2007 年
生物 · 共 59 題 · 點擊選項即時核對答案
Questions 21 and 22 refer to the graph below, which shows the changes in pressure of the blood in the aorta, the left atrium and the left ventricle during a heart cycle.
Which of the following combinations shows a correct interpretation of the graph and its supporting reason?
| Interpretation of the graph | Supporting reason | |
|---|---|---|
| the left ventricle is contracting between VW | the left ventricle’s pressure is increasing | |
| the aorta is contracting between XY | the aorta’s pressure is increasing | |
| the left ventricle is relaxing at point V | the left ventricle’s pressure is low | |
| the left atrium starts to relax at point Y | the left atrium’s pressure starts to decrease |
Questions 21 and 22 refer to the graph below, which shows the changes in pressure of the blood in the aorta, the left atrium and the left ventricle during a heart cycle.
Which of the following correctly describes the condition of the valves during the period YZ?
| Bicuspid valve | Semi-lunar valve | |
|---|---|---|
| closed | closed | |
| opened | opened | |
| closed | opened | |
| opened | closed |
Which of the following will lead to high blood pressure in the human body?
Which of the following does not contribute to global warming?
Which of the following diseases can be transmitted by mosquitoes?
The diagram below shows a cross section of the spinal cord. At which part(s) of the spinal cord can synapses be found?
John has some problems in his nervous system. When he is blindfolded and the finger of his left hand is pricked with a needle, he cannot feel the pain and does not withdraw his hand. However, he can move his left arm voluntarily. Which of the following components of the corresponding reflex arc is / are probably damaged?
The photograph below shows part of the human central nervous system.
The movement of the legs is under the coordination of
Questions 29 and 30 refer to the experimental set-up below, which was used to compare the rate of respiration of two different types of insects. Insects of the same mass were placed into the test tubes.
The movement of coloured water in the U-tube is caused by the
Questions 29 and 30 refer to the experimental set-up below, which was used to compare the rate of respiration of two different types of insects. Insects of the same mass were placed into the test tubes.
Which of the following modifications can shorten the time for the experiment?