Muscular System and Muscle Types

These flashcards are designed to help review key concepts related to the muscular system, including types of muscle tissue, characteristics, and functions.

What is the percentage of body weight made up of muscle in males?

40% of body weight.

What is the percentage of body weight made up of muscle in females?

32% of body weight.

What type of muscle is exclusively found in the heart?

Cardiac muscle.

What are the characteristics of smooth muscle?

Narrow cylindrical fibers, nonstriated, uninucleate, involuntary.

What type of muscle fibers are found in cardiac muscle?

Striated, branched, generally uninucleated.

What is the function of skeletal muscles?

Help maintain posture, provide movement and heat, protect underlying organs.

What are some ways skeletal muscles are named?

By size, shape, location, direction of fibers, and number of attachments.

What is the largest buttock muscle called?

Gluteus maximus.

What shape is the deltoid muscle?

Triangular.

What does the term 'rectus' refer to in the rectus abdominis muscle?

Straight.

What are intercalated disks?

Structures that join cardiac muscle cells together.

What is the function of gap junctions in cardiac muscle?

Allow cells to stimulate the next one.

What type of muscle is voluntary?

Skeletal muscle.

What are muscle fibers packed with?

Myofibrils which contain proteins actin and myosin.

What is a fascicle in muscle anatomy?

A bundle of muscle fibers wrapped with connective tissue (fascia).