FORM2 TRANSPORT - KCPE-KCSE

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1.Which processes can take place in a root hair cell when oxygen is not available?

A. active transport only

B. diffusion only

C. active transport and osmosis only

D. diffusion and osmosis only

2.Which processes can take place in a root hair cell when oxygen is not available?

A active transport only

B diffusion only

C active transport and osmosis only

D diffusion and osmosis only

1.What is transported by the blood?

Carbon dioxide

II Antibodies

III Urea

A. I only

B. I and II only

C. II and III only

D. I, II and III

4.What is the role of active transport in the transmission of nerve impulses by neurones?

A. Propagates an action potential by pumping sodium ions across the membrane out of the neurone.

B. Propagates an action potential by pumping sodium ions across the membrane into the neurone.

C. Initiates the action potential needed for the transmission of an impulse by pumping calcium ions out of the endoplasmic reticulum.

D. Establishes the resting potential needed for the transmission of an impulse by pumping sodium and potassium ions across the membrane.

5.Which is the correct sequence of blood flow in normal human circulation?

A. pulmonary vein ® right atrium ® aorta ® vena cava

B. vena cava ® pulmonary vein ® aorta ® right atrium

C. vena cava ® right atrium ® pulmonary vein ® aorta

D. pulmonary vein ® vena cava ® aorta ® right atrium

6.The graph shows the pressure changes in the left atrium and the left ventricle while the heart is beating.At which point do the atrio-ventricular (bicuspid and tricuspid) valves close?

7.The table shows substances that pass between capillaries and tissues in a part of the body.

In which part of the body are these capillaries?

A between the alveoli

B in the kidney

C in the liver

D in the villi

8.Look at the diagram of a heart.Which vessel is a vein carrying oxygenated blood?

9.The graph shows pressure changes in the left side of the heart, during a single heart beat.At which point do the semi-lunar valves open?

NNN

10.The diagram shows the investigation of blood flow in the veins of the lower arm

A cloth is tightly wrapped round the arm at point Z and the veins stand out clearly. One finger presses on the vein at W.When another finger strokes the vein, as shown in the diagram, the vein lies flat between points W and Y. Some possible explanations are listed.

Which explanations of the vein lying flat are correct?

A 1 and 2

B 1 and 4

C 2 and 3

D 2 and 4

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