Multiple Choice
Which of the following best describes tight junctions in animal cells?
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5. Cell Components
Cell Junctions
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which of the following characteristics applies to the cells known as osteoclasts?
A
They are multinucleated cells responsible for bone resorption.
B
They form tight junctions to prevent paracellular transport.
C
They produce collagen fibers for bone matrix formation.
D
They are involved in the synthesis of myelin in the nervous system.
Verified step by step guidance1
Step 1: Begin by identifying the term 'osteoclasts' and its biological function. Osteoclasts are specialized cells involved in the breakdown and resorption of bone tissue.
Step 2: Understand the process of bone resorption. Osteoclasts secrete enzymes and acids that dissolve the mineral matrix and collagen in bone, allowing for the recycling of calcium and phosphate.
Step 3: Analyze the characteristic 'multinucleated cells responsible for bone resorption.' Osteoclasts are indeed multinucleated, as they form by the fusion of precursor cells, and their primary role is bone resorption.
Step 4: Evaluate the other options provided. Tight junctions are typically associated with epithelial cells, not osteoclasts. Collagen production is a function of osteoblasts, not osteoclasts. Myelin synthesis is related to Schwann cells and oligodendrocytes in the nervous system, not osteoclasts.
Step 5: Conclude that the correct characteristic of osteoclasts is 'They are multinucleated cells responsible for bone resorption,' based on their structure and function in the skeletal system.
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