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02 Jun 2016, 11:54
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
79% (01:51) correct
21%
(02:02)
wrong
based on 233
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Not Attempted Yet
If deep-sea divers ascend too rapidly from ocean depths, the decreasing pressure causes nitrogen to be released as gas bubbles in the blood. This condition is known as “the bends.” Sea snakes, who, like humans, breathe air that contributes nitrogen to the blood, are nevertheless able to make extremely rapid ascents and descents in ocean waters without suffering from the bends.
Which one of the following, if true, contributes most to an explanation of the difference described between Humans and sea snakes?
(A) Sea snakes, unlike humans, can excrete nitrogen from their blood into the sea by means of extremely small blood vessels beneath their skin.
(B) Human deep-sea divers are trained to make several stops on ascending from deep water in order to adjust to decreasing pressure gradually, whereas sea snakes ascend from ocean depths without stopping.
(C) The lung of the sea snake extends from its head to its tail and, when inflated, occupies about 10 percent of the volume of the seasnake’s body.
(D) A rapid release of bubbles of nitrogen gas into the blood inhibits circulation and can deprive organs of the blood they need to function.
(E) The rapidity with which sea snakes are able to descend or ascend in ocean water is partially determined by the degree of buoyancy permitted by the inflation of the sea snake’s lung.
Which one of the following, if true, contributes most to an explanation of the difference described between Humans and sea snakes?
(A) Sea snakes, unlike humans, can excrete nitrogen from their blood into the sea by means of extremely small blood vessels beneath their skin.
(B) Human deep-sea divers are trained to make several stops on ascending from deep water in order to adjust to decreasing pressure gradually, whereas sea snakes ascend from ocean depths without stopping.
(C) The lung of the sea snake extends from its head to its tail and, when inflated, occupies about 10 percent of the volume of the seasnake’s body.
(D) A rapid release of bubbles of nitrogen gas into the blood inhibits circulation and can deprive organs of the blood they need to function.
(E) The rapidity with which sea snakes are able to descend or ascend in ocean water is partially determined by the degree of buoyancy permitted by the inflation of the sea snake’s lung.
02 Jun 2016, 12:29
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The influx of nitrogen here appears to be inferred issue of problem that causes humans to ascend slowly. So the only point that addresses this pre thought answer is option A.
E is a good contender but if read closely it speaks about lung capacity which is not part of the argument.
E is a good contender but if read closely it speaks about lung capacity which is not part of the argument.
02 Jun 2016, 12:58
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Straight (A) No issues with this one...
Check the options -
(A) Sea snakes, unlike humans, can excrete nitrogen from their blood into the sea by means of extremely small blood vessels beneath their skin.
If snakes can excrete Nitrogen from blood vessels to the sea , then gas bubbles are not formed in the blood.
Thus we can say that there is Physiological difference between the Snake and Humans.
(B) Human deep-sea divers are trained to make several stops on ascending from deep water in order to adjust to decreasing pressure gradually, whereas sea snakes ascend from ocean depths without stopping.
Doesn't talk about the difference...
(C) The lung of the sea snake extends from its head to its tail and, when inflated, occupies about 10 percent of the volume of the sea snake’s body.
Just a casual statement , it doen't tell anything more about the difference between Snake and Humans
(D) A rapid release of bubbles of nitrogen gas into the blood inhibits circulation and can deprive organs of the blood they need to function.
Irrelevant to the discussion.
(E) The rapidity with which sea snakes are able to descend or ascend in ocean water is partially determined by the degree of buoyancy permitted by the inflation of the sea snake’s lung.
Irrelevant to the discussion.
Hence Answer will definitely be (A)
| Deep-sea divers : Rapid ascends = decreasing pressure ---> Release of gas bubbles in the blood. ( Bend) Snakes : Rapid ascents and descents do not result in bends Both Snakes and Deep Sea Divers breathe air that contributes nitrogen to the blood |
Check the options -
(A) Sea snakes, unlike humans, can excrete nitrogen from their blood into the sea by means of extremely small blood vessels beneath their skin.
If snakes can excrete Nitrogen from blood vessels to the sea , then gas bubbles are not formed in the blood.
Thus we can say that there is Physiological difference between the Snake and Humans.
(B) Human deep-sea divers are trained to make several stops on ascending from deep water in order to adjust to decreasing pressure gradually, whereas sea snakes ascend from ocean depths without stopping.
Doesn't talk about the difference...
(C) The lung of the sea snake extends from its head to its tail and, when inflated, occupies about 10 percent of the volume of the sea snake’s body.
Just a casual statement , it doen't tell anything more about the difference between Snake and Humans
(D) A rapid release of bubbles of nitrogen gas into the blood inhibits circulation and can deprive organs of the blood they need to function.
Irrelevant to the discussion.
(E) The rapidity with which sea snakes are able to descend or ascend in ocean water is partially determined by the degree of buoyancy permitted by the inflation of the sea snake’s lung.
Irrelevant to the discussion.
Hence Answer will definitely be (A)
