Question at position 2 Which term best describes the function of blood when considering the presence of leukocytes and antibodies?RegulationTransportationProtection单项选择题
A
Regulation
B
Transportation
C
Protection

Question

Question at position 2 Which term best describes the function of blood when considering the presence of leukocytes and antibodies?RegulationTransportationProtection

BlackTom AI · Accepted Answer

Leukocytes (white blood cells) and antibodies function primarily in immune defense, so the term that best describes their role in blood is "Protection."

1. Relevant knowledge points and concepts
- Blood has three primary functions: transportation (gases, nutrients, wastes), regulation (temperature, pH, fluid balance), and protection (clotting and immune defense).
- Leukocytes are immune cells (neutrophils, lymphocytes, monocytes, eosinophils, basophils) that identify, engulf, and destroy pathogens or coordinate immune responses.
- Antibodies (immunoglobulins) are proteins produced by B lymphocytes that bind specific antigens on pathogens to neutralize them, mark them for phagocytosis (opsonization), or activate complement.

2. Step-by-step reasoning
- Identify the blood components given: leukocytes and antibodies.
- Determine the primary physiological role of those components: both are central to immune mechanisms that recognize and eliminate infectious agents.
- Map that role to the list of functions: immune defense corresponds to the "Protection" function of blood rather than "Transportation" or "Regulation."

3. Calculations
- None required; this is a conceptual classification problem.

4. Why the correct answer is correct
- Leukocytes directly attack or coordinate attack against microbes and abnormal cells; antibodies neutralize toxins/viruses and facilitate their clearance. These activities prevent infection and maintain organismal integrity, which is the protective role of blood.

5. Why the other options are incorrect
- Transportation: Although blood circulates leukocytes and antibodies throughout the body, their primary biological role is not to transport substances but to defend. Transportation refers mainly to red blood cells carrying O2/CO2 and plasma transporting nutrients and wastes.
- Regulation: Regulation refers to maintaining body temperature, pH, and fluid balance; leukocytes and antibodies are not responsible for these regulatory processes.

6. Conclusion
All evidence shows leukocytes and antibodies serve immune defense, so the correct answer is Protection, matching the provided answer.

Question at position 2 Which term best describes the function of blood when considering the presence of leukocytes and antibodies?RegulationTransportationProtection单项选择题

类似问题

Which term best describes the function of blood when considering the presence of leukocytes and antibodies?

Studies have found impaired immune functioning among bereaved individuals.

Feeling liked and encouraged by intimate friends and family has been found to promote

Is the following statement true or false? In the products of methylation-hydrolysis, every -OH group corresponds to the position of a glycosidic bond in the starting polysaccharide.

Which of the follwoing structures represents amylopectin?

Which of the following is true about an aldopentose?I. It is a monosaccharide.II. It contains a CHO groupIII. It is a disaccharide.IV. It is an oligosaccharide.

For stock A, we have 𝛽 𝑖 = 0.70. Suppose the expected market risk premium next year is 9% and the risk-free rate is 3%. What is the expected return of this stock based on the CAPM? (Please answer in % and round to 2 decimal places. If the answer is 8.057%, then in the box, write 8.06)

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单