Muscles and joints by name: biceps, triceps, knees, elbows and the busiest muscles

Tests: 4 of 12 right · Exam: 1 of 4 right · Kind: ★★★ · Understood: 8 of 16 · Run: 2026-10-18, commit f3c23ea72

Lesson 360 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 Popeye cartoon Popeye swallows a can of spinach and his biceps swell up like a ball in a second. What is the truth?

1. Muscles never grow stronger — ← Mova's choice · no support
2. Spinach really grows muscle in seconds — no support
3. Muscles grow stronger slowly over weeks of use, and no food does that in seconds — ✓ the right answer · no support
4. Only the biceps can grow at all — 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 2 · ★★★ · right ✓

«my muscles push the arm up, obviously» What is right?

1. Yes, the triceps pushes from below — no support
2. No, the bones push themselves — no support
3. No, muscles only pull; the biceps pulls the arm up — ← Mova's choice · ✓ the right answer · score 1
4. Yes, obviously, the biceps pushes the arm up from inside — score 1

Why: It took the question to ask which statement is true. It chose option 3 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 11: «Muscles can only pull, not push, so they work in pairs, like the biceps that bends the arm and the triceps that straightens it.», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «arm» (+1). · the question and its options parsed, with trees and pragmatics

Test 3 · ★★★ · wrong ✗

Count them: a heart beats about 100,000 times a day. About how many times is that in a week?

1. About 7 million — ← Mova's choice · score 5
2. About 700,000 — ✓ the right answer · score 5
3. About 100,000 — score 5
4. About 70,000 — score 5

Why: It took the question to ask what it is done to. It chose option 1 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 120, line 15: «Mice use pipes, cables and gaps behind kitchen units as hidden roads, and may visit the same food many times in a night, taking only tiny bits each time.», reached through the remembered sentence the question matched. What matched: the same property (+2); the same circumstance (+2); a different thing acted on (counts against) (+1). The right option, 2, scored 5. · the question and its options parsed, with trees and pragmatics

Test 4 · ★★★ · wrong ✗

Count them: a skier's two knees and two elbows are all hinge joints. How many hinge joints is that?

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

What would happen if your triceps stopped working but your biceps still worked?

1. Nothing would change — no support
2. Your arm would bend backwards — ← Mova's choice · score 7
3. You could not bend it at all — score 0
4. You could bend your arm but could not straighten it with force — ✓ the right answer · score 7

Why: It took the question to ask what happens next. It chose option 2 with score 7, tied with another option at 7 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 360, line 6: «Muscles can only pull, never push, so they work in pairs: the biceps bends the elbow and the triceps straightens it.», reached through what followed the sentence the question matched. What matched: the same action «bend» (+6); a different doer (counts against) (+1). The right option, 4, scored 7. · the question and its options parsed, with trees and pragmatics

Test 6 · ★★★ · right ✓

«cramp in me calf, it's killing me, what do I do» What usually helps?

1. Run faster to shake it off — no support
2. Bend the leg as tight as you can — no support
3. Gently stretch the calf until it lets go — ← Mova's choice · ✓ the right answer · score 8
4. Punch the muscle hard a few times to knock it loose — no support

Why: It took the question to ask what is done. It chose option 3 with score 8, the only option with support. Its support: lesson 360, line 14: «A cramp is a muscle squeezing hard and not letting go; it is common after exercise, and gently stretching the muscle usually helps.», reached through the same lesson line as the sentence the question matched. What matched: it fills the role the question asks for (+4); the same action «stretch» (+3); the same property (+3). Against it: a different thing acted on (counts against) (-2). · the question and its options parsed, with trees and pragmatics

Test 7 · ★★★ · wrong ✗

«sitting all day on me biggest muscle lol, which is it» Which muscle is it?

1. The triceps — ← Mova's choice · no support
2. The gluteus maximus — ✓ the right answer · no support
3. The heart — no support
4. The biceps — 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 8 · ★★★ · right ✓

A footballer twists his knee and tears a ligament. What has been damaged?

1. A strap that holds the knee bones together — ← Mova's choice · ✓ the right answer · no support
2. The kneecap bone itself — no support
3. The big muscle at the front of his thigh — no support
4. The tendon joining calf to heel — 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 · ★★★ · wrong ✗

Why do astronauts on the space station exercise about two hours a day?

