Transverse tubules. - tubules formed by invaginations of the sarcolemma and flanked by the sarcoplasmic reticulum, they carry action potentials deep into the muscle fiber. T tubules and SR provide tightly linked signals for muscle contraction. T tubules at each A band/I band junction-continuous with the sarcolemma.
Standard Sizes of Sofas. Sofas vary in size, from 6 to 8 feet long and 32 to 40 inches deep for a standard size sofa, to 4 to 6 feet long and 28 to 30 inches deep for a loveseat.The actual depth of the seating area is reduced by the depth of the sofa's arms and back of the sofa.ofas vary in size, from 6 to 8 feet long and 32 to 40 inches deep for a standard size sofa, to 4 to 6 feet long and 28 to 30 inches deep for a loveseat.
Occasional Chair: Should provide a more relaxed, reclining position than a dining chair - seat height is lower (about 16). Armrests are recommended for easy in/out and they average 5 to 8 in height and 2 to 4 in width. Sofa/Loveseat: The seat height ranges from 16 to 18â. The seat back typically rises 15 to 18 above the seat. Armrests generally protrude 4 to 8 above seat. The overall width of a loveseat is about 56 to 60 - 24 per person, plus 4 to 6 for each armrest.