Life Processes ...

Site of actual diffusion of $$O_{2}$$ and $$CO_{2}$$ is  ______________.

Consider the following statements: 
1. The force that blood exerts force against the wall of a vessel is called blood pressure. 
2. The pressure of blood inside the artery during contraction is called systolic pressure and pressure in an artery during relaxation is called diastolic pressure. 
3. Blood pressure is measured with an instrument called sphygmomanometer.
Which of the statements given above are correct?

Arrange the following events in correct sequence, starting immediately after deoxygenated blood has entered in the heart.

The two lower chambers of the heart are called ________.

Choose the correct alternative in the following statements.
Pulmonary vein carries:

Read the following statements:
(A) Nasal chamber opens into the nasopharynx which is a portion of the pharynx.
(B) Larynx produces sound during inspiration as well as expiration.
(C) During swallowing gullet can be covered by a thin elastic cartilaginous flap called epiglottis.
(D) Trachea is get divided at the level of the 6th thoracic vertebra into right and left primary bronchi..
(E) The branching network of bronchi, bronchioles, and alveoli comprise the lungs.
How many statements are not correct?

The specific function of light energy in the process of photosynthesis is to:

During photosynthesis, the oxygen in glucose comes from

Which one chemical reaction occurs during photosynthesis?

Choose the correct answers from the alternatives given.
With regard to natural eating habits, a human is: