Muscular System 2

What type of muscle is this?

• Skeletal

• Cardiac

• Smooth

Which type of muscle is this?

• Smooth

• Skeletal

• Cardiac

Which type of muscle is this?

• Skeletal

• Cardiac

• Smooth

Which type of muscle cell has one nucleus, is striated and has intercalated disks?

• Skeletal

• Cardiac

• Smooth

Which type of muscle cell is striated, voluntary and has multiple nuclei located at the periphery?

• Cardiac

• Smooth

• Skeletal

Which of the following muscle cells are not striated, involuntary, and have one nucleus per cell?

• Skeletal

• Cardiac

• Smooth

Which of the following puts the structures of the muscle in order from largest to smallest?

• Whole muscle, muscle fiber, actin & myosin, myofibril, muscle fasicle

• Whole muscle, muscle fasicle, muscle fiber, myofibril, actin & myosin

• Whole muscle, muscle fiber, muscle fasicle, myofibril, actin & myosin

• Whole muscle, muscle fasicle, muscle fiber, actin & myosin, myofibril

When bending down into a squat, the angle at the knee joint decreases. This is an example of

• extension

• flexion

• adduction

• abduction

The thin filaments in a muscle fiber are _____ and the thick filaments are ____.

• troponin; tropomyosin

• tropomyosin; actin

• actin; myosin

• myosin; actin

Once calcium binds to a binding site in the thin filament, the _______ head is able to bind and to initiate a power stroke.

• ATP

• actin

• Z line

• myosin