Chapter 7, Problem 3CTQ

a.

Summary Introduction

To determine:

The comparison and contrast between passive and active forms of transport, also to provide an example of molecule transported by each and the requirements of each process.

Introduction:

The active transport uses the cellular movement of molecules across the cell membrane. It involves processes such as endocytosis and exocytosis. Passive transport is the movement of molecules across the cell membrane without using cellular energy. It involves processes such as osmosis and diffusion.

b.

Summary Introduction

To describe:

The process used by saprobic microbe to transport food particles

Introduction:

A saprobe microorganism is a heterotrophic organism which generally feeds on dead organic materials and obtains energy by the decomposing organic material. They secrete enzymes which digest the organic material and the digested nutrients are absorbed by the cells.

Summary Introduction

To compare:

The transport of digested molecules in a saprobic microorganism and the feeding mechanism of amoeba

Introduction:

Protozoans are animal-like protists that can move around. Their means of movement are through flagella and cilia. These are heterotrophic and derive their nutrition from consuming other organisms.