Paul, physically inactive and obese, suddenly dropped to the ground. His friends called 911, and the emergency medical technicians arrived. An emergency medical technician (EMT) quickly began to perform an EKG on Paul and saw many rapid, irregular waves
where individual QRS waves should have been. Based on the information in the text, what is your diagnosis, and what is your suggested treatment? What do you think a physician will recommend to Paul should he survive?
What will be an ideal response?
Paul seems to have ventricular fibrillation, and the EMT would probably administer electrical shocks to try to get the SA node to regulate the contractions. His physician will probably prescribe a routine of physical exercise (and most likely a diet, but that is information covered in a different chapter), depending on Paul's specific status.
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As adults, insulin signaling through its receptor kinase enables virtually every cell in our body to transport glucose across the plasma membrane into the cytosol. Use the following five terms to complete the sentences below
Terms (A-E) may be used once, more than once or not at all. A. receptor binding B. receptor activation C. signal transduction and amplification D. response E. termination Autophosphorlyation of transmembrane proteins caused by insulin association with those proteins is an example of __________________. _________________ occurs when the proteins that are phosphorylated after insulin associates with the cell-surface protein become dephosphorylated. The noncovalent association of insulin with specific proteins on the surface of a cell is an example of ___________. Activated proteins in the nucleus causing transcription (and eventually translation in the cytosol) of proteins needed for cell division is an example of _________. _______________ occurs when the insulin receptors phosphorylate each other causing other proteins in the cytoplasm to bind to them, including a protein called insulin-receptor substrate 1 (or IRS-1). _______________ occurs when the phosphorylated cytosolic protein IRS-1 binds to other cytosolic proteins to activate them, which in turn bind to others to activate them. One consequence of IRS-1 stimulation is the exchange of GDP for GTP in Ras, which is an example of _______________. ___________________ occurs when the GTP bound to Ras is hydrolyzed to GDP. One consequence of IRS-1 stimulation is the uptake of glucose by the cell, which is an example of ________________. What will be an ideal response?
The condition in which shoot apical meristems suppress the growth of axillary buds is called ____________
A. repression B. apical dominance C. shoot-root ratio D. optimum growth pattern E. primary growth
A ____ feedback control system functions when a change in the internal environment triggers the body to oppose the
change and restore the normal environmental conditions.
a. positive b. physiological c. reflex d. negative e. anatomical
In which phase of meiosis I do homologues separate?
A) prophase II B) anaphase C) metaphase I D) anaphase I