A) Myofibril
B) Sarcolemma
C) Sarcoplasmic reticulum
D) Terminal cisterna
E) Transverse tubule

A) Cardiac muscle contains triads while skeletal muscle contains diads
B) Sarcomere structure in smooth muscle and cardiac muscle are the same
C) Skeletal muscle thin filaments have actin, troponin, and tropomyosin; smooth muscle lacks troponin
D) Skeletal muscles consume more energy than cardiac muscle as a result of the abundance of mitochondria
E) T-tubule diameter in smooth muscle is smaller than in cardiac muscle

A) Shortening of A-band
B) Shortening of H-zone
C) Shortening of I-band.
D) Thin filaments slide toward M-line
E) Z-lines move closer together