Muscular System: Lecture

This type of muscle tissue is found only in the heart

• Skeletal
• Cardiac
• Smooth

This type of muscle tissue is found in the walls of hollow organs such as the stomach 

• Skeletal
• Cardiac
• Smooth

This type of muscle tissue is attached to bones wand helps control voluntary movement

• Skeletal
• Cardiac
• Smooth

Voluntary muscle is described as...

• ...smooth muscle

• ...being located in the middle layer of the blood vessels

• ...under conscious control

• ...the muscle found in the heart

Which type of muscle fiber is shown in the picture?

• Cardiac

• Smooth

• Skeletal

What is the name of the following characteristic: the ability to recoil and resume the original resting length

• Excitability

• Contractility

• Extensibility

• Elasticity

What is the name of the following characteristic: the ability to receive and respond to stimuli

• Excitability

• Contractility

• Extensibility

• Elasticity

Skeletal muscles consist of numerous _____________ that contain a bundle of _______________ which are composed of repeating contractile units called _____________?

• muscle fibers, sarcomeres, myofibrils

• sarcomeres, muscle fibers, myofibrils

• sarcomeres, myofibrils, muscle fibers

• muscle fibers, myofibrils, sarcomeres

The thin filament composed of protein in a myofibril is called?

• Actin

• Myosin

The second step in a muscle contraction is?

• Actin and Myosin slide past eachother

• Calcium ions are released

• Action potential or a stimulus reaches a muscle fiber