Exam (elaborations)

ZOL2601 ASSIGNMENT 4 SEMESTER 1 2025 (209620) - DUE 13 May 2025

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Comparative Animal Physiology

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University Of South Africa

Comparative Animal Physiology - ZOL2601 Assignment 4 Semester 1 2025 (209620) - DUE 13 May 2025 ;100 % TRUSTED workings, Expert Solved, Explanations and Solutions.

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zol2601 assignment 4 semester 1 2025

Institution
University of South Africa
Course
Comparative Animal Physiology

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ZOL2601
ASSIGNMENT 4 SEMESTER 1 2025

UNIQUE NO. 209620
DUE DATE: 13 May 2025

, ZOL2601 – Assignment 4 Answers

Scope: Learning Units 3, 4, and 5
Total Marks: 50

Question 1 [10 marks]

How can we use CO₂ production to estimate an animal’s metabolic rate? Explain
two methods.

Metabolic rate refers to how much energy an animal uses to stay alive and perform daily
functions like moving, breathing, and digesting food. One way scientists measure this is
by looking at how much carbon dioxide (CO₂) the animal produces. This is because
when animals break down food for energy, they release CO₂ as a waste product. So,
more CO₂ means more energy is being used.

There are two main ways to do this:

1. Closed Respirometry System
In this method, an animal is placed inside a sealed container with a known
amount of air. As the animal breathes, it releases CO₂. Scientists measure the
change in CO₂ levels over time. By knowing how fast CO₂ builds up, they can
calculate how fast the animal is using energy. This method works well for small
animals and gives accurate results.
2. Open-flow Respirometry System
This system allows air to flow continuously through a chamber where the animal
is kept. The air that enters and the air that exits are compared to see how much
CO₂ the animal adds. This method is good for animals that need fresh air all the
time and helps measure real-time changes in metabolism.

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Exam (elaborations)

ZOL2601 ASSIGNMENT 4 SEMESTER 1 2025 (209620) - DUE 13 May 2025

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