PHYSIOLOGY
SYNAPTIC PHYSIOLOGY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
one Z line to the next Z line
|
|
|
one H zone to the next H zone
|
|
|
one A band to the next A band
|
|
|
one end of a skeletal muscle to the opposite end
|
Detailed explanation-1: -A sarcomere is the region from one Z line to the next Z line. Many sarcomeres are present in a myofibril, resulting in the striation pattern characteristic of skeletal muscle. Myofibrils are composed of smaller structures called myofilaments .
Detailed explanation-2: -The correct option is C one Z line to the next Z line.
Detailed explanation-3: -The area between two Z lines, a sarcomere, can be considered to be the primary structural and functional unit directly responsible for muscle contraction.…
Detailed explanation-4: -The Sarcomere. A sarcomere is defined as the region of a myofibril contained between two cytoskeletal structures called Z-discs (also called Z-lines or Z-bands), and the striated appearance of skeletal muscle fibers is due to the arrangement of the thick and thin myofilaments within each sarcomere (Figure 10.2.
Detailed explanation-5: -The Z-band (or Z-disk) is a dense fibrous structure made of actin, -actinin, and other proteins. Thin filaments (or actin filament) are anchored at one end at the Z-band. Titin is anchored to both the Z-band and the M-line. Thick filaments are anchored in the middle of the sarcomere at the M-line.