Shadowing Practice: 2-Minute Neuroscience: Leptin & Ghrelin - Learn English Speaking with Video
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16 sentences
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1
Leptin and ghrelin are two hormones that exert opposing influences in the regulation of appetite and energy balance.
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Leptin is produced mainly by fat cells, and circulating leptin levels increase as body fat increases, reflecting the amount of stored energy in the body.
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Leptin acts on receptors in several brain regions,
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most notably the hypothalamus, where it suppresses food intake by inhibiting appetite -stimulating neurons and activating neurons that reduce feeding behavior.
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Ghrelin is produced mainly by the stomach, and is released when energy availability is low, such as during a period of fasting.
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Ghrelin levels typically rise before meals and fall after eating, and thus may play an important role as a short -term driver of hunger and feeding.
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Ghrelin also exerts many of its effects through receptors in the hypothalamus, where it activates neurons that promote feeding behavior.
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Ghrelin may also influence the reward system, which could increase food intake for the sake of pleasure, independent of energy availability.
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In general, leptin inhibits hunger and ghrelin stimulates it,
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and the balance between the two forms part of a broader system that helps regulate feeding behavior and body weight.
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When we lose weight, for example, ghrelin levels tend to increase and leptin decreases,
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mechanisms that are thought to help us maintain a consistent weight over time.
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The role of leptin and ghrelin in obesity, however, is still unclear.
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Leptin levels in obesity are higher than normal, but the brain is often less responsive to leptin, a phenomenon called leptin resistance.
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Ghrelin levels are typically lower in people with obesity, and do not fall as significantly after a meal, nor rise as much before a meal.
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It's possible these more stable ghrelin levels could result in less restricted eating periods and contribute to obesity, but more research is needed to confirm this.
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Vocabulary and speaking notes for this lesson
This speaking lesson is built on the video “2-Minute Neuroscience: Leptin & Ghrelin”. The speaker keeps coming back to these words: ghrelin, leptin, levels, obesity, feeding. This video has 16 sentences and 302 words to shadow. The speech runs for 1:50. The speaker talks at a natural 165 words per minute, close to everyday conversation. Only 71% of the words are among the 3,000 most common in English, so the vocabulary is demanding.
Key vocabulary in this video
15 words from the video worth learning, with pronunciation and meaning:
| Word | Pronunciation | Meaning |
|---|---|---|
| obesity noun | /ə(ʊ)ˈbiːsɪti/ | The state of being obese. |
| meal noun | /ˈmiːl/ | Food that is prepared and eaten, usually at a specific time, and usually in a comparatively large quantity. |
| availability noun | /əˌveɪ.ləˈbɪl.ɪ.ti/ | The quality of being available. |
| hunger noun | /ˈhʌŋɡɚ/ | A need or compelling desire for food. |
| intake noun | /ˈɪnteɪk/ | The place where water, air or other fluid is taken into a pipe or conduit; opposed to outlet. |
| appetite noun | /ˈæp.əˌtaɪt/ | A desire to eat food or consume drinks. |
| receptor noun | /ɹɪˈsɛp.tə/ | A protein on a cell wall that binds with specific molecules so that they can be absorbed into the cell in order to control certain functions. |
| activate verb | /ˈæktɪˌveɪt/ | To encourage development or induce increased activity; to stimulate. |
| stimulate verb | /ˈstɪm.jəˌleɪt/ | To encourage into action. |
| consistent adjective | /kənˈsɪs.tənt/ | Of a regularly occurring, dependable nature. |
| stable noun | /ˈsteɪ.bəl/ | A building, wing or dependency set apart and adapted for lodging and feeding (and training) ungulates, especially horses. |
| stomach noun | /ˈstʌmək/ | An organ in animals that stores food in the process of digestion. |
| confirm verb | /kənˈfɝm/ | To strengthen; to make firm or resolute. |
| sake noun | /ˈseɪ̯k/ | Cause, interest or account. |
| reflect verb | /ɹɪˈflɛkt/ | To bend back (light, etc.) from a surface. |
Grammar in this video
The structures the speaker uses most, with the exact words from the video:
| Structure | In the video |
|---|---|
| Passive voice be + past participle — the focus is on what happens, not who does it | is produced · are thought · is needed |
Pronunciation to watch
- Long words — get the stress right: obesity /ə(ʊ)ˈbiːsɪti/, availability /əˌveɪ.ləˈbɪl.ɪ.ti/, regulation /ˌɹɛɡjʊˈleɪʃən/, mechanism /ˈmɛk.ə.nɪ.zəm/, phenomenon /fəˈnɒm.ɪ.nən/
How to practise with this video
- Listen to the whole video once without speaking and note the words you do not know.
- Start at 0.75× speed, shadow it sentence by sentence, then go back to normal speed once it feels easy.
- Record yourself and compare with the original, paying attention to words like obesity, meal, availability.
What is the Shadowing Technique?
Shadowing is a science-backed language learning technique originally developed for professional interpreter training and popularized by polyglot Dr. Alexander Arguelles. The method is simple but powerful: you listen to native English audio and immediately repeat it out loud — like a shadow following the speaker with just a 1–2 second delay. Unlike passive listening or grammar drills, shadowing forces your brain and mouth muscles to simultaneously process and reproduce real speech patterns. Research shows it significantly improves pronunciation accuracy, intonation, rhythm, connected speech, listening comprehension, and speaking fluency — making it one of the most effective methods for IELTS Speaking preparation and real-world English communication.