The Living World 8th Edition by George Johnson

تمرين 7

The type of muscle used to move the leg when walking is
A) skeletal.
B) cardiac.
C) smooth.
D) All of the above.
The three types of muscle all share
A) a structure that includes striations.
B) a membrane that is electrically excitable.
C) the ability to contract.
D) the characteristic of self-excitation.
Why would your heart not function well if constructed of skeletal muscle? What is the particular characteristic of cardiac muscle that is key to proper heart function?