Muscle Structure and Function

During muscle contraction the 'Z' Lines will...

• Disappear
• Get Farther apart
• Get Closer Together
• Appear Thicker

What part of this structure is actin #2

• Sarcomere

• thin filament

• thick filament

• z disc

• titin filament

What part of this structure is myosin #3

• Sarcomere

• thin filament

• thick filament

• z disc

• titin filament

What is the functional unit of a muscle cell? #7

• Sarcomere

• thin filament

• thick filament

• z disc

• titin filament

The skeletal muscle primary objective is to

• voluntary blood circulation

• voluntary movement

• peristalsis

• involuntary movement

Identify the structure. It binds to thin filamentous actin, and uses ATP hydrolysis to generate force and "walk" along the thin filament.

• actin

• myosin head

• tropomyosin

• troponin

• cross bridge

Cellular Respiration's goal is to

• make water

• make ATP

• make glucose

• make oxygen

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-3

How does calcium initiate muscle contraction?

• Calcium attaches to actin, allowing cross bridges to form

• Calcium causes myosin to attach to the actin protein

• Calcium causes ATP to move to myosin heads

• Calcium turns the electrical signal into a chemical signal

Anaerobic cellular respiration is termed

• glycolysis

• Krebs cycle

• ETC- electron transport pump

• Pyruvate to Acetyl CoA

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-3

This term refers to when myosin and actin contract to "pull the trigger".

• power stroke

• contraction phase

• relaxation phase

• isometric contraction