Week 6 · Readings & resources

Week 6 — Readings & Resources

Introduction to Biology Free sample edition

Your primary reading is Chapter 6 (in this module). Everything below is the optional, go-deeper layer — pick what helps, skip the rest.

How to use this page

This page has 10 items (4 readings and 6 videos). Allow 70–77 minutes for everything. Each group points back to the matching chapter section and class-session segment, so use the full menu when you want more, or take the quick path below.

Every video here has captions: turn them on with the CC button in the player. The chapter covers the same ideas in text.

Pick-one quick path (19–21 min total)

① What goes in, what comes out

Chapter 6, Section “Read the overall equation both ways” · Session 1, Segment 2, “The recipe card” · Remember: glucose and oxygen go in, and carbon dioxide, water, and ATP come out, with every atom accounted for.

When we lose weight, where does it go? — The Conversation — a short news explainer on why most of the mass of lost fat leaves through your lungs as carbon dioxide, with the rest leaving as water; it carries its own figures and some diet advice, so focus on the in-and-out chemistry the chapter teaches. Use it while working through the Week-6 module overview. (reading, 5–7 min)
Where does fat go when you lose weight? — Wayne Breslyn (Dr. B.) — a two-minute whiteboard explanation of the same puzzle, showing burned fat leaving as carbon dioxide and water; it writes out a long formula for a fat molecule, and you need only the idea, not the formula. (video, 2 min) (captions: automatic)

② The four stages, in order and in place

Chapter 6, Section “Cash in at the electron transport chain” · Session 2, Segment 7, “The electron transport chain: cashing in” · Remember: glycolysis runs in the cytoplasm, then pyruvate oxidation, the cycle in the matrix, and the chain on the inner membrane, with oxygen at the very end.

Mitochondria – cell powerhouses — Science Learning Hub — a plain-language article on the organelle where most of the pathway runs, from glucose split in the cytoplasm to carbon dioxide and water inside the mitochondrion; read the opening sections and skip the later parts on free radicals, antioxidants, and diet, which this course does not cover. This builds on Week 5's work with ATP as the cell's energy currency. (reading, 5–7 min)
Cellular Respiration: Do Cells Breathe?: Crash Course Biology #27 — CrashCourse — a lively episode that walks the mitochondrion, glycolysis, the citric acid cycle, and the electron transport chain in the same order as the chapter; pause at each stage and name the place in the cell where it runs. Stop here before photosynthesis; next week takes that up. (video, 14 min) (captions: creator)
Cellular Respiration — Bozeman Science — a calm whiteboard walk through aerobic and anaerobic respiration, the parts of the mitochondrion, the stages that recharge ATP, and both kinds of fermentation; it calls the third stage the Krebs cycle, the chapter's other name for the citric acid cycle. (video, 14 min) (captions: creator)
Cellular Respiration: How Do Cells Get Energy? — Science ABC — an animated explainer that opens with a burning-potato comparison and follows glucose through glycolysis, the Krebs cycle, and the electron transport chain; it counts three steps where the chapter counts four, because it folds pyruvate oxidation into the cycle, and it adds a poison example the chapter leaves out. (video, 9 min) (captions: creator)

③ Fermentation and the yeast balloons

Chapter 6, Section “Fall back on fermentation when oxygen runs out” · Session 2, Segment 9, “Fermentation: the backup” · Remember: without oxygen, fermentation keeps glycolysis running for only 2 ATP per glucose, making lactic acid in muscle or ethanol and carbon dioxide in yeast.

Lactic Acid & Alcoholic Fermentation — HeyNowScience — a classroom-style comparison of the two side paths, what pyruvate becomes in each, and where each one runs; sort each example it gives into muscle-type or yeast-type fermentation as you watch. (video, 8 min) (captions: automatic)
Fermentation of Yeast & Sugar - The Sci Guys: Science at Home — The Sci Guys — a short home demonstration of yeast, sugar, and a balloon, close to this week's lab; watch for which bottle stays flat and say which gas fills the others. (video, 4 min) (captions: automatic)
Experiment: Yeasty beasties — Science News Explores — a full at-home yeast experiment that changes what is added to the sugar water and measures the gas each bottle makes; its water-only bottle plays the same role as the 0-teaspoon control in the yeast balloon example. (reading, 8–10 min)

Optional one-stop reference (free online reference)

Mitochondria — National Human Genome Research Institute Talking Glossary — the course's free glossary of genetic terms, open at its entry for mitochondria; read the definition and the short narration text, and skip the line on how mitochondrial DNA is inherited, which reaches beyond this week. (reading, 1–2 min)

Heads-up (links rot): these point to outside sites that occasionally move or rename pages. If a link ever fails, tell your instructor and use the reference above in the meantime.

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