Shadowing-Übung: Parts of the Eukaryotic Cell - Englisch Sprechen Lernen mit Video
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All cells
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have a few things in common, including the cell membrane.
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Cell membranes and all membrane-bound organelles are made up almost entirely of lipids.
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Lipids are a broad category of fatty macromolecules, which include oils, waxes, triglycerides, and phospholipids.
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Phospholipids are the major component of cell membranes and membrane-bound organelles.
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Triglycerides are fats and oils, also known as saturated and unsaturated fats.
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Waxes, like your earwax, are protective, lubricating substances.
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And sterols, like cholesterol or steroids, are used for cell wall integrity and for making hormones.
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So let's look at the cell membrane up close and see some of those lipids in action.
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The cell membrane is made mostly of phospholipids, which form a double layer called the phospholipid bilayer.
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The round heads of the phospholipids are polar and hydrophilic, which means that they are water-loving.
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The tails are nonpolar or hydrophobic, which means they are water-fearing.
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This is why they form a bilayer, which keeps the polar heads in the water and the nonpolar tails away from it.
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Another lipid, cholesterol, is a key part of the cell membrane, keeping it together while still allowing the proteins to move around.
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There are three basic types of membrane proteins as well.
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Recognition proteins, which tell the cell who it is and where it is.
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Receptor proteins, which can pick up signals.
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And transport proteins, which can move chemicals in and out of the cell.
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Those three proteins are also integral proteins because they're integrated into the lipid bilayer.
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This pink-colored protein that's on the edge of the membrane is called a peripheral protein, just like your peripheral vision is at the edge of your vision, peripheral proteins on the edge of the membrane.
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The proteins all create a speckled mosaic appearance on the membrane, but they aren't locked into one place.
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They can move around through the phospholipids.
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Because of this, we say the cell membrane is a fluid mosaic.
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The mitochondria are sometimes called the powerhouse of the cell.
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They transfer energy from organic molecules into ATP, which powers almost all reactions in the cell.
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Because mitochondria are the energy producers, you can expect to find more mitochondria in cells that do more work, like muscle cells.
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The mitochondria has an outer and an inner membrane.
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The inner membrane is bunched and folded, and the folds are called cristae.
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Inside the cristae, and between the inner and outer membrane, is a fluid called the matrix.
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Because mitochondria are small and also have their own DNA, some scientists think that mitochondria may have developed from prokaryotes like bacteria.
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Ribosomes are small structures that are responsible for building protein.
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They have no membrane like other organelles and are just made of protein and RNA.
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You can find ribosomes on the rough ER or floating around in the cytoplasm.
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The endoplasmic reticulum is a transportation highway which has two parts, rough and smooth.
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The rough ER produces phospholipids in proteins and is covered in ribosomes.
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The smooth ER produces lipids, such as cholesterol.
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You can tell it apart from the rough ER because it has no ribosomes on it and it's more tubular than flat.
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The Golgi apparatus, which is also known as the Golgi body, modifies many cellular products that it receives from the endoplasmic reticulum,
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and it prepares them for export to other regions of the cell or out of the cell entirely.
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You can tell the Golgi apparatus from the ER
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because it doesn't have ribosomes on it and it's further away from the nucleus.
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Lysosomes are vesicles that are made from the Golgi apparatus that contain digestive enzymes.
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These enzymes will help break down unwanted substances.
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The cytoskeleton is a network of tubes and filaments that give shape and structure to the cell, just like your bones give your body shape and structure.
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Centrioles are short cylinders of microtubules that exist in pairs
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and are used in animal cells to organize microtubules during cell division so that the chromosomes will divide evenly.
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This cell image has a flagella, which is a long whip-like tail for motion, but it doesn't have any cilia.
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Cilia are smaller versions of flagella and they can be used for propulsion
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or as a way to increase surface area for things like absorbing food in your intestines.
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The nucleus contains the DNA, but it's actually made of three more specific parts.
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The nuclear membrane is a double membrane that has little pores
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that provide passageways for RNA and other materials to go in and out, but the pores aren't big enough for the DNA to move out.
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Inside the nucleus is the DNA in the form of a thread-like material called chromatin.
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has the instructions for the structure and function of the organism.
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The nucleolus is the dense, round area in the nucleus, where the DNA is concentrated to build ribosomes.
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So those are the parts of the eukaryotic cell that most have in common.
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Next time we'll look at special parts that the plant cells have in addition to these.
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Thank you.
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Wortschatz und Sprechhinweise zu dieser Lektion
Diese Sprechübung auf Niveau C1 basiert auf dem Video „Parts of the Eukaryotic Cell“. Diese Wörter kommen am häufigsten vor: cell, membrane, protein, phospholipid, lipid. Dieses Video enthält 58 Sätze und 847 Wörter zum Nachsprechen. Der gesprochene Teil dauert 5:32. Der Sprecher spricht in natürlichem Tempo, etwa 153 Wörter pro Minute, ähnlich wie im Alltagsgespräch. Nur 73 % der Wörter gehören zu den 3.000 häufigsten im Englischen, der Wortschatz ist also anspruchsvoll.
