--- title: Digestion: the journey of a sandwich — how Mova does on the tests · Biology description: Lesson 67 of the biology course of Mova's primary school: 5 of 11 tests right, exam 3 of 4, every question with the options, the student's choice, the right answer and why it chose. --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/school-run/biology/67-digestion-the-journey-of-a-sandwich/) [home](https://md.mova.elamur.ai/free/en/) / [at school](https://md.mova.elamur.ai/free/en/school-run/) / [Biology](https://md.mova.elamur.ai/free/en/school-run/biology/) / 67 # Digestion: the journey of a sandwich **Tests:** 5 of 11 right · **Exam:** 3 of 4 right · **Kind:** ★★ · **Understood:** 12 of 15 · **Run:** 2026-10-18, commit `f3c23ea72` Lesson 67 of the biology course of Mova's primary school, as Mova's small model took its tests: it had read this lesson and the ones before it and learned from their exercises. Each test shows the options in the order the student saw them, its choice, the right answer, the score of every option and why it chose. The lesson itself, sentence by sentence with trees and pragmatics: [the lesson in the corpora](https://md.mova.elamur.ai/free/en/corpora/school/biology/67-digestion-the-journey-of-a-sandwich/). Every question of this lesson and each of its options parsed by Mova, with trees and pragmatics: [the lesson's questions in the corpora](https://md.mova.elamur.ai/free/en/corpora/questions/biology/67-digestion-the-journey-of-a-sandwich/). ### Test 1 · ★★ · right ✓ {#t1} mum says if i swallow gum it stays in me for 7 years. true or nah? - **1.** True, it sticks to the stomach wall for 7 whole years — score 3 - **2.** True, but only if it is bubblegum — no support - **3.** Nah, it melts in your mouth before you swallow — no support - **4.** Nah, it passes through and leaves in a few days — **← Mova's choice** · **✓ the right answer** · score 11 **Why:** It took the question to ask which statement is true. It chose option 4 with score 11, against 3 for the next best. Its support: lesson 67, line 19: «Swallowed chewing gum is not digested, but it does not stay inside for 7 years: it passes through and leaves the body in a few days, like other things we canno…», reached through the same lesson line as the sentence the question matched. What matched: the same doer «gum» (+5); the same action «leave» (+4); the same property (+2). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/67-digestion-the-journey-of-a-sandwich/t1/) ### Test 2 · ★★ · wrong ✗ {#t2} In a cartoon a sandwich slides down a slide straight into an empty stomach and stays whole. Put it right. - **1.** Sandwiches really do reach the stomach whole and stay whole there until bedtime — **← Mova's choice** · score 4 - **2.** It is chewed, mixed with saliva, pushed down by muscles and broken down by acid — **✓ the right answer** · no support - **3.** Food goes to the lungs first and only then on to the stomach — no support - **4.** The stomach has teeth of its own that chew the sandwich up — no support **Why:** It took the question to ask which statement is true. It chose option 1 with score 4, the only option with support. Its support: lesson 67, line 3: «When you swallow, muscles in the food pipe squeeze it down in waves, like toothpaste pushed along a tube, so it would reach your stomach even if you stood on y…», reached through the remembered sentence the question matched. What matched: the same thing acted on «stomach» (+5); the same action «reach» (+2). Against it: a different doer (counts against) (-3). The right option, 2, found no support in what it remembers. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/67-digestion-the-journey-of-a-sandwich/t2/) ### Test 3 · ★★ · wrong ✗ {#t3} What would happen if you did not chew a sandwich at all? - **1.** It would be harder to swallow and slower to digest — **✓ the right answer** · no support - **2.** It would go straight into the blood — **← Mova's choice** · score 4 - **3.** It would digest faster because it is still in one piece — score 4 - **4.** It would never reach the stomach — score 0 **Why:** It took the question to ask what happens next. It chose option 2 with score 4, tied with another option at 4 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 46, line 3: «Look at your cheese sandwich: the bread was wheat that grew in sunshine, the cheese came from milk from a cow that ate grass, so you are at the end of food cha…», reached through what followed the sentence the question matched. What matched: the same doer «wheat» (+4). The right option, 1, found no support in what it remembers. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/67-digestion-the-journey-of-a-sandwich/t3/) ### Test 4 · ★★ · right ✓ {#t4} Raj chews a piece of bread for a whole minute and it starts to taste sweet. Why? - **1.** Saliva is turning the starch in the bread into sugar — **← Mova's choice** · **✓ the right answer** · score 3 - **2.** His tongue is getting tired of the taste — no support - **3.** His teeth are slowly adding sugar to the bread as he chews — score -2 - **4.