The human body deeper: bones, muscles and skin

Tests: 6 of 11 right · Exam: 1 of 4 right · Kind: plain · Understood: 9 of 15 · Run: 2026-10-18, commit f3c23ea72

Lesson 263 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 · right ✓

In a cartoon, Tom is flattened like a pancake by a steamroller and pops back into shape a second later. What is true for a real body?

1. Bodies spring back into shape like rubber, after any squash at all — no support
2. Bones can never break, only bend — score 0
3. Bones can break, and healing takes a doctor, a cast and weeks — ← Mova's choice · ✓ the right answer · score 4
4. Only the skin gets flat, the bones bend back — no support

Why: It took the question to ask which statement is true. It chose option 3 with score 4, against 0 for the next best. Its support: lesson 263, line 5: «In cartoons like Tom and Jerry, Tom gets flattened like a pancake or shatters into pieces and pops back into shape a second later; real bones can break, and a…», reached through the same lesson line as the sentence the question matched. What matched: the same thing acted on «doctor» (+3); the same action «need» (+2). Against it: a different doer (counts against) (-1). · the question and its options parsed, with trees and pragmatics

Test 2 · right ✓

«whacked my funny bone, why's my whole arm buzzing if it's just a bone» What is right?

1. It is a nerve, not a bone, and squeezing it sends a zing down the arm — ← Mova's choice · ✓ the right answer · score 6
2. The bone is hollow inside and rings like a bell when you hit it hard — score 1
3. The arm bone cracked a little — score 3
4. The blood stopped for a second — no support

Why: It took the question to ask why something happens (its cause). It chose option 1 with score 6, against 3 for the next best. Its support: lesson 158, line 4: «Cartoons show snakes crushing bones like a garden hose tied in knots; a real anaconda squeezes until the prey's blood stops flowing, and it is a shy animal tha…», reached through the option's own match among the sentences about the question's things. What matched: the same action «crush» (+3); the same thing acted on «bones» (+3). · the question and its options parsed, with trees and pragmatics

Test 3 · wrong ✗

Count them: Mia's cat has 4 legs and Mia has 2 arms and 2 legs. In the morning Mia measures herself. How many legs are in the room?

1. 4 — ← Mova's choice · no support
2. 8 — no support
3. 6 — ✓ the right answer · no support
4. 2 — 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 4 · wrong ✗

«my mate reckons twins have the same fingerprints so police can't tell 'em apart» What is right?

1. Yes, but only on their thumbs — ← Mova's choice · no support
2. Yes, identical twins share fingerprints — no support
3. No, twins have no fingerprints at all — no support
4. No, even identical twins have different fingerprints — ✓ 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 5 · right ✓

What would happen if the biceps had no partner muscle?

1. The arm would grow much stronger — no support
2. The arm would bend both ways — score 5
3. You could bend your arm but not straighten it again by muscle — ← Mova's choice · ✓ the right answer · score 9
4. You could not bend your arm at all, not even a tiny bit, ever — score 3

Why: It took the question to ask what happens next. It chose option 3 with score 9, against 5 for the next best. Its support: lesson 263, line 3: «Muscles can only pull, never push, so they work in pairs: when you flex your arm, the biceps shortens and bulges to bend it, and the triceps on the back pulls…», reached through what followed the sentence the question matched. What matched: the same action «bend» (+6); the same thing acted on «arm» (+4). Against it: a different doer (counts against) (-1). · the question and its options parsed, with trees and pragmatics

Test 6 · wrong ✗

A frightened cat puffs up its fur. Which part of you does the same job?

1. The nails on your toes — ← Mova's choice · no support
2. The fingerprints on your hands — no support
3. The wrinkles on your fingers — no support
4. The goosebumps on your arms — ✓ 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 7 · right ✓

«got burnt at the beach, now skin's peeling off, gross» What is happening?

1. The skin is turning into a tan — score 3
2. The skin is growing a new colour underneath the old one — score 3
3. Sand is coming out of the skin — no support
4. The body is shedding skin cells the sun damaged — ← Mova's choice · ✓ the right answer · score 6

Why: It took the question to ask what happens next. It chose option 4 with score 6, against 3 for the next best. Its support: lesson 263, line 15: «Skin is the biggest organ, about 2 square metres on an adult; sunburn damages skin cells, which the body then sheds, and sun cream and a hat protect skin from…», reached through the same lesson line as the sentence the question matched. What matched: the same doer «body» (+3); the same action «shed» (+2); the same thing acted on «skin cells» (+1). · the question and its options parsed, with trees and pragmatics

Test 8 · right ✓

«strongest muscle's the tongue, everybody knows that» What is a better answer?

