Week 15 Discussion — Capture, Then Convert — Traditional alternative (no AI)

Instructors: publish this instead of the adaptive version if you prefer, and unpublish or delete the adaptive one.

Hook

When a stuffy cold turns a favorite soup into warm water, the taste buds are still working; the aroma never reaches the olfactory epithelium, and flavor is mostly smell. Every sense works on the same plan, capture then convert, but each organ carries it out with very different structures.

Your discussion question — choose Option A or Option B; they carry the same weight and the same rubric, and you say which you picked.

Option A: Every sense organ has two jobs: capture the stimulus, then convert it into a nerve signal. Argue which sense organ does those two jobs with the better design, the eye or the ear, using the light path (cornea, pupil, lens, retina) and the sound path (eardrum, malleus, incus, stapes, oval window, cochlea), and tie your case to how you use that sense at work, at home, or in your studies. Then make the best case for the organ you did not pick.

Option B: Flavor is mostly smell: the five basic tastes combine with a food's aroma, and without smell, food tastes bland. Argue whether a menu, a recipe card, or a food label would describe food better by naming its basic tastes (sweet, salty, sour, bitter, umami) or by describing its aroma, using chemoreception, the taste buds, and the olfactory epithelium. Then name the strongest case for the other approach.

There is no single right answer here. Two careful people can rank the eye and the ear differently or prefer different food descriptions. Pick the option you care about, and walk us through your reasoning.

Expectations

Activity format: one initial post followed by two substantive peer replies. Plan on about 45 minutes across the two deadlines; your instructor sets both due dates in Canvas.

Your initial post — by the first due date (early in the module week):

• Say which option you chose.
• For Option A, say which organ has the better design, name its structures in order, and say which ones capture and which ones convert; for Option B, say which description serves food better, and use the five basic tastes, the olfactory epithelium, and the idea that flavor is mostly smell.
• Use at least two of this week's terms (cornea, lens, retina, rods, cones, tympanic membrane, cochlea, hair cells, chemoreception, flavor) correctly.
• Say what idea or demonstration would change your mind.
• Length: roughly 150–250 words if written. You may instead record your post as audio or video (about two minutes) and attach a transcript; both forms are scored by the same rubric.

Your replies — by the second due date (the end of the module week):

• Reply substantively to at least two classmates.
• A substantive reply does more than agree: make the case for the other organ or the other description, point out where a post put the light path or the ossicles out of order or called spicy a taste, or ask which structure in a post captures and which converts. "Nice point!" on its own does not count.

What a strong post looks like:

I chose Option B, and I think a menu should describe aroma. When I cook at home, the dishes I remember most are the ones that smell good before they reach the table. Taste buds in the papillae only report five basic tastes, but the olfactory epithelium adds the aroma, and flavor is mostly smell. The best case against me is that basic tastes are simpler for a diner to compare across dishes. I would change my mind if a nose-pinched tasting test showed that people still told dishes apart well.

Notice how it takes a side, names the receptors and where they sit, ties the idea to a real kitchen, and takes the strongest objection seriously. That is the bar.

Participation rubric

This discussion is worth 10 points. The three criteria below look at your initial post and your peer replies.

Post early if you can; the best threads happen when people have time to reply before the second due date.

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