The video clip provides an introduction to the process of digestion.
The video was produced in the 1990s and some aspects are dated. There are relevant teaching points which are useful for 11-16 year olds.
A resource aimed at advanced level biology students with each step of the electron transport chain (oxidative phosphorylation) clearly and succinctly described in a series of bullet points. The challenge for students is to use this information to draw their own diagrammatic representations of each process. This resource is best used after a taught lesson on the electron transport chain and a means of recapping each point. Students should have experience in drawing out reaction pathways (e.g. in glycolysis or Kreb's cycle) before they attempt this activity. A shorter DRAW IT activity is included for both the Link reaction and Kreb's cycle as a bonus resource.
Key words: electron transport chain, final acceptor, chemiosmosis, hydrogen ions, electrons, carriers, ATP, coupled, ATPase, energy, oxidative phosphorylation
Aimed at advanced biology students, this resource leads students through the design and use of a respirometer. The first few questions deal with causes of pressure changes inside a respirometer tube and predicting the direction in which fluid within a manometer tube would flow. The worksheet then moves on to cover two different investigations - measuring the amount of oxygen consumed over time and measuring the amount of carbon dioxide produced over time. Tables for the recording of data and calculations (e.g. converting distance measurments to volumes) are provided along with questions that check understanding. The data gathered from both oxygen consumption and carbon dioxide can be plotted as graphs to calculate rate of respiration or used to calculate RQ values, indicating which respiratory substrate is being used by the organisms under test (blowfly larvae are suggested). The second worksheet in this resource deals specifically with a thermo-barometrically balanced respirometer and calculation/interpretation of RQ values.
Key words: respirometer, manometer, blowfly larvae, maggots, rate, RQ value, volume, distance, temperature, control, potassium hydroxide, thermo-barometrically balanced
A worksheet aimed at advanced biology students that aims to recap some of the basic facts about respiration and bridge the gap between GCSE ideology and advanced level study. The worksheet contains several questions that focus on a recap of the basic summary equation, reasons why the summary equation can be misleading, the nature of ATP hydrolysis, exergonic reactions and the site of different stages of aerobic respiration. There is a final synoptic challenge question that requires students to explain how glucose from our diet is transported to respiring cells. Answers to all questions are given on the second page of this worksheet.
Key words: respiration, ATP, glucose, exergonic, mitochondria, cytoplasm, aerobic, anaerobic, energy, glycolysis, link, Kreb's cycle, electron transport chain, synoptic, amylase, starch, digestion, ingestion, maltase, maltose, absorption, insulin, epithelial cell, co-transporter, sodium