Dhooy7

I will attach the graphs. Here is what I understand. Let me know if something is wrong SA node/Pacemaker Potential (and AV node?) The permeability of potassium decreases based on the graph and potassium is kept within the cell and less goes out of the cell. Then the fast gated calcium channels open for a rapid depolarization of the muscle cell. Then the calcium permeability increases so there is a lot of calcium rushing into the cell. The calcium permeability then decreases so less calcium is exciting the cell. Then during the repolarization the potassium channels open to help repolarize the cell. The permeability of potassium increases so potassium enters the cell. Is this one cycle? There is another hump and a slow depolarization and an action potential labeled on the graph and reaching threshold. Can it reach threshold after the first hump in the graph or does it need two of them? Are the large humps or peaks in the graph both an action potential? Ventricular and Atrial Atrial and ventricular rely on sodium (Na+), not potassium like pacemakers do. The sodium channels open and cause the depolarization of the cell. Then repolarization ooccurs because the NA+ gates close and Ca+ gates open. They have a slower refractory period due to the slow Ca+ gates (Ca+ enters slower). The depolarization of pacemakers is slower compared to atrial and ventricular cells. The refractory period is slower for ventricular and atrial cells. I few questions as my exam is tomorrow. Ok. A couple of questions when I am reading from that diagram. Are both of the humps the same process of an SA node or pacemaker? Like just one is a pacemaker action potential? Also, when the