Q 01/05

At which blind pouch in the lower right abdomen does the large bowel begin?

A) Cecum

B) Sigmoid colon

C) Ampulla

D) Haustrum

Answer · why

A) Cecum

The cecum is the blind pouch where the large bowel begins; the appendix hangs from it in the right iliac region, which is why appendicitis pain settle...

Q 02/05

What enzyme in saliva begins the chemical digestion of carbohydrates?

A) Amylase

B) Lipase

C) Pepsin

D) Trypsin

Answer · why

A) Amylase

Amylase starts on starch in the mouth, but food leaves too soon for it to finish, so the pancreas sends more amylase into the small intestine.

Q 03/05

Which small fleshy flap at the back of the mouth rises when you swallow to help keep food out of the nose?

A) Frenulum

B) Uvula

C) Adenoid

D) Gingiva

Answer · why

B) Uvula

The uvula rises with the soft palate when you swallow, and it can also vibrate and add to the sound of snoring.

Q 04/05

Which tissue covering the crown of a tooth is the hardest substance in the human body?

A) Dentin

B) Enamel

C) Cementum

D) Pulp

Answer · why

B) Enamel

Enamel is still vulnerable: bacteria in plaque turn sugar and starch into acids that eat away at it, causing tooth decay.

Q 05/05

Where does most chemical digestion and nutrient absorption primarily occur?

A) Stomach

B) Small intestine

C) Esophagus

D) Large intestine

Answer · why

B) Small intestine

The small intestine is the primary site where the majority of chemical digestion takes place and where most nutrients are absorbed into the bloodstrea...