F25 Muscle Physiology Notes Check

Match the muscle type with it's description

• skeletal muscle

• branched, generates the heartbeat

• cardiac muscle

• arranged in uniform layers, propels body fluids and food

• smooth muscle

• long and cylindrical provides muscle tone and generates heat

Organize the structure of skeletal muscle from the largest (1) to smallest unit (5)

• Myofibril

• Fascicle

• Muscle Fiber

• Muscle

• Myofilament

Muscle fibers contain the thick filament ___ and the thin filament____

• actin, myosin
• myosin, actin
• myosin, troponin
• tropomyosin, actin

Skeletal muscles are bundled together in units called fascicles which are connected to bones via

• perimysium
• tendons
• actin
• endomysium

This is the structural and functional unit of a muscle contraction

• sarcomere

• fascicle

• tendon

• sarcoplasmic reticulum

Select the regions that represent the Z-lines.

Select the regions that represent the H zone.

Select the region that represents the I band

Select the region that represents the A band

The connection or space between a motor nerve and a muscle fiber is called a

• neuromuscular junction
• motor end plate
• axon
• sliding filament