Comparing And Contracting The 3 Types Of Muscle

Question 1

Skeletal

Answer 1

Striated
Sarcomeres
Attached to bones
T-tubules and SR
No hormonal influence 
Fastest contraction speed
Not graded contraction force
Initiation of contraction from ACh, from motor neuron
Controlled by Ca2+ and troponin, fibres independent

Question 2

Smooth

Answer 2

Smooth- no striation
No sarcomeres
Walls of hollow organs, tubes and some sphincters
SR
Many hormonal influences
Slowest contraction speed
Grade contractile force
Initiation of contraction by stretch, chemical or autorythmic
Control- Ca2+ calmodulin, fibres independent, electical and linked by gap junctions

Question 3

Cardiac

Answer 3

Striated
Sarcomeres
Heart muscle
T-tubules and SR
Epinephrine
Intermediate contractile speed
Graded force
Autorythmic initiation
Control- Ca2+ troponin, fibres independent, electrically linked by gap junctions