Question

I am not sure if the ones that I did answer were correct and wanted to make sure.

Answer the following questions about the anatomy of muscle:

1. Combination of myofilaments lead to formation of ______________________
2. Myosin is the make-up of the ______thick______________ filament, while actin protein is the make-up of _______thin_____________ filament  
3. Plasma membrane of muscles are known as ______sarcolemma_____________________
4. Sarcolemma dips down into the cell to produce tube like structures known as _____________________
5. Connective tissue that wraps around multiple muscle fibers is known as _________________________ producing a structure known as ____________________________.
6. Connective tissue that wraps around individual muscle fibers is known as __________________________.
7. Myofibrils are combined together to form ________________________
8. Endoplasmic reticulum in muscle fibers is known as ___________________________
9. Two types of myofilaments are:
   1. __Thick_________ filament which is made up of ________myosin_______ protein
   2. ____Thin_______ filament which is made up of ___actin, tropomyosin, and & troponin_____ protein
10. Myosin + actin filaments are combined to form _________________________
11. Vertical division of myofibrils are called ___Z-line__________________
12. Contractile portion of muscle fibers is called _____sarcomere________.
13. _Sarcoplasmic reticulum______ structure of muscle fiber is responsible for storage of calcium.

Answer 1

a.Combination of myofilaments lead to formation of myofibrils.

b.Myosin is the make-up of the thick filament, while actin protein is the make-up of thin filament  

c.Plasma membrane of muscles are known as sarcolemma

d.Sarcolemma dips down into the cell to produce tube like structures known as transverse tubules (T tubules)

e.Connective tissue that wraps around multiple muscle fibers is known as perimysium producing a structure known as fascicles.

f.Connective tissue that wraps around individual muscle fibers is known as endomysium

g.Myofibrils are combined together to form muscle fibre.

h.Endoplasmic reticulum in muscle fibers is known as sarcoplasmic reticulum

i.Two types of myofilaments are: Thick filament which is made up of myosin protein

Thin filament which is made up of actin, tropomyosin, and & troponin protein

j.Myosin + actin filaments are combined to form myofibrils.

k.Vertical division of myofibrils are called Z-line.

l. Contractile portion of muscle fibers is called sarcomere.

m. Sarcoplasmic reticulum structure of muscle fiber is responsible for storage of calcium.

EXPALANATION :

Each muscle is made up of fascicles.

Each fascicle is made up of muscle fibres

Each muscle fibre is made up of myofibrils

Each myofibril is made up of myofilaments.

Myofilaments are actin and myosin