I.Read each of the following questions. Write your answer on the space provided before each number.

_____1. What organ is responsible for the distribution of blood in the body?
a. Blood vessels b. Liver c. Heart d. Lungs

_____2. As the body performs various activities, it gets tired and worn out. What organs tells the body to rest and recharge?
a. Heart b. Brain c. Liver d. Lungs

_____3. Which correctly describes the function of the blood?
a. It is the life of an organism.
b. It distributes the nutrients and gases to the different parts of the body.
c. It enables the body to digest food.
d. It absorbs the food fully.

_____4. What substance is secreted by the stomach to help digest food?
a. Gastric juice b. Pepsin c. Carbon dioxide d. Acid

_____5. What would happen if the kidneys are no longer capable of eliminating waste products in the body?
a. Human waste will stay in the body and might poison the organs.
b. It will have no effect in the body because other organs can also eliminate waste.
c. The kidney will still be healthy.
d. The organs in the body will not be affected.

_____6. What is the best way of taking care of your organs?
a. Eat everything you want.
b. Live healthy and eat healthy.
c. Stay late at night.
d. Drink all sorts of beverages.

_____7. Why are lungs important?
a. They enable you to inhale oxygen and exhale carbon dioxide.
b. They contain alveoli, which are the air sacs.
c. They can store up to five liters of air.
d. All of the above.


_____8. Which organ in the body can be best compared to a pail where urine water can be stored and released when needed?
a. Stomach c. Small intestine
b. Urinary bladder d. Pancreas

_____9. Gastric juice is an acid secreted by the stomach. It is almost similar to hydrochloric acid, one of the substances used in manufacturing dyes, fertilizers, and other chemicals. What is the gastric juice for?
a. It is responsible for breaking down food.
b. It helps digest the food taken in by the organism.
c. It is an acid that helps in breaking down food in the stomach.
d. All of the above.

_____10. Among the organs in the body, the brain is considered one of the most important. Which of the following best describes the function of the brain?
a. It controls all bodily activities and functions.
b. It stimulates the production of blood.
c. It facilitates the elimination of wastes.
d. It regulates blood pressure.