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Questions and Answers
What is the primary purpose of efficient transport mechanisms in living cells?
What is the primary purpose of efficient transport mechanisms in living cells?
- To provide nutrients and essential substances (correct)
- To remove waste and harmful substances
- To facilitate gas exchange
- To regulate cell division
Which body fluid is commonly used by most higher organisms, including humans, for the transport of materials?
Which body fluid is commonly used by most higher organisms, including humans, for the transport of materials?
- Lymph
- Blood (correct)
- Saliva
- Cerebrospinal fluid
How do simple organisms like sponges and coelenterates facilitate the exchange of substances for their cells?
How do simple organisms like sponges and coelenterates facilitate the exchange of substances for their cells?
- Through the circulation of water through their body cavities (correct)
- Through the use of specialized transport proteins
- By utilizing gaseous exchange for substance transfer
- By absorbing nutrients directly from the environment
What is the role of lymph in higher organisms?
What is the role of lymph in higher organisms?
Which of the following is NOT a function of the body fluids mentioned in the text?
Which of the following is NOT a function of the body fluids mentioned in the text?
What is the primary purpose of circulating water through the body cavities in simple organisms like sponges and coelenterates?
What is the primary purpose of circulating water through the body cavities in simple organisms like sponges and coelenterates?
What distinguishes the transport of substances in more complex organisms from that in simple organisms like sponges and coelenterates?
What distinguishes the transport of substances in more complex organisms from that in simple organisms like sponges and coelenterates?
What role does lymph play in the transport of materials in higher organisms, in addition to blood?
What role does lymph play in the transport of materials in higher organisms, in addition to blood?
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Study Notes
Transport Mechanisms in Living Cells
- Efficient transport mechanisms are essential for the exchange of substances, nutrients, and waste products between cells and their environment.
Body Fluids in Higher Organisms
- In higher organisms, including humans, blood is the primary body fluid used for the transport of materials.
Transport in Simple Organisms
- Simple organisms like sponges and coelenterates facilitate the exchange of substances for their cells through direct diffusion between cells and the surrounding environment.
Role of Lymph
- In higher organisms, lymph plays a role in the transport of materials, in addition to blood, and is also responsible for defending the body against infection and disease.
Functions of Body Fluids
- The following are functions of body fluids: transport of materials, regulation of body temperature, and defense against infection and disease.
- Excretion is NOT a function of the body fluids mentioned in the text.
Circulating Water in Simple Organisms
- Circulating water through the body cavities in simple organisms like sponges and coelenterates facilitates the exchange of substances and nutrients between cells and the surrounding environment.
Transport in Simple vs. Complex Organisms
- The primary difference between the transport of substances in more complex organisms and that in simple organisms like sponges and coelenterates is the presence of specialized transport systems, such as blood and lymph, in complex organisms.
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