** The bread was sweet all along but hidden — no support **Why:** It took the question to ask why something happens (its cause). It chose option 1 with score 3, against -2 for the next best. Its support: lesson 67, line 2: «It starts in the mouth: teeth cut and grind, and saliva wets the food and already begins turning the starch of the bread into sugar, which is why bread chewed…», reached through the same lesson line as the sentence the question matched. What matched: the same action «turn» (+2); the same circumstance (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/67-digestion-the-journey-of-a-sandwich/t4/) ### Test 5 · ★★ · right ✓ {#t5} Ella laughs while drinking juice and coughs and splutters. What happened? - **1.** Her teeth bit the juice by mistake — no support - **2.** The juice went down into her stomach far too fast and bounced back up — no support - **3.** The epiglottis did not cover her windpipe in time and juice slipped in — **← Mova's choice** · **✓ the right answer** · score 4 - **4.** The juice was far too sweet for her throat — no support **Why:** It took the question to ask which statement is true. It chose option 3 with score 4, the only option with support. Its support: lesson 67, line 9: «When you swallow, a flap called the epiglottis covers the windpipe; if you laugh or talk while swallowing, some drink can slip into the windpipe and you cough…», reached through the same lesson line as the sentence the question matched. What matched: the same action «cover» (+4); the same thing acted on «windpipe» (+2). Against it: one says «not», the other does not (counts against) (-2). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/67-digestion-the-journey-of-a-sandwich/t5/) ### Test 6 · ★★ · wrong ✗ {#t6} ugh, imagine the stomach acid melting your whole tummy. why doesn't it? - **1.** The acid only switches on at night — no support - **2.** The acid is just water so it cannot melt anything — **← Mova's choice** · score -1 - **3.** The stomach is made of steel lol — no support - **4.** A layer of mucus protects the stomach lining — **✓ the right answer** · no support **Why:** It took the question to ask why something happens (its cause). It chose option 2 with score -1, the only option with support. Its support: lesson 63, line 16: «Plaque is a sticky film of bacteria on teeth; they feed on sugar and make acid that slowly dissolves the enamel and makes holes; a dentist's pink disclosing ta…», reached through the option's own match among the sentences about the question's things. What matched: the same action «dissolve» (+2); the same doer «acid» (+1). Against it: a different thing acted on (counts against) (-1); one says «not», the other does not (counts against) (-3). The right option, 4, found no support in what it remembers. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/67-digestion-the-journey-of-a-sandwich/t6/) ### Test 7 · ★★ · wrong ✗ {#t7} Why is the small intestine so long and folded? - **1.** Long tubes make the food taste better — no support - **2.** A long, folded tube with villi gives a huge surface to soak up food — **✓ the right answer** · score 2 - **3.** It needs to be long enough to reach right down to the feet and back — **← Mova's choice** · score 6 - **4.** It stores spare food in its folds for the winter — no support **Why:** It took the question to ask why something happens (its cause). It chose option 3 with score 6, against 2 for the next best. Its support: lesson 67, line 12: «The small intestine is about 6 to 7 metres long in an adult, folded up in the tummy, and most digestion and absorption of food into the blood happens there.», reached through the same lesson line as the sentence the question matched. What matched: the same doer «small intestine» (+4); the same light verb (be, have, do, get, go) (+2). The right option, 2, scored 2. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/67-digestion-the-journey-of-a-sandwich/t7/) ### Test 8 · ★★ · wrong ✗ {#t8} Sam eats only white bread and sweets for a week and his tummy feels stuck. What is missing? - **1.** More fizzy drinks to wash things through — **← Mova's choice** · no support - **2.** Nothing, sweets already have plenty of fibre in them — no support - **3.** Fibre from fruit, vegetables and whole grains — **✓ the right answer** · no support - **4.** More salt on his chips — no support **Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/67-digestion-the-journey-of-a-sandwich/t8/) ### Test 9 · ★★ · wrong ✗ {#t9} At lunch a friend says what you eat today is all gone by tea time. Right? - **1.** Yes, by tea time it has all turned into breath and gone — no support - **2.** No, food stays inside you for a whole month or more — **← Mova's choice** · score 1 - **3.** Yes, food is used up completely in about two hours — no support - **4.** No, a meal usually takes about one to three days to go through — **✓ the right answer** · no support **Why:** It took the question to ask which statement is true. It chose option 2 with score 1, the only option with support. Its support: lesson 61, line 4: «Other plants are strange in different ways: a flower a metre wide with no leaves at all, a flower spike taller than a grown-up that stinks of rotting meat, a d…», reached through the option's own match among the sentences about the question's things. What matched: the same circumstance (+2); the same doer «nettle» (+1). Against it: a different action (counts against) (-2). The right option, 4, found no support in what it remembers. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/67-digestion-the-journey-of-a-sandwich/t9/) ### Test 10 · ★★ · right ✓ {#t10} Why do astronauts not need gravity to swallow their food? - **1.** Space food floats into the stomach by itself — no support - **2.