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Two immune system questions:
Activated T-helper cells aid in humoral immune responses by releasing cytokines which promote antibody production, phagocytosis, neutralization and apoptosis. Which parts of this statement are false and why? I know cytokines activate B cells and cytotoxic T cells, and the interferons are cytokines as well.
Membrane receptors associated with cd4, cd8, cytotoxic t cells and helper t cells do not recognize antigenic determinants of pathogens in the ECF space. Why is this true? Are these cells not present in the ECF?
Explain the difference between saturated and unsaturated fats. Give examples of each. Explain the difference between HDL and LDL cholesterol. What are triglycerides. What are healthy levels of total blood cholesterol and blood triglycerides
What were the components of the pectoral girdle in early fishes and how has it changed in tetrapods? Specifically, what is the typical fate of the coracoids and clavicle in the tetrapod girdle?
How does the length of the recognition site determine the length of the DNA fragments produced by the restriction enzyme (frequency of cutting)? dentify 3 important features of cloning vectors?
How does changing the pH or temperature of a reaction affect the active site of an enzyme?
Identify Components Of Trachea and Cross-Section Of Bone
The ph of mitochondria matrix is 8.2 while the ph of intermembrane is 7.2. Determine the voltage potential across the mitochondrial membrane which would prevent hydrogen ions from flowing into matrix?
Clarify how the procedure of meiosis assures that the chromosome number of a species remains the same from generation to generation.
In general compare and contrast the three functional classifications of joints according to movement. What are two characteristics that make synovial joints unique and different from other joints?
Isolated two different mutants
The four phases of the disposition of a toxic compound to assess its toxicity are absorption by membranes in a system, the distribution throughout the system.
Parasites such as pinworms are often found in high densities in select human populations. What are the abiotic factors that you may consider if trying to control this parasite in a day care. If you are asked to design an epidemiological study of this..
Recognize factors that may affect the identification of an infectious agent form a patient. Also compare the types of tests performed on microbial isolates versus those performed on patients themselves in the process of microbial identification.
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