Vernier Software & Technology

# Effect of Temperature on Cold-Blooded Organisms

## Introduction

In cold-blooded organisms, poikilotherms, there is a link between the temperature of the environment and the organism’s metabolic rate. Reptiles are a common example of a cold-blooded organism with which most people are familiar. If you have ever seen a lizard or snake in the early morning when the air and ground are cool, you may have noticed how slowly they move. They move slow when the environment is cold because they require heat from their surroundings to increase their internal temperature and metabolism. Once their internal body temperature has warmed, they can metabolize foods more quickly and produce the energy they need. Oxidative respiration is the process of metabolism where sugars are broken down. Under aerobic conditions, respiration yields chemical energy, carbon dioxide, and water.

${{\text{C}}_{\text{6}}}{{\text{H}}_{{\text{12}}}}{{\text{O}}_{\text{6}}}{\text{ + 6 }}{{\text{O}}_{\text{2}}} \to {\text{6 C}}{{\text{O}}_{\text{2}}}{\text{ + 6 }}{{\text{H}}_{\text{2}}}{\text{O + energy}}$
${\text{glucose + oxygen}} \to {\text{carbon dioxide + water + energy}}$

Crickets will be used to study the effect of temperature on the metabolism of cold-blooded organisms. You will determine how temperature affects the respiration rate of crickets by monitoring oxygen gas consumption with an O2 Gas Sensor.

## Objectives

In this experiment, you will

• Use an O2 Gas Sensor to measure concentrations of oxygen gas.
• Determine the rate of respiration by crickets at different temperatures.
• Determine the effect of temperature on metabolism of crickets.

## Sensors and Equipment

This experiment features the following Vernier sensors and equipment.

### Additional Requirements

You may also need an interface and software for data collection. What do I need for data collection?

## Biology with Vernier

See other experiments from the lab book.

 1 Energy in Food 2 Limitations on Cell Size: Surface Area to Volume 3 Acids and Bases 4 Diffusion through Membranes 5 Conducting Solutions 6A Enzyme Action: Testing Catalase Activity 6B Enzyme Action: Testing Catalase Activity 7 Photosynthesis 8 The Effect of Alcohol on Biological Membranes 9 Biological Membranes 10 Transpiration 11A Cell Respiration (O2) 11B Cell Respiration (CO2) 11C Cell Respiration (Pressure) 11D Cell Respiration (CO2 and O2) 12A Respiration of Sugars by Yeast 12B Sugar Fermentation 13 Population Dynamics 14 Interdependence of Plants and Animals 15 Biodiversity and Ecosystems 16A Effect of Temperature on Respiration 16B Effect of Temperature on Fermentation 17 Aerobic Respiration 18 Acid Rain 19 Dissolved Oxygen in Water 20 Watershed Testing 21 Physical Profile of a Lake 22 Osmosis 23A Effect of Temperature on Cold-Blooded Organisms 23B Effect of Temperature on Cold-Blooded Organisms 24A Lactase Action 24B Lactase Action 25 Primary Productivity 26 Control of Human Respiration 27 Heart Rate and Physical Fitness 28 Monitoring EKG 29 Ventilation and Heart Rate 30 Oxygen Gas and Human Respiration 31A Photosynthesis and Respiration (O2) 31B Photosynthesis and Respiration (CO2) 31C Photosynthesis and Respiration (CO2 and O2)

### Experiment 23A from Biology with Vernier Lab Book

#### Included in the Lab Book

Vernier lab books include word-processing files of the student instructions, essential teacher information, suggested answers, sample data and graphs, and more.