** They always eat upside down so it all evens out — score -2 - **3.** They drink all their food through tubes into the stomach — score 2 - **4.** Muscles in the food pipe push the food along by squeezing — **← Mova's choice** · **✓ the right answer** · score 3 **Why:** It took the question to ask why something happens (its cause). It chose option 4 with score 3, against 2 for the next best. Its support: lesson 32, line 11: «A frog swallows prey whole and pulls its eyeballs down into its head to help push the food down its throat.», reached through the option's own match among the sentences about the question's things. What matched: the same action «push» (+2); the same thing acted on «food» (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/67-digestion-the-journey-of-a-sandwich/t10/) ### Test 11 · ★★ · right ✓ {#t11} In a game, eating a mushroom gives instant energy the second it touches your lips. How long does real food take? - **1.** Some time, because it must be digested and soaked into the blood first — **← Mova's choice** · **✓ the right answer** · score 5 - **2.** It really does work the instant it touches the mouth, just like in the game — no support - **3.** Energy goes in through the teeth — no support - **4.** Energy only arrives after a whole year — no support **Why:** It took the question to ask what something is like. It chose option 1 with score 5, the only option with support. Its support: lesson 67, line 10: «The stomach churns food with strong hydrochloric acid and enzymes that break down proteins, and the acid kills many germs; a layer of mucus stops it digesting…», reached through the option's own match among the sentences about the question's things. What matched: the same action «digest» (+5); the same thing acted on «food» (+1). Against it: a different doer (counts against) (-1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/67-digestion-the-journey-of-a-sandwich/t11/) ### Exam question 1 · formal language · right ✓ {#e1} Identify the principal site of the absorption of digested food into the blood. - **1.** The large intestine — no support - **2.** The oesophagus — no support - **3.** The mouth — no support - **4.** The small intestine — **← Mova's choice** · **✓ the right answer** · score 7 **Why:** It took the question to ask which statement is true. It chose option 4 with score 7, the only option with support. Its support: lesson 67, line 12: «The small intestine is about 6 to 7 metres long in an adult, folded up in the tummy, and most digestion and absorption of food into the blood happens there.», reached through the same lesson line as the sentence the question matched. What matched: the same doer «small intestine» (+5); the same property (+2). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/67-digestion-the-journey-of-a-sandwich/e1/) ### Exam question 2 · formal language · wrong ✗ {#e2} Which of the following statements most accurately characterises the passage of food along the oesophagus? - **1.** It descends solely under the influence of gravity — **← Mova's choice** · no support - **2.** It is conveyed downward by repeated movements of the epiglottis — no support - **3.** It is propelled by waves of muscular contraction — **✓ the right answer** · no support - **4.** It is drawn downward by suction from the stomach — no support **Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/67-digestion-the-journey-of-a-sandwich/e2/) ### Exam question 3 · formal language · right ✓ {#e3} It is asserted that chewing gum, once swallowed, persists within the stomach for seven years. Select the response consistent with the established facts. - **1.** The assertion is false; gum is excreted within a few days — **← Mova's choice** · **✓ the right answer** · no support - **2.** The assertion is true of all varieties of gum — no support - **3.** The assertion is true where the gum has not been chewed thoroughly — no support - **4.** The assertion is true of gum swallowed in childhood — no support **Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/67-digestion-the-journey-of-a-sandwich/e3/) ### Exam question 4 · formal language · right ✓ {#e4} Ascertain the function of the epiglottis during the act of swallowing. - **1.** It covers the windpipe, preventing the entry of food — **← Mova's choice** · **✓ the right answer** · score 6 - **2.** It grinds food prior to swallowing — score 6 - **3.** It secretes acid into the stomach during swallowing — no support - **4.** It absorbs water from the food as it passes downward — no support **Why:** It took the question to ask which statement is true. It chose option 1 with score 6, tied with another option at 6 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 67, line 9: «When you swallow, a flap called the epiglottis covers the windpipe; if you laugh or talk while swallowing, some drink can slip into the windpipe and you cough…», reached through the same lesson line as the sentence the question matched. What matched: the same action «cover» (+4); the same thing acted on «windpipe» (+2). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/67-digestion-the-journey-of-a-sandwich/e4/) - ← previous: [66. Lungs and breathing](https://md.mova.elamur.ai/free/en/school-run/biology/66-lungs-and-breathing/) - next →: [68. The brain and nerves](https://md.mova.elamur.ai/free/en/school-run/biology/68-the-brain-and-nerves/) - ↑ back to [Biology](https://md.mova.elamur.ai/free/en/school-run/biology/)