Muscle/ Muscle cells

Question 1

What are muscles made up of?

Answer 1

Bundles of cells called muscles fibres

Muscles fibres and made of myofibrils

Question 2

What are sarcomeres?

Answer 2

Sarcomeres are repeated units of actin and myosin filaments.

Question 3

The actin is made of ____ ________

Answer 3

Thin filaments

Question 4

The myosin is made of _____ __________

Answer 4

Thick filaments

Question 5

How muscle contraction occurs

Answer 5

Muscle contraction occurs when the thin actin filaments move between the thick myosin filaments, shortening the length of the sarcomere.

-The myosin uses its myosin heads to join with the actins active sites and pull the actin towards the middle line of the sarcomere.

Question 6

What is the edge of the cell called that separates sarcomeres?

Answer 6

Z line

Question 7

What is the area that consists only of thin actin filament called?

Answer 7

I band

Question 8

What is the area called that consists only of thick myosin filament called?

Answer 8

H zone

Question 9

What is the area of overlapping thick and thin filament called?

Answer 9

A band