.