First Quarter Examination in SCIENCE 8

What is the primary function of the teeth in the digestive process?

• to absorb nutrients

• to break down food mechanically

• to transport food

• to produce saliva

What happens to food in the stomach?

• only mechanical digestion occurs

• enzymes are added and food is churned

• food is absorbed into the blood

• water is removed

Which shows the correct order of food passage through the digestive system?

• Mouth → Stomach → Esophagus → Small Intestine → Large Intestine

• Mouth → Esophagus → Stomach → Small Intestine → Large Intestine

• Esophagus → Mouth → Large Intestine → Stomach → Rectum

• Stomach → Mouth → Small Intestine → Large Intestine → Rectum

What is the primary function of the large intestine?

• absorb nutrients

• produce bile

• absorb water and form feces

• digest fats

In which two labeled parts do digestion and absorption mainly occur?

• stomach and small Intestine

• mouth and esophagus

• large intestine and rectum

• esophagus and liver

Which matching is correct based on the table above?

• 1-b, 2-c, 3-a

• 1-a, 2-b, 3-c

• 1-c, 2-a, 3-b

• 1-a, 2-c, 3-b

After eating a meal, food goes through various processes in the body before waste is eliminated. Which of the following body systems is responsible for removing liquid waste products filtered from the blood?

• Digestive system

• Respiratory system

• Circulatory system

• Excretory system

According to the diagram, what role do the kidneys play in the excretory system?

• absorb nutrients from food

• digest fats and sugars

• filter waste from the blood

• produce digestive enzymes

Based on the flowchart, how do the digestive and excretory systems interact?

• The digestive system stores urine for removal

• Waste from digestion enters the bloodstream and is filtered by the kidneys

• The kidneys absorb nutrients from the small intestine

• Feces are formed in the kidneys and passed through the bladder

A student drinks a large glass of water and eats a protein-rich lunch. A few hours later, the student urinates more frequently. Using your understanding of body systems, which of the following best explains what is happening?

• The digestive system absorbs water and sends it directly to the bladder

• Protein is broken down in the kidneys, which increases blood pressure

• The digestive system breaks down nutrients, while the excretory system filters excess water and waste from the blood

• The bladder digests protein and regulates water levels in the body