The human body deeper: lungs, stomach and guts

Tests: 5 of 11 right · Exam: 2 of 4 right · Kind: plain · Understood: 9 of 15 · Run: 2026-10-18, commit f3c23ea72

Lesson 262 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.

Every question of this lesson and each of its options parsed by Mova, with trees and pragmatics: the lesson's questions in the corpora.

Test 1 · wrong ✗

In a cartoon, Tom swallows a bowling ball and you can see it roll down inside his neck, and he is fine at once. What really happens when you swallow food?

1. It sits in the throat until you jump up and down a few times to shake it down — no support
2. It goes into the lungs first — no support
3. It falls straight down like a ball in a pipe — ← Mova's choice · score 1
4. Muscles squeeze it along a long tube in waves, from stomach to guts — ✓ the right answer · score -1

Why: It took the question to ask what happens next. It chose option 3 with score 1, against -1 for the next best. Its support: lesson 214, line 2: «When it is scared, a ring of muscle pulls its skin tight like the string on a drawstring bag, and the hedgehog becomes a prickly ball that most animals give up…», reached through the option's own match among the sentences about the question's things. What matched: the same circumstance (+2). Against it: a different action (counts against) (-1). The right option, 4, scored -1. · the question and its options parsed, with trees and pragmatics

Test 2 · right ✓

«swallowed my gum, mum says it'll be in me 7 years lmao» What is right?

1. Yes, it sticks to the stomach wall for seven whole years before it comes off — score 5
2. No, it goes straight into the blood — no support
3. No, it passes through in a few days, though gum still belongs in a bin — ← Mova's choice · ✓ the right answer · score 10
4. Yes, and then it melts — no support

Why: It took the question to ask which statement is true. It chose option 3 with score 10, against 5 for the next best. Its support: lesson 262, line 13: «Swallowed chewing gum is not digested but passes through in a few days; swallowing lots at once can block the gut, so gum belongs in a bin.», reached through the option's own match among the sentences about the question's things. What matched: the same action «belong» (+4); the same place «bin» (+4); the same doer «gum» (+2). · the question and its options parsed, with trees and pragmatics

Test 3 · wrong ✗

«book says stomach acid can melt metal, so why ain't my belly melting» What is the answer?

1. The book is wrong, because stomach acid is really just as weak as plain water — ← Mova's choice · score 2
2. A thick layer of slime protects the stomach, and the lining renews every few days — ✓ the right answer · no support
3. The stomach is lined with metal — no support
4. Acid only works when you sleep — no support

Why: It took the question to ask why something happens (its cause). It chose option 1 with score 2, the only option with support. Its support: lesson 256, line 4: «Inside each cell's nucleus is DNA, a long instruction book that tells the cell what to do; stretched out, the DNA of one cell would be about two metres long, y…», reached through the cause of the sentence the question matched. What matched: the same doer «long instruction book» (+2). The right option, 2, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 4 · wrong ✗

Count them: a balloon needs 3 normal breaths of half a litre each. How much air is that?

1. Six litres — ← Mova's choice · no support
2. One and a half litres — ✓ the right answer · no support
3. Three litres — no support
4. Half a litre — 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

Test 5 · right ✓

What would happen if the lungs had just one big air bag instead of millions of tiny sacs?

1. You would be able to hold your breath for hours — no support
2. Nothing would change — no support
3. There would be far less surface for oxygen to pass into the blood — ← Mova's choice · ✓ the right answer · score 3
4. Breathing would be much easier, with more room for air in the chest — no support

Why: It took the question to ask what happens next. It chose option 3 with score 3, the only option with support. Its support: lesson 262, line 8: «The lungs have about 500 million tiny air sacs called alveoli, and spread out flat their surface would cover roughly half a tennis court; so many tiny sacs giv…», reached through what followed the sentence the question matched. What matched: the same doer «surface» (+3). · the question and its options parsed, with trees and pragmatics

Test 6 · right ✓

«my uncle smokes and he's fine, so it's no big deal» What is right?

1. Smoking damages the lungs and heart over time and causes cancer — ← Mova's choice · ✓ the right answer · no support
2. It is only harmful for children — no support
3. Smoking cleans dust out of the lungs — no support
4. Smoking only harms people who are already ill with something else — 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

Test 7 · wrong ✗

Why would burping be harder for an astronaut in space?

1. Astronauts have no stomachs in space — ← Mova's choice · score 2
2. Without gravity, gas and food in the stomach do not separate — ✓ the right answer · no support
3. Space has no air for them to burp into — no support
4. Fizzy drinks freeze solid in space as soon as they are opened — no support

Why: It took the question to ask why something happens (its cause). It chose option 1 with score 2, the only option with support. Its support: lesson 67, line 8: «Food is pushed down the food pipe, the oesophagus, by waves of muscle squeezing, so swallowing works even upside down, and astronauts can swallow in space.», reached through the option's own match among the sentences about the question's things. What matched: the same place «space» (+2). The right option, 2, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 8 · wrong ✗

Count them: 2 friends eat lunch at noon. Each meal takes at least 1 day to go all the way through. When is the earliest it could be finished?

