The human body deeper: the brain and nerves

Tests: 5 of 11 right · Exam: 0 of 4 right · Kind: plain · Understood: 12 of 15 · Run: 2026-10-18, commit f3c23ea72

Lesson 260 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 hit on the head with a frying pan, sees birds spinning round his head and jumps up a second later. What is true?

1. Only cats get hurt by knocks on the head — no support
2. Heads bounce back from any blow at once, so you can play on straight away — no support
3. Seeing birds is how the brain heals itself — score 5
4. A hard knock can shake the brain, and you should rest and see a doctor — ← 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, against 5 for the next best. Its support: lesson 260, line 5: «In cartoons like Tom and Jerry, Tom gets bonked on the head, sees stars and birds spinning round, and is fine a second later; a real hard knock can shake the b…», reached through the same lesson line as the sentence the question matched. What matched: the same action «shake» (+3); the same thing acted on «brain» (+3); the same doer «real hard knock» (+1). · the question and its options parsed, with trees and pragmatics

Test 2 · wrong ✗

«in that film the girl uses 100% of her brain and gets superpowers, so we only use 10% right» What is right?

1. Yes, but geniuses use 20 percent — score 3
2. No, we use only 1 percent — ← Mova's choice · score 5
3. No, we use all of our brain; the 10 percent idea is a myth — ✓ the right answer · score 5
4. Yes, the other 90 percent is asleep, waiting to be woken up — no support

Why: It took the question to ask which statement is true. It chose option 2 with score 5, tied with another option at 5 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 68, line 12: «The idea that people are «left-brained» or «right-brained», and that we use only 10 percent of our brain, are myths: we use all of it, though not all parts at…», reached through the option's own match among the sentences about the question's things. What matched: the same action «use» (+4); the same thing acted on «10 percent» (+1). The right option, 3, scored 5. · the question and its options parsed, with trees and pragmatics

Test 3 · wrong ✗

Count them: a model in the museum shows 1 brain with 2 halves and 1 spinal cord. How many halves would 3 models show?

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

«gonna cram all night before the test, sleep's for losers» What would help more?

1. Staying awake all night, because sleep wipes out new memories — score 7
2. Spreading practice over days and sleeping, since sleep fixes memories — ← Mova's choice · ✓ the right answer · score 12
3. Eating sweets during the test — no support
4. Reading the book only once — no support

Why: It took the question to ask who or what does it. It chose option 2 with score 12, against 7 for the next best. Its support: lesson 260, line 10: «Memories get stronger when you repeat them, sleep helps fix them as the brain replays the day, and spacing practice over several days works better than crammin…», reached through the same lesson line as the sentence the question matched. What matched: the same action «fix» (+6); the same thing acted on «memories» (+4); a different doer (counts against) (+2). · the question and its options parsed, with trees and pragmatics

Test 5 · right ✓

«my brother says I'm right-brained so I'm rubbish at maths» What is right?

1. True, right-brained people can never do maths, however hard they try — no support
2. False, everyone is left-brained — no support
3. True, but it changes on Tuesdays — no support
4. That is a myth; both halves of the brain work together — ← 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 260, line 12: «The idea that some people are «left-brained» and others «right-brained» is a myth; both halves work together.», reached through the same lesson line as the sentence the question matched. What matched: the same action «work together» (+3); the same doer «halves» (+1). · the question and its options parsed, with trees and pragmatics

Test 6 · wrong ✗

What would happen if a message from a hot pan had to go all the way to the brain first?

1. You would pull your hand away a little later and might get a worse burn — ✓ the right answer · score 3
2. The pan would cool down faster — no support
3. You would pull away much sooner, because the brain is far quicker than the spinal cord — ← Mova's choice · score 4
4. You would never feel anything — no support

Why: It took the question to ask what happens next. It chose option 3 with score 4, against 3 for the next best. Its support: lesson 260, line 6: «A reflex is a quick action where the message goes to the spinal cord, which sends the order straight back without waiting for the brain, saving a fraction of a…», reached through what followed the sentence the question matched. What matched: the same circumstance (+5). Against it: a different doer (counts against) (-1). The right option, 1, scored 3. · the question and its options parsed, with trees and pragmatics

Test 7 · right ✓

A robot tickles you a short moment after you press its button. Why might it work a bit?

1. Electricity tickles on its own — no support
2. The delay makes the touch less predictable for your brain — ← Mova's choice · ✓ the right answer · score 4
3. Robots have special tickly fingers made of feathers — no support
4. Buttons make the skin softer — no support

Why: It took the question to ask why something happens (its cause). It chose option 2 with score 4, the only option with support. Its support: lesson 258, line 18: «About 8 percent of human DNA is made of bits of old viruses that got into our ancestors long ago.», reached through the option's own match among the sentences about the question's things. What matched: the same action «make» (+3); the same circumstance (+1). · the question and its options parsed, with trees and pragmatics

Test 8 · right ✓

«my leg's gone dead, pins and needles, will it fall off» What is right?