1. No, the strongest muscle is the eyelid — no support
2. Yes, the tongue lifts the most weight — no support
3. Yes, the tongue never gets tired — no support
4. It depends what «strongest» means: the jaw bites hardest, the heart works hardest, the bottom is biggest — ← Mova's choice · ✓ the right answer · score 4

Why: It took the question to ask which statement is true. It chose option 4 with score 4, the only option with support. Its support: lesson 263, line 14: «The jaw muscle, the masseter, bites very hard for its size, the heart is the hardest-working muscle, and the biggest muscle is the gluteus maximus in your bott…», reached through the option's own match among the sentences about the question's things. What matched: the same action «bite» (+4); the same property (+2). Against it: a different doer (counts against) (-2). · the question and its options parsed, with trees and pragmatics

Test 9 · wrong ✗

Count them: in the hospital 3 children each have an X-ray showing 2 broken bones. How many broken bones are there in all?

1. 9 — ← Mova's choice · no support
2. 3 — no support
3. 5 — no support
4. 6 — ✓ 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 10 · right ✓

Why would living with no gravity weaken an astronaut's bones?

1. Bones float away from the muscles — no support
2. Bones get weaker when they do not carry weight, unless astronauts exercise — ← Mova's choice · ✓ the right answer · score 5
3. Space air dissolves bones — no support
4. Astronauts drink no milk at all, so their bones go soft and bendy in a few days — score 1

Why: It took the question to ask why something happens (its cause). It chose option 2 with score 5, against 1 for the next best. Its support: lesson 263, line 19: «Bones need calcium, for example from milk, vitamin D from sunlight, and exercise such as running and jumping to stay strong; bones weaken when they carry no we…», reached through the option's own match among the sentences about the question's things. What matched: the same action «carry» (+3); the same thing acted on «weight» (+3). Against it: one says «not», the other does not (counts against) (-1). · the question and its options parsed, with trees and pragmatics

Test 11 · wrong ✗

Why might wrinkly wet fingers have helped our ancestors?

1. They may grip better on wet rocks and in streams — ✓ the right answer · no support
2. They keep the fingers warmer — score 4
3. They make hands look older and wiser — ← Mova's choice · score 10
4. They stop water getting in — no support

Why: It took the question to ask why something happens (its cause). It chose option 3 with score 10, against 4 for the next best. Its support: lesson 263, line 18: «Fingers and toes wrinkle in the bath because nerves make them do it, perhaps for better grip in the wet, like tyre treads; a finger whose nerve is cut does not…», reached through the cause of the sentence the question matched. What matched: the same action «make» (+6); the same thing acted on «fingers» (+5). Against it: a different doer (counts against) (-1). The right option, 1, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Exam question 1 · formal language · wrong ✗

Identify the principal reason for which the muscles of the arm are arranged in opposing pairs.

1. One muscle of each pair is invariably at rest while the other labours — ← Mova's choice · no support
2. Muscles are capable only of pulling, and not of pushing — ✓ the right answer · no support
3. A single muscle is insufficient to support a bone — no support
4. The pairs are required to share a single blood supply — 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

Exam question 2 · formal language · wrong ✗

Select the response consistent with the established facts concerning the number of bones in the human body.

1. An infant possesses no bones until the age of one year — no support
2. An adult possesses approximately three hundred bones — ← Mova's choice · score 1
3. An infant possesses approximately three hundred bones, many of which fuse, so that an adult possesses two hundred and six — ✓ the right answer · no support
4. An infant and an adult possess an identical number of bones, the bones merely increasing in size as the body grows — score 1

Why: It took the question to ask which statement is true. It chose option 2 with score 1, tied with another option at 1 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 263, line 6: «An adult has 206 bones, but a baby has about 300, and many of them join together as the child grows.», reached through the remembered sentence the question matched. What matched: the same thing acted on «206 bones» (+4). Against it: the same doer «adult» (-3). The right option, 3, found no support in what it remembers. · 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 so-called «funny bone»?

1. It is a nerve situated close to the skin near the elbow — ✓ the right answer · score 4
2. It is the smallest bone within the ear — ← Mova's choice · score 8
3. It is a muscle of the upper arm — no support
4. It is the bone of the upper arm termed the humerus — score 7

Why: It took the question to ask who or what does it. It chose option 2 with score 8, against 7 for the next best. Its support: lesson 64, line 10: «The smallest bone in the body is the stirrup bone in the middle ear, about 3 millimetres long, and the longest is the thigh bone, the femur.», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «stirrup bone» (+2); the same light verb (be, have, do, get, go) (+2); it fills the role the question asks for (+2); the same doer «smallest bone» (+1). The right option, 1, scored 4. · the question and its options parsed, with trees and pragmatics

Exam question 4 · formal language · right ✓

Ascertain the cause of the slight difference in a person's height between morning and evening.

1. The compression during the day of the discs between the bones of the spine — ← Mova's choice · ✓ the right answer · no support
2. The drying of the skin over the course of the day — no support
3. The shrinking of the skull in the evening — no support
4. The growth of the legs during sleep, which is then reversed during the hours of the day — 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/263-human-body-deeper-bones-muscles-and-skin/