PHYSIOLOGY
MUSCLE CONTRACTION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
If made an analogy of actin and myosin molecules which would best describe the connection?
|
|
myosin as a male and actin as a female
|
|
|
myosin as a key and actin as a lock
|
|
|
mysoin as the bolt and actin as the nut
|
|
|
all describe the action of the molecules
|
Explanation:
Detailed explanation-1: -A person standing between two bookcases (z bands) pulls them in via ropes (actin). Myosin (M) is analogous to the person and the pulling arms.
Detailed explanation-2: -The globular heads of myosin bind actin, forming cross-bridges between the thick and thin filaments. It is important to note that the orientation of myosin molecules in the thick filaments reverses at the M line of the sarcomere.
Detailed explanation-3: -Cross-bridge theory states that actin and myosin form a protein complex (classically called actomyosin) by attachment of myosin head on the actin filament, thereby forming a sort of cross-bridge between the two filaments.
There is 1 question to complete.