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Cell Biology

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Live Voice Lesson

Have an AI tutor teach you.

It talks you through concepts using your own study material. Interrupt whenever you want, or ask it to explain something a different way.

First-pass metabolism · Pharmacology

12:07 left

End

3 of 5 · Why the oral dose is larger

Listening

A tablet has to go through the gut wall and then straight through the liver before any of it reaches the rest of you. The liver takes a cut on the way past, and what is left is the bioavailable fraction.

YouSo an injection skips all of that?

It does. Straight into the blood, nothing taken off, which is why the oral dose of the same drug is the larger of the two.

Drawings

Ask it to draw the thing.

When a curve or a diagram explains it faster than words, the tutor draws one beside what it is saying and you can drag it about until it makes sense. It stays with the Lesson, so it is still there and still working when you come back to it.

Standard deviation · Research Methods

8:41 left

End

Two classes can sit the same paper, average the same mark, and feel nothing alike. Widen the spread and watch what stays inside the band.

Same average, different spread

Drag the spread. About 68% of the class is always inside one deviation.

spread 12
mean 6068% of the class

Past papers

Learn how the question is answered.

Upload a past paper and work through it a line at a time. Every line comes with the reason you are allowed to write it, so next year's paper is a question you have seen the shape of rather than one you have not.

Question 3 (b) · 5 marks

Circle geometry

Paper

TA is a tangent at A. Angle TAB = 62°, angle ABC = 48°. Determine, with reasons, the size of angle BAC.

angle ACB = angle TAB = 62°

Tan-chord: the angle between a tangent and a chord equals the angle in the alternate segment.

angle BAC + 48° + 62° = 180°

Angles in triangle ABC add up to 180°.

Next: solve for the angle asked for

Write your line first, then see how it is set out and why.

Quick Quiz

Test your understanding.

Pick a quiz type (multiple choice, fill in the blank, true or false, or a mix) and answer five, ten or fifteen questions from your own study material.

Question 4 of 10

Quick Quiz

Leave

A firm in perfect competition is producing where marginal cost is above marginal revenue. What should it do?

  • aRaise its priceYou

    It cannot. A price taker sells at the market price or sells nothing.

  • bReduce output

    Each extra unit is costing more than it earns, so the last ones are losing money.

  • cLeave the market

Profit is at its highest where marginal cost equals marginal revenue. Above it, cutting output raises profit.

  • Lecture 6 Perfect Competition.pdf · page 22Open

Mistakes

Go back to what you got wrong.

Every question you miss in a quiz is kept, with what you said and what the material says, grouped by what it was testing. Work through only those; they drop off once you get them right.

Mistakes · Organic Chemistry

4 kept

SN1 and SN2 mechanisms

Revisit
  • Which substrate favours SN1×3

    You: Primary alkyl halide

    Tertiary. The carbocation is stabilised by three alkyl groups.

  • Effect of a polar aprotic solvent

    You: Slows the reaction down

    It speeds SN2 up by leaving the nucleophile unsolvated.

Flashcards

A deck for every concept.

Drill the terms and definitions until they stick, in the ten minutes before a tut. The ones you keep missing come back sooner; the ones you know stop taking up time.

Brachial plexus · Anatomy

Card 2 of 14

Leave

Got itMissed it

Sources

See the page it came from.

Every concept, question and card carries where it came from: page 148, or 14:20 in the recording. Open it and you are looking at that passage.

Chapter 12 Elasticity of Demand.pdf

Page 148 of 320

Leave

12.3 Price elasticity of demand

Sections

  • Determinants of demandpage 141
  • Price elasticitypage 148
  • Cross elasticitypage 155
  • Income elasticitypage 161

Today

Know what to open first.

The Today tab picks a few concepts and says why each is there: a review is due, this one caught you out twice, the exam is close. Spaced repetition, without a schedule to keep.

Today · Biochemistry

3 worth a look

Krebs cycle regulation

Learning

This one has caught you out a few times recently.

Enzyme inhibition

Review due

A review is due. It has been 12 days.

Glycolysis: the rate-limiting steps

New

New from Lecture 9. No history yet.

Today says what deserves attention. You choose Lesson, Quiz, Flashcards or Sources.

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  • 30 Voice Lesson minutes, once-off

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FAQ

What can I put into it?

Lecture slides, textbook chapters, past papers, a website, or a YouTube lecture. PDFs up to 1000 pages and videos up to 4 hours. Each one keeps its page numbers or timestamps, so anything SymbioLearn tells you can be traced back to the page it came from.

How is this different from asking ChatGPT?

It works from what you put in. Every question, correction and explanation is written from a passage in your own material and shows you which passage, so you can open it and check rather than take its word for it.

What is included on the free plan?

One module, 5 sources in it at a time, 5 quizzes a week, flashcards, and 30 Live Voice Lesson minutes. The 30 minutes are a one-off allowance rather than a monthly one, so they are there to try Lessons properly. No card.

How are Live Voice Lesson minutes counted?

By connected conversation time, measured on our servers and rounded up to the nearest minute. When they run out, Lessons stop starting; concepts, quizzes, flashcards and Today carry on. Top-ups are 60 minutes for $5 or 180 for $12, they do not expire, and included minutes are spent first.

Can I cancel Pro?

Yes, from your account, whenever you want. Pro runs to the end of the period you paid for, then the Free limits apply again. Your modules, sources and history stay where they are.

What happens to the files I upload?

They go into private storage only your account can reach, and stay openable as Sources. We extract the text to find the concepts in it. Your material is not used to train models, and it is not used to answer anyone else's question. Deleting a Source removes the file and its text; deleting a module removes everything in it.

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