1 |
Walls of the chest cavity are composed of |
Ribs
Intercostal muscle
Ribs and intercostal muscle
Ribs, intercostal muscle and diaphragm
|
2 |
The heart of the fist is single circuit and the blood flows in |
Two direction
One direction
One and two direction
Reverse direction
|
3 |
The main tracheal trunk in cockroach communicates with exterior by |
100 pairs
10 pairs
8 pairs
4 pairs
|
4 |
In the peroxisomes the glycolate is converted into |
Serine
Ethanolamine
Glycine
CO<sub>2</sub>
|
5 |
Xylem and phloem are not involved |
In transport of minerals
In transport of liquids
In transport of gases
In transport of water
|
6 |
Water is dense than air |
800 times
1800 times
8000 times
80,000 times
|
7 |
How much air can lungs when they are fully inflated |
5 liters
4 liters
3.5 liters
4.5 liters
|
8 |
Blood contains ______ oxygen per 100 ml of blood when haemoglobin is 98% saturated |
19.6 ml
18.6 ml
16.6 ml
17.6 ml
|
9 |
Respiratory pigment present in muscles is called ______ |
Myoglobin
Globin
Haemoglobin
Haemocyanin
|
10 |
The respiratory system is most efficient in ______ |
Man
Bird
Fish
Snake
|
11 |
Air spaces between mesophyll cells of a leaf comprise ______ of the total volume |
20%
30%
40%
50%
|