Muscles P 1

Muscles makes up nearly half of t he body's mass

• True

• False

Muscle tissue is composed of __________ cells that specialized to contract.

• connective
• epithelial
• shortened

• elongated

Muscle cells are so long they are called _____ _____

• muscle fibers
• muscle tissues
• muscle cells
• muscle strands

Muscles contract by transforming the chemical energy of ___ into mechanical energy.

• Glucose
• ATP
• Creatine
• Lactate

What are the 3 types of muscle?

• Cardiac, Striated, Non-striated
• Voluntary, Involuntary, Cardiac
• Skeletal, Cardiac, Smooth
• Skeletal, Elastic, Smooth

What characterizes skeletal muscle?

• attaches to and moves the skeleton or skin

• also called striated and voluntary

• cells are multinucleate, cylindrical, and very long

• makes up the walls of the heart

• called striated, but involuntary

What characterizes cardiac muscle?

• attaches to and moves the skeleton or skin

• also called striated and voluntary

• the cells are uninucleate and branch; they fit tightly together via intercalated discs(include gap junctions)

• makes up the walls of the heart

• called striated, but involuntary

What characterizes smooth muscle?

• attaches to and moves the skeleton or skin

• also called striated and voluntary

• occurs in the walls of hollow organs like the stomach, intestines, arteries

• unstriated and involuntary

• cells are uninucleate and spindle shaped

What are functions of muscle

• produces movement by contracting

• maintains posture

• stabilizes joint

• generates heat

• protection

What are functions of muscle

• produces movement by contracting

• maintains posture

• stabilizes joint via muscle tone

• generates heat

• protection