ExPhys Ch. 5 Vocab - 3rd Set

The meeting point of each sarcomere

• A) A band

• B) Capillaries

• C) Z line

• D) H zone

The structural unit of myofibril composed of actin and myosin filaments between two Z-lines

• Myosin

• Actin

• Sarcomere

• Myofibrils

Protein-based molecule that carries oxygen molecules into the muscles

• Hemoglobin

• Uric Acid

• Myoglobin

• Glycogen

The series of steps in muscle contraction involving how myosin and actin filaments slide past one another to produce a muscle contraction, shortening the entire length of the sarcomere.

• Muscle contraction theory

• Strength of the stimulus

• Size of the motor units stimulated

• Sliding filament theory

Glucose that is deposited and stored in bodily tissues, such as the liver and muscle cells; the storage form of carbohydrate.

• Glycogen

• Myoglobin

• Vacuoles

• Chitin

A high-energy molecule that serves as the main form of energy in the human body; known as the energy currency of the body.

• Deoxyribonucleic acid (DNA)

• Lactic acid

• Glycogen

• Adenosine triphosphate (ATP)

Connective tissue surrounding a muscle fascicle

• Myosin

• Endomysium

• Permysium

• Type II Muscle Fibers

Inner layer of fascia that directly surrounds an entire muscle, commonly referred to as the "deep fascia"

• Endomysium

• Epimysium

• Sarcomere

• Myosin

Muscle fibers that are larger in size, generate higher amounts of force, and are faster to fatigue

• Glycogen

• Type II fast twitch

• Type II muscle fibers

• Visceral muscle

The length of a muscle when it is not actively contracting or being stretched.

• Extended length

• Optimum length

• Maximal length

• Resting length