生物 1999 年 DSE、CE 選擇題（第 4 頁）

31.

Directions : Questions 31 and 32 refer to diagrams I and II below. Diagram I shows a certain posture of a dancer. Diagram II shows some of the muscles associated with her right leg.

Which muscles of the right leg of the dancer are contracting when she maintains the posture shown in diagram I ?

32.

Directions : Questions 31 and 32 refer to diagrams I and II below. Diagram I shows a certain posture of a dancer. Diagram II shows some of the muscles associated with her right leg.

Which of the following can be found in structure X ?

(1)vitamin D

(2)living cells

(3)calcium salts

33.

The diagram below was drawn by a student to show the path of light rays when a short-sighted person was looking at a distant object :

What is wrong with this diagram ?

34.

Which of the following parts of the central nervous system are directly involved in some reflex actions ?

(1)cerebrum

(2)medulla

(3)spinal cord

35.

The metabolic wastes excreted by a mammal include

(1)carbon dioxide.

(2)lactic acid.

(3)undigested food.

36.

Regular exercise may increase the vital capacity of a person. What is the advantage of having a larger vital capacity ?

37.

The salt concentration of the urine of a person was found to decrease shortly after he drank a glass of distilled water. Which of the following is a probable reason for this ?

38.

Compared to the blood in the renal artery, the glomerular filtrate in the Bowman’s capsule has

39.

Which of the following descriptions of the air sacs of the lungs and the coiled tubules of the nephrons is correct ?

40.

Which of the following statements about antibodies is incorrect ?