Which of the following is not a function of the sympathetic nervous system?

Consider the following events in muscle contraction: 

I. Action potential depolarizes the T-tubules.

II. Calcium binds to troponin tropomyosin complex.

III. Action combines with myosin ATP leading to cross-bridge activation.

IV. Depolarization of T-tubules releases calcium from the sarcoplasmic reticulum.

What is the correct sequence of the above?

Consider the following statements: 

I. The oesophagus passes the food to the stomach.

II. Stomach secretes HCI to digest the food.

Which of the following statements is/are true?

Consider the following two statements about respiration:

I. Respiration uses the lungs for the exchange of gases.

II. Lungs are situated within the cage of ribs.

Which of the above statements are true?

Consider the following statements about transportation in human:

I. Left atrium contains blood with ${\mathrm{CO}}_2$. 

II. Right ventricle contains blood with ${\mathrm{O}}_2$. 

Which of the above statement/s is/are correct?