Wichtiger Wortschatz in diesem Video
Die 15 anspruchsvollsten Wörter aus dem Video, mit Aussprache und Bedeutung:
| Wort | Aussprache | Bedeutung |
|---|---|---|
| membrane Substantiv | /ˈmɛm.bɹeɪn/ | Membran, Membrane |
| phospholipid Substantiv | /ˌfɑs.foʊˈlɪ.pɪd/ | Phospholipid |
| lipid Substantiv | /ˈlɪpɪd/ | Lipid |
| mitochondrion Substantiv | /ˌmaɪtəˈkɑndɹiən/ | Mitochondrium, Mitochondrion |
| ribosome Substantiv | /ˈɹaɪbəˌsoʊm/ | Ribosom |
| nucleus Substantiv | /ˈnuː.kli.əs/ | Kern |
| organelle Substantiv | /ˌɔɹ.ɡənˈɛl/ | Organell, Organelle |
| peripheral Adjektiv | /pəˈɹɪf(ə)ɹ(ə)l/ | umliegend, peripher |
| cholesterol Substantiv | /kəˈlɛstəɹɒl/ | Cholesterin |
| apparatus Substantiv | /ˌæp.əˈɹeɪ.təs/ | Apparat |
| endoplasmic Adjektiv | endoplasmatisch | |
| flagellum Substantiv | /fləˈd͡ʒɛləm/ | Geißel, Flagellum |
| microtubule Substantiv | Mikrotubulus | |
| pore Substantiv | /poɹ/ | Pore |
| reticulum Substantiv | Retikulum |
Phrasal Verbs, die du hören wirst
| Wort | Aussprache | Bedeutung |
|---|---|---|
| break down Verb | versagen, den Geist aufgeben | |
| make up Verb | /ˌmeɪk ˈʌp/ | wiedergutmachen, kompensieren |
| move out Verb | ausziehen | |
| pick up Verb | aufheben, aufnehmen |
Grammatik in diesem Video
Die Strukturen, die der Sprecher am häufigsten verwendet, mit den genauen Worten aus dem Video:
| Struktur | Im Video |
|---|---|
| Passiv be + Partizip Perfekt – wichtig ist, was geschieht, nicht wer es tut | are made · are used · is made |
| Relativsätze who / which + Satz – eine Zusatzinformation über eine Person oder Sache | hydrophilic, which means · hydrophobic, which means · proteins, which can |
Aussprache, auf die du achten solltest
Der Sprecher verwendet 6 Kurzformen und abgeschwächte Formen, zum Beispiel aren't, doesn't, they're. Sprich sie in der kurzen Form, so wie du sie hörst.
- Lange Wörter – auf die Betonung achten: phospholipid /ˌfɑs.foʊˈlɪ.pɪd/, mitochondrion /ˌmaɪtəˈkɑndɹiən/, peripheral /pəˈɹɪf(ə)ɹ(ə)l/, cholesterol /kəˈlɛstəɹɒl/, apparatus /ˌæp.əˈɹeɪ.təs/
Laute, die Deutschsprachigen schwerfallen:
- /w/ — mit runden Lippen, nicht wie das deutsche „w“ (/v/): wax /waks/, earwax /ˈiɹ.wæks/, passageway /ˈpæ.sɪdʒˌweɪ/, unwanted /ʌnˈwɒntɪd/, whip /ˈwɪp/
- Stimmhafter Auslaut — /b/, /d/, /g/, /z/, /v/ am Wortende nicht verhärten: phospholipid /ˌfɑs.foʊˈlɪ.pɪd/, lipid /ˈlɪpɪd/, triglyceride /tɹaɪˈɡlɪsəɹaɪd/, bind /ˈbaɪ̯nd/, fold /ˈfəʊld/
- /æ/ — offener als „ä“: apparatus /ˌæp.əˈɹeɪ.təs/, bacterium /bækˈtɪəɹ.ɪəm/, cytoplasm /ˈsaɪtəʊˌplæzəm/, earwax /ˈiɹ.wæks/, macromolecule /ˈmækɹəʊˌmɒlɪkjuːl/
So übst du mit diesem Video
- Höre dir das ganze Video einmal an, ohne zu sprechen, und notiere die Wörter, die du nicht kennst.
- Beginne mit 0,75-facher Geschwindigkeit, sprich Satz für Satz nach und wechsle zur normalen Geschwindigkeit, sobald es leichtfällt.
- Nimm dich auf und vergleiche mit dem Original; achte dabei auf Wörter wie membrane, phospholipid, lipid.
Was ist die Shadowing-Technik?
Shadowing ist eine wissenschaftlich fundierte Sprachlerntechnik, die ursprünglich für die professionelle Dolmetscherausbildung entwickelt und durch den Polyglotten Dr. Alexander Arguelles populär gemacht wurde. Die Methode ist einfach aber wirkungsvoll: Du hörst englisches Audio von Muttersprachlern und wiederholst es sofort laut — wie ein Schatten, der dem Sprecher mit nur 1–2 Sekunden Verzögerung folgt. Anders als passives Hören oder Grammatikübungen zwingt Shadowing dein Gehirn und deine Mundmuskulatur, gleichzeitig echte Sprachmuster zu verarbeiten und zu reproduzieren. Studien zeigen, dass es Aussprachegenauigkeit, Intonation, Rhythmus, verbundene Sprache, Hörverständnis und Sprechflüssigkeit signifikant verbessert — was es zu einer der effektivsten Methoden für die IELTS Speaking-Vorbereitung und reale englische Kommunikation macht.