MCQ

CH9 - GAS EXCHANGE AND SMOKING

In the lungs, movement of dissolved carbon dioxide out of the capillaries occurs in one of two ways:• by diffusion through the endothelial cells of ...

2024 Summer

3

MCQ

CH9 - GAS EXCHANGE AND SMOKING

How are alveoli adapted to their function?

2024 Summer

4

MCQ

CH9 - GAS EXCHANGE AND SMOKING

What maintains the steep concentration gradients needed for successful gas exchange in the lungs?1. Air flow in the alveoli is in the opposite directi...

2024 Summer

3

MCQ

CH9 - GAS EXCHANGE AND SMOKING

The diagram shows oxygen diffusing from the space inside an alveolus into the blood through the gaseous exchange surface.What would increase the rate ...

2024 Summer

6

MCQ

CH9 - GAS EXCHANGE AND SMOKING

Where is cartilage tissue always found in the human gas exchange system?

2024 Summer

4

MCQ

CH9 - GAS EXCHANGE AND SMOKING

Which tissues are present in a bronchus? [Table_1]

2024 Summer

5

MCQ

CH9 - GAS EXCHANGE AND SMOKING

Scientists compared the density of goblet cells in the lungs and the density of mucus in the lungs of three groups of people: • people who do not s...

2024 Summer

3

MCQ

CH9 - GAS EXCHANGE AND SMOKING

Steep concentration gradients must be maintained for efficient gaseous exchange to occur in the human lungs. Which row correctly describes how steep ...

2024 Summer

7

MCQ

CH9 - GAS EXCHANGE AND SMOKING

What is the function of cilia in the gas exchange system?

2024 Winter

4

MCQ

CH9 - GAS EXCHANGE AND SMOKING

Which tissues are present in the walls of a trachea and an alveolus? [Table_1: tissue table with epithelium with goblet cells and smooth muscle prese...

2024 Winter

4

Theory

CH1 - CELL STRUCTURE

(a) (i) Name the cells labelled A and the structure labelled B.A ........................................................................................

2013 Summer

2

Theory

CH10 - INFECTIOUS DISEASE

(a) Explain how the virus that causes measles is transmitted.............................................................................................

2013 Summer

2

Theory

CH7 - TRANSPORT IN PLANTS

(a) Transpiration is often described as an 'inevitable consequence of gas exchange in plants'.Explain what is meant by this statement....................

2013 Summer

1

Theory

CH6 - NUCLEIC ACIDS AND PROTEIN SYNTHESIS

Fig. 4.1 shows the two base pairs in a DNA molecule.(a) Name the bases labelled J and K and the bond labelled L.J .......................................

2013 Summer

1

Theory

CH4 - CELL MEMBRANES AND TRANSPORT

Fig. 5.1 shows a section of a cell surface membrane.(a) State the functions of structures P, Q and R.P ..................................................

2013 Summer

2

Theory

CH5 - THE MITOTIC CELL CYCLE

(a) Explain how uncontrolled cell division can result in cancer. ........................................................................................

2013 Summer

2

Theory

CH5 - THE MITOTIC CELL CYCLE

(a) The cells in Fig. 1.1 are from the same organism and look the same. The cells in Fig. 1.1(a) have been produced by mitosis and the cells in Fig. 1...

2013 Summer

2

Theory

CH7 - TRANSPORT IN PLANTS

Fig. 2.1 shows xylem tissue in a longitudinal section through the stem of a dicotyledonous plant. [Image_1: Fig. 2.1] (a) Describe and explain how the...

2013 Summer

2

Theory

CH10 - INFECTIOUS DISEASE

(a) Explain why tuberculosis (TB) is known as an infectious disease......................................................................................

2013 Summer

3

Theory

CH2 - BIOLOGICAL MOLECULES

Polysaccharides are synthesised by condensation reactions between monosaccharide or disaccharide subunits (monomers).(a) Name the type of bond formed ...

2013 Summer

3