1. Yes, unless you keep sitting on it — no support
2. No, a squashed nerve is just waking up; moving the leg helps — ← Mova's choice · ✓ the right answer · score 6
3. No, but it will stay numb all week — no support
4. Yes, if it lasts more than a minute you must call an ambulance at once — score 6

Why: It took the question to ask which statement is true. It chose option 2 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 260, line 13: «Sitting on a nerve squashes it and stops its messages for a while, and the tingle of pins and needles is the nerve waking up; moving the leg about helps it wak…», reached through the same lesson line as the sentence the question matched. What matched: the same action «move» (+3); the same thing acted on «leg» (+3). · the question and its options parsed, with trees and pragmatics

Test 9 · wrong ✗

Why might your eyes feel dry and tired after a long game on a screen?

1. Games make your eyes smaller — ← Mova's choice · score 6
2. You blink less while staring at the screen — ✓ the right answer · no support
3. Screens suck the water out of your eyes — no support
4. Blinking stops working at night — score 4

Why: It took the question to ask why something happens (its cause). It chose option 1 with score 6, against 4 for the next best. Its support: lesson 179, line 7: «Blind cave fish have lost their eyes because in total darkness eyes are useless and making them costs energy; Mexican cave fish have river relatives with eyes.», reached through the option's own match among the sentences about the question's things. What matched: the same action «make» (+3); the same thing acted on «eyes» (+3). The right option, 2, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 10 · wrong ✗

Your eye has a blind spot. Why do you not see a hole in the world?

1. Only old people have a blind spot — no support
2. The other ear covers it — no support
3. The brain fills it in so you never notice — ✓ the right answer · score 3
4. The blind spot moves around too fast for you to see it — ← Mova's choice · score 6

Why: It took the question to ask why something happens (its cause). It chose option 4 with score 6, against 3 for the next best. Its support: lesson 136, line 3: «Walk behind a tiger and you will see a white spot on the back of each black ear, which may help cubs follow their mother through tall grass.», reached through the option's own match among the sentences about the question's things. What matched: the same action «see» (+3); the same thing acted on «white spot» (+3). The right option, 3, scored 3. · the question and its options parsed, with trees and pragmatics

Test 11 · wrong ✗

You stub your toe: first a sharp «ow!», then a slow dull ache. Why two waves?

1. The toe hurts twice because it bounces back off the door — ← Mova's choice · score 6
2. The brain forgets the first pain — no support
3. The second pain is from the other foot — no support
4. The messages travel along different nerves at different speeds — ✓ the right answer · no support

Why: It took the question to ask which statement is true. It chose option 1 with score 6, the only option with support. Its support: lesson 260, line 19: «Fat wraps fast nerves like insulation on a wire, and a stubbed toe hurts in two waves: a sharp first pain and a slower dull ache, because the two messages trav…», reached through the option's own match among the sentences about the question's things. What matched: the same action «hurt» (+4); the same doer «stubbed toe» (+2). The right option, 4, 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 advantage conferred by a reflex action upon the withdrawal of the hand from a hot object.

1. The order to withdraw is issued by the spinal cord without awaiting the brain, whereby time is saved — ✓ the right answer · score 4
2. The eyes direct the hand without the involvement of nerves, observing the heat and commanding the muscles directly — no support
3. The hand possesses an independent capacity for thought — no support
4. The sensation of pain arrives prior to any movement — ← Mova's choice · score 5

Why: It took the question to ask which statement is true. It chose option 4 with score 5, against 4 for the next best. Its support: lesson 260, line 3: «Touch a hot pan and your hand jerks away before you even feel the pain: the message takes a shortcut through the spinal cord, which sends the «pull away» order…», reached through the option's own match among the sentences about the question's things. What matched: the same action «feel» (+4); the same thing acted on «pain» (+1). The right option, 1, scored 4. · 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 proportion of the brain employed by a human being.

1. Only the left hemisphere is employed by adults — ← Mova's choice · no support
2. The brain is wholly inactive during sleep — no support
3. All regions of the brain are employed, although not all simultaneously — ✓ the right answer · no support
4. Merely ten percent of the brain is ever employed — 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 3 · formal language · wrong ✗

Which of the following statements most accurately characterises the control exercised by each half of the brain over the body?

1. The left half governs the whole body during the day, the right half during the night — score 0
2. Each half governs the same side of the body — ← Mova's choice · score 4
3. Each half governs principally the opposite side of the body, the nerves crossing in the brainstem — ✓ the right answer · score 4
4. The halves operate in complete independence of one another, exchanging no messages — score 0

Why: It took the question to ask who or what does it. 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 260, line 11: «The left half of the brain controls the right side of the body and the right half controls the left, because nerves cross over in the brainstem, the stalk that…», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «right side» (+2); it fills the role the question asks for (+2); the same doer «left half» (+1). Against it: a different action (counts against) (-1). The right option, 3, scored 4. · the question and its options parsed, with trees and pragmatics

Exam question 4 · formal language · wrong ✗

Ascertain the reason for which a person is unable to tickle himself.

1. The skin is insensible to the touch of the same body — ← Mova's choice · no support
2. The brain anticipates the sensation of his own touch and diminishes it — ✓ the right answer · no support
3. The fingers lack the necessary warmth — no support
4. Tickling is possible only during sleep — 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/260-human-body-deeper-the-brain-and-nerves/