Respiration in Organisms

Respiration in organisms Worksheet-1

Multiple-Choice Questions:

1. Air can enter the body and travel to the lungs:

(a) through the oesophagus and gullet

(b) through the mouth and the nose

(c) through the nose and the nervous system

(d) through the windpipe and the pores

2. Before reaching the lungs, the windpipe or trachea:

(a) Vibrates and creates sounds.

(b) Closes up so that no oxygen can escape.

Respiration in organisms Worksheet-2

Multiple-Choice Questions:

16. Which of the following animals have tracheae?

(a) Earthworms                                (b) Grasshoppers         

(c) Hydras                                         (d) Corals

17. The respiratory control center of humans is located in the:

(a) Alveoli

Respiration in organisms Worksheet-3

Multiple-Choice Questions:

1. The efficiency of gills in fish is derived from:

(a) the increasing temperature of blood within the gills

(b) continuous diffusion of oxygen into the blood

(c) the countercurrent flow of water over the gills

(d) Both the countercurrent flow of water over the gills and the continuous diffusion of oxygen into the blood