Q2-SCIENCE-4-LIVING THINGS AND THEIR ENVIRONMENT

1.    How many bones does humans have?

• 206

• 306

• 106

• 406

Answer explanation

The adult human skeleton is made up of 206 bones. These include the bones of the skull, spine (vertebrae), ribs, arms and legs.

2. 2. What is the Latin word of “cerebellum”?

• Little story

• Little health

• Little brain

• Little heart

Answer explanation

Cerebrum means brain in Latin. "Cerebellum" is the diminutive, meaning “little brain”.

3. 3. What do you call the organ that untiringly pumping blood throughout the body to keep humans alive?

• Heart

• Brain

• Muscles

• Intestines

Answer explanation

Heart- this muscular organ pumps blood throughout your body. Your heart is the only circulatory system organ. Your lungs are part of your respiratory system.

4. 4. What do you call the major organs of the respiratory system located at the center of the chest?

• Gallbladder

• Liver

• Lungs

• Heart

Answer explanation

Your lungs are on each side of your heart, inside your chest cavity. They are the main organs of the respiratory system. The right lung is divided into three lobes (sections), and the left lung is divided into two lobes.

5. 5. Body part that is J-shaped, muscular, and hollow organ at the end of the esophagus. It can store two liters of food for about four hours on the average.

• Intestines

• Liver

• Heart

• Stomach

Answer explanation

The stomach is a J-shaped organ in the upper belly (abdomen). It's part of the digestive system.

6. 6. The process of removing undigested food from the body is called __________?

• Defecation

• Duplication

• Deletion

• Donation

Answer explanation

The food molecules that cannot be digested or absorbed need to be eliminated from the body. The removal of indigestible wastes through the anus, in the form of feces, is DEFECATION or elimination.

7. 7. It is made up of elastic tissues that function primarily through contraction and working in pairs.

• Bones

• Muscles

• Intestines

• Gallbladder

Answer explanation

The entire muscle shortens during contraction. Muscular tissues help in the movement of bones, squeeze different organs, or compress chambers.

8. 8. __________is a hollow muscular organ that is about the size of a closed fist.

• Heart

• Stomach

• Bones

• Liver

Answer explanation

The heart is a hollow muscular organ about the size of a closed fist. It's in the center of your chest, behind the breastbone. Each heartbeat sends blood that's rich in oxygen and nutrients to all parts of your body.

9. 9. _________ are responsible for taking in oxygen and removing carbon dioxide from the body.

• Lungs

• Nose

• Mouth

• Esophagus

Answer explanation

The lungs and respiratory system allow us to breathe. They bring oxygen into our bodies (called inspiration, or inhalation) and send carbon dioxide out (called expiration, or exhalation). This exchange of oxygen and carbon dioxide is called respiration.

10. 10. ___________is an organ produces hormones that regulate the homeostasis of blood glucose.

• Bones

• Stomach

• Pancreas

• Intestines

Answer explanation

The main function of the pancreas is to maintain healthy blood sugar levels. It is a large gland located behind the stomach. It produces insulin, glucagon, and other hormones.