Smooth muscles are 

(1) involuntary, fusiform, non-striated

(2) voluntary, multinucleate, cylindrical

(3) involuntary, cylindrical, striated

(4) voluntary, spindle-shaped, uninucleate

Smooth muscles occur on

(1) viscera

(2) internal organs

(3) blood vessels

(4) all the above

Intercalated discs are characteristic of muscles found in 

(1) heart

(2) thigh

(3) urinary bladder

(4) stomach

Which of the following statements is correct about the cardiac muscles?

I. It is present in heart only

II. The plasma membranes of adjacent cardiac cells interlock at intercalated disc

III. The intercalated disc contains desmosome (adhering and gap junction)

IV. Gap junctions allow the cardiac cells to contract as a unit

(1) All are correct

(2) None of these

(3) II and IV only

(4) I and II only

Muscles of intestine and blood vessels are:

(1) Involuntary and smooth

(2) Voluntary and smooth

(3) Involuntary and striated

(4) Voluntary and striated