1. They are training for races on Earth — ← Mova's choice · no support
2. Without gravity to work against, their muscles would waste away — ✓ the right answer · no support
3. Exercise makes air to breathe — no support
4. Exercise keeps the station warm — 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 · ★★★ · wrong ✗

In a cartoon Jerry ties Tom's tail in a bow and Tom's leg bends backwards at the knee. What is true about a real knee?

1. It can bend any way it likes, like a ball in a socket — ← Mova's choice · no support
2. It is a pivot and spins round — no support
3. It is a hinge, so it bends one way only — ✓ the right answer · no support
4. It has no ligaments at all — 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 boy can shake his head «no» and nod «yes». Which joint at the top of the neck lets him shake it «no»?

1. A ball-and-socket like the hip — no support
2. A pivot joint — ← Mova's choice · ✓ the right answer · score 3
3. A hinge joint like the knee — score 3
4. A fused joint — score 3

Why: It took the question to ask who or what does it. It chose option 2 with score 3, tied with another option at 3 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 360, line 3: «Where two bones meet there is a joint, and each kind moves differently: the elbow and knee are hinges like a door, the shoulder and hip are balls in sockets, a…», reached through the same lesson line as the sentence the question matched. What matched: it fills the role the question asks for (+2); the same doer «joint» (+1). · the question and its options parsed, with trees and pragmatics

Test 12 · ★★★ · wrong ✗

Why would the heart be built from a special muscle and not the kind in your arm?

1. It is too small for arm muscle — score 2
2. It needs to push, not pull — score 4
3. Arm muscle cannot hold blood — ← Mova's choice · score 5
4. It must keep beating all life without stopping to rest — ✓ the right answer · score 5

Why: It took the question to ask why something happens (its cause). It chose option 3 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 357, line 8: «The hyoid is a small horseshoe-shaped bone in the throat that is joined to no other bone; it is held by muscles and helps you swallow and speak.», reached through the option's own match among the sentences about the question's things. What matched: the same action «hold» (+2); the same doer «muscles» (+1); a different thing acted on (counts against) (+1); one says «not», the other does not (counts against) (+1). The right option, 4, scored 5. · the question and its options parsed, with trees and pragmatics

Exam question 1 · formal language · wrong ✗

Which of the following statements most accurately characterises the action of a skeletal muscle?

1. It is capable solely of contraction, by which it exerts a pull — ✓ the right answer · no support
2. It is incapable of motion, the bones moving of their own accord — ← Mova's choice · score 3
3. It is capable solely of exerting a push — no support
4. It exerts a push and a pull with equal facility — no support

Why: It took the question to ask who or what does it. It chose option 2 with score 3, the only option with support. Its support: lesson 360, line 1: «Bones cannot move themselves; muscles move them, and a muscle can do only one thing: shorten and pull. It can never push.», reached through the same lesson line as the sentence the question matched. What matched: the same action «move» (+3); it fills the role the question asks for (+2); the same doer «bones» (+1). Against it: one says «not», the other does not (counts against) (-3). The right option, 1, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Exam question 2 · formal language · wrong ✗

Identify the muscle principally responsible for the flexion of the arm at the elbow.

1. The gluteus maximus — ← Mova's choice · no support
2. The biceps — ✓ the right answer · no support
3. The triceps — no support
4. The muscle of the calf — 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 · right ✓

Select the response consistent with the established facts concerning the function of ligaments.

1. Ligaments supply blood to the joints — no support
2. Ligaments join muscle to bone — no support
3. Ligaments convey impulses to the brain — no support
4. Ligaments join bone to bone at a joint — ← Mova's choice · ✓ the right answer · score 3

Why: It took the question to ask which statement is true. It chose option 4 with score 3, the only option with support. Its support: lesson 353, line 1: «Your skin is an organ, like your heart or lungs, and it is the biggest one you have: a waterproof, germ-proof, self-repairing coat that also helps keep your te…», reached through the option's own match among the sentences about the question's things. What matched: the same circumstance (+3); the same thing acted on «biggest one» (+1). Against it: a different doer (counts against) (-1). · the question and its options parsed, with trees and pragmatics

Exam question 4 · formal language · wrong ✗

Ascertain the approximate number of beats executed by the human heart in the course of a single day.

1. One thousand — ← Mova's choice · no support
2. Ten million — no support
3. One hundred — no support
4. One hundred thousand — ✓ 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/360-muscles-and-joints-by-name-biceps-triceps-knees-elbows-and-the-busiest-muscles/