Myasthenia gravis is an autoimmune disease

________ All cells have an outer covering called the cell membrane, which can allow some substances to pass into and out of the cell while denying passage of other substances

Indicate whether the statement is true or false

Horizontal spread of fire in high-rise buildings depends on:

A) floor penetration of fire and smoke through utility shafts. B) the number of subdivisions on a floor. C) the effectiveness of the HVAC system. D) penetration of fire and smoke where the floors intersect with curtain walls.