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Questions and Answers
Which of the following is a reason why unicellular organisms do not need a cardiovascular system?
Which of the following is a reason why unicellular organisms do not need a cardiovascular system?
- They do not require nutrients or produce waste
- They have a different method of nutrient delivery
- Diffusion time for oxygen and glucose is very short
- They rely on diffusion through their cell membrane (correct)
In small multicellular organisms like C. elegans, the diffusion time for oxygen is approximately how long?
In small multicellular organisms like C. elegans, the diffusion time for oxygen is approximately how long?
- 90 seconds
- 3.6 seconds
- 1.2 seconds
- 30 seconds (correct)
For larger organisms like humans, why is a cardiovascular system essential?
For larger organisms like humans, why is a cardiovascular system essential?
- They require a more efficient method of nutrient delivery and waste removal (correct)
- Diffusion time for oxygen and glucose is very short
- Their cells are more resistant to diffusion
- They have a higher metabolic rate
Which of the following is NOT an essential part of the cardiovascular system?
Which of the following is NOT an essential part of the cardiovascular system?
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What is the definition of the cardiovascular system?
What is the definition of the cardiovascular system?
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