1. Around 1 o'clock the same day — ← Mova's choice · no support
2. Around noon the next day — ✓ the right answer · no support
3. Around teatime the same day — no support
4. Exactly one week later, at noon — 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

Test 9 · right ✓

Why is the small intestine so long and bumpy inside?

1. To keep the stomach warm — no support
2. Because it grew far too fast in childhood and got tangled — no support
3. To store food for the winter — no support
4. To give a huge surface for soaking up food — ← 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, the only option with support. Its support: lesson 67, line 14: «The large intestine soaks up water and salts from what is left, and its bacteria break down some of the fibre.», reached through the option's own match among the sentences about the question's things. What matched: the same action «soak up» (+3). · the question and its options parsed, with trees and pragmatics

Test 10 · wrong ✗

The ancient Greeks told of Prometheus, whose liver was eaten each day and grew back. What is true about the real liver?

1. It grows back only in birds, never in people — ← Mova's choice · no support
2. It never grows back at all once it is cut — no support
3. It is replaced by the stomach after a while — no support
4. It can grow back from a part left behind — ✓ the right answer · 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

Test 11 · right ✓

A doctor today wanted to copy Beaumont's food-on-a-string tests on a patient. Why would it not be allowed?

1. Stomachs work differently today from how they did in the past, so his results are useless — no support
2. There are no more stomachs left to study — no support
3. Food on strings is now forbidden in shops — no support
4. Patients must be safe and freely agree, with careful rules for experiments — ← 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, the only option with support. Its support: lesson 262, line 17: «In 1822 Alexis St. Martin was shot, and his wound healed leaving a hole into his stomach; the doctor William Beaumont put food on strings through it to watch d…», reached through the same lesson line as the sentence the question matched. What matched: the same action «agree» (+2); the same property (+1). · the question and its options parsed, with trees and pragmatics

Exam question 1 · formal language · right ✓

Identify the principal function of the alveoli of the lungs.

1. The exchange of oxygen and carbon dioxide between the air and the blood — ← Mova's choice · ✓ the right answer · no support
2. The digestion of food prior to its absorption into the blood through the walls of the lungs — no support
3. The storage of water for the body — no support
4. The production of sound in speech — no support

Why: Nothing it remembers matched the question, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Exam question 2 · formal language · right ✓

Select the response consistent with the established facts concerning the fate of chewing gum upon its being swallowed.

1. It is wholly absorbed into the blood — no support
2. It adheres permanently to the wall of the intestine — no support
3. It passes through the digestive tract within a few days, being itself undigested — ← Mova's choice · ✓ the right answer · score 6
4. It remains within the stomach for a period of seven years — score 3

Why: It took the question to ask which statement is true. It chose option 3 with score 6, against 3 for the next best. Its support: lesson 262, line 13: «Swallowed chewing gum is not digested but passes through in a few days; swallowing lots at once can block the gut, so gum belongs in a bin.», reached through a sentence linked to the one the question matched. What matched: the same action «pass» (+4); the same property (+2). · the question and its options parsed, with trees and pragmatics

Exam question 3 · formal language · wrong ✗

Which of the following statements most accurately characterises the protection of the stomach against its own acid?

1. The acid is too weak to affect any tissue — ← Mova's choice · score 5
2. The stomach is lined with bone — no support
3. The acid is discharged from the body every hour, before it can cause harm to the stomach — score 3
4. A thick layer of mucus covers its wall, and its lining is renewed every few days — ✓ the right answer · score -1

Why: It took the question to ask who or what does it. It chose option 1 with score 5, against 3 for the next best. Its support: lesson 262, line 14: «Stomach acid is very strong and kills germs and breaks down food, and a thick layer of slime stops the stomach from digesting itself; the lining replaces itsel…», reached through a sentence linked to the one the question matched. What matched: it fills the role the question asks for (+3); the same doer «stomach acid» (+2). The right option, 4, scored -1. · the question and its options parsed, with trees and pragmatics

Exam question 4 · formal language · wrong ✗

Ascertain which organ is the largest within the human body and is capable of regeneration from a remaining portion.

1. The heart — ← Mova's choice · no support
2. The brain — no support
3. The lungs — no support
4. The liver — ✓ the right answer · 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

This page in Markdown → https://md.mova.elamur.ai/free/en/school-run/biology/262-human-body-deeper-lungs-stomach-and-guts/