How do lymph nodes aid in a cancer diagnosis?
What will be an ideal response?
The lymphatic system filters extracellular fluids. Therefore, if cancerous cells have metastasized
(spread from the initial location), it is likely that some cancerous cells may be located in the lymph
nodes. The examination of numerous lymph nodes surrounding the primary site of the cancer may
enable the physician to determine if localized treatment will be effective or if a broader spectrum
approach is necessary.
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Why should you not eliminate all carbohydrates from your diet?
1.Carbohydrates taste too good to give up. 2.Fiber is a carbohydrate and you need fiber for proper digestive function. 3.Your body can only use carbohydrates to make ATP. 4.No other food resources can be converted into a useful form for metabolism.
Which term refers to a nutrient that is required by a microorganism in large quantities for use in cell structure and metabolism?
A. element B. growth factor C. trace element D. macronutrient
Match each of the following cellular processes to the stage of meiosis in which it occurs. (Select all correct processes for each meiotic stage. Each cellular process may be used more than once.)
Stage Cellular processes prophase I a. Microtubules search for and attach to kinetochores at the centromere of each chromosome. metaphase I b. Microtubules from both sides of the spindle tether each chromosome and move them to the center of the cell. anaphase I c. Microtubules from both sides of the spindle tether each bivalent and move them to the center of the cell. telophase I d. Chromosomes condense to thickened structures that are visible under the microscope. prophase II e. The centromere divides and the sister chromatids separate. metaphase II f. The nuclear envelope reforms around the segregated chromosomes. anaphase II g. Two new chromosomes form from each original chromosome. telophase II h. The nuclear envelope disappears. i. Microtubules pull chromosomes toward opposite poles. j. The spindle assembles from tubulin dimers as the centrosomes migrate to opposite poles k. Chromosomes arrive at opposite poles of the cell. l. Chromosomes decondense. m. The spindle disappears. n. The bivalents separate and the homologous chromosomes move apart. What will be an ideal response?
What do synaptic signaling and paracrine signaling have in common?
A. Cells release a signal that affects cells at long distances. B. Cells release a signal through gap junctions to affect neighboring cells. C. Cells release a signal that affects it and neighboring cells. D. Cells release a signal that affects neighboring cells. E. Cells bind a membrane bound signal on a neighboring cell.