Listing all results (578)

Enzymes Outside the Body *suitable for home teaching*

A Catalyst article explaining how enzymes allow chemical reactions in all living organisms to proceed quickly, under conditions where they would normally be very slow. By isolating enzymes that could be used to catalyze reactions, scientists have started a major biotechnology industry. The article describes how...

Catalysts *suitable for home teaching*

A Catalyst article about how catalysts affect the rate of reactions and why catalysts are important in nature and in industry.

This article is from Catalyst: Secondary Science Review 2008, Volume 18, Issue 3.

Catalyst is a science magazine...

Photosynthesis *suitable for home teaching*

This Catalyst article looks at the process of photosynthesis, by which plants make a range of biochemical compounds. The article explains how photosynthesis actually ties in with growth. Respiration is happening all the time in all cells in all living organisms. Taken on its own, photosynthesis adds materials to...

Quick Reactions *suitable for home teaching*

A Catalyst article which explores how the nervous system works. Sensitivity, the ability to respond to stimulation, is a product of nervous system activity. How nerve impulses pass around the body, and why these responses are so fast are investigated in the article. Neurones, reflexes, synapses and receptors are...

Blood Pressure *suitable for home teaching*

A Catalyst article about fainting and how it can be the result of a sudden drop in blood pressure, which is often part of a shock reaction. Maintaining blood pressure is an important part of keeping the human body in balance. This article examines hypertension, living with high blood pressure, and the relationship...

Kidneys *suitable for home teaching*

A Catalyst article discussing how the human body has to handle all sorts of variations, balancing its inputs and outputs, if it is to work efficiently. The article concentrates on one organ, the kidney, and the way it helps to keep things on an even keel through the functions of homeostasis and excretion. What...

Diabetes in Young People *suitable for home teaching*

A Catalyst article about juvenile diabetes, a genetic disease also known as Type 1 diabetes, which affects over 200,000 people in the UK. Scientists are still trying to unravel its causes in order to develop improved treatments. This article describes what is being done to improve people’s understanding of the...

Keeping Things Steady *suitable for home teaching*

A Catalyst article about homeostasis describing how the process enables birds and mammals to be active on cold days when other species are not.

This article is from Catalyst: GCSE Science Review 2004, Volume 14, Issue 3.

Catalyst is a science magazine for...

Oxygen Supply *suitable for home teaching*

A Catalyst article about oxygen and how it is essential for most respiration, which goes on all the time in all live cells all living organisms. The article looks at how organisms get the oxygen they need from their surroundings and how it reaches cells. It also explores how oxygen transport is monitored, which of...

Energy Transfer *suitable for home teaching*

A Catalyst article devoted to food chains. This article looks at photosynthesis and the loss of energy from plants to animals throughout the food chain. How this limits the number of animals that can survive on the energy fixed by a patch of vegetation is explained. Foraging characteristics and how many animals can...

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