Digestive System Review

How many strong teeth are involved in breaking down food in the mouth?

• 20

• 24

• 28

• 32

Answer explanation

28 strong teeth are involved in breaking down food in the mouth, making it the correct choice out of the options provided.

What is the role of the tongue in the digestive process in the mouth?

• It blocks the windpipe

• It produces saliva

• It moves the food around and helps in swallowing

• It senses the taste of food only

Answer explanation

The tongue moves the food around and helps in swallowing, aiding in the initial breakdown of food particles in the mouth.

Imagine you're enjoying a delicious meal. What does the epiglottis do when you swallow a bite?

• It helps in chewing the food

• It closes off the windpipe

• It produces digestive enzymes

• It absorbs nutrients

Answer explanation

The epiglottis closes off the windpipe when you swallow to prevent food from entering the airway.

Imagine you're at a dinner party and you start a conversation. What is the purpose of the slimy liquid in your mouth during this scenario?

• To make speaking easier

• To help with food digestion

• To cool down the mouth

• To numb the mouth

Answer explanation

The purpose of the slimy liquid in your mouth is to help with food digestion.

Tags

NGSS.MS-LS1-7

Imagine you are studying human anatomy and come across the digestive system. You wonder, how long is the oesophagus, also known as the gullet?

• 15cm

• 25cm

• 30cm

• 40cm

Answer explanation

The correct length of the oesophagus, also known as the gullet, is 25cm, as stated in the answer choices.

What is the term used to describe the squeezing motion of muscles that moves food down to the stomach?

• Churning

• Peristalsis

• Osmosis

• Mastication

Answer explanation

Peristalsis is the term used to describe the squeezing motion of muscles that moves food down to the stomach.

What does the stomach lining release to help break down food?

• Bile

• Chyme

• Digestive juices and acid

• Mucus

Answer explanation

The stomach lining releases digestive juices and acid to help break down food during the digestion process.

Tags

NGSS.MS-LS1-7

What is the partially digested, sloppy soup that food becomes in the stomach called?

• Bolus

• Chyme

• Pulp

• Gastric soup

Answer explanation

Chyme is the partially digested, sloppy soup that food becomes in the stomach, making it the correct choice.

Tags

NGSS.MS-LS1-7

Imagine you're an astronaut doing a spacewalk and you decide to have a snack. According to the fast fact, what would happen to the food due to peristalsis even if you were upside down in zero gravity?

• It would stay in the oesophagus

• It would go back into the mouth

• It would get to your stomach

• It would be digested slower

Answer explanation

Peristalsis would still push the food down to your stomach even if you were standing on your head, allowing it to reach the stomach for digestion.

Imagine you are a medical student studying for an anatomy exam. You need to remember the length of the small intestine for a question that might appear on the test. How long is the small intestine?

• 3.5 metres

• 6.5 metres

• 1.5 metres

• 5 metres

Answer explanation

The correct answer is 6.5 metres as the small intestine typically measures around this length in adults.