muscle tissue and contraction

what are the 3 types of muscle tissue

• skeletal

• smooth

• cardiac

• connective

which of these describe skeletal tissue

• moves the skeleton at the joints and work in antagonistic pairs

• attached to, support and move the skeleton

• allow hollow organs to contract

• found in the digestive system

skeletal tissue is...

• voluntary

• involuntary

which of these describe smooth muscle tissue

• found in digestive system (only one of the locations)

• allow hollow organs to contract

• specialized muscle found in the heart oly

• attached to, support and move the skeleton

what are the segments that make up myofibrils called

• sarcomere

• actin

• acetylcholine

• tropomyosin

what is the name of the thin, protein filament

• sarcomere

• actin

• acetylcholine

• tropomyosin

what causes calcium to be released in the first stage

• sarcomere

• actin

• acetylcholine

• tropomyosin

which protein changes shape to reveal binding sites

• sarcomere

• actin

• acetylcholine

• tropomyosin

what is the power stroke

• myosin heads pulling on the actin

• myosin heads pulling on the sarcomere

• myosin heads pulling on the acetylcholine

• myosin heads pulling on the tropomyosin

what describes fast muscle fibers

• very quick and powerful, with densely packed fibres

• contract slowly but keep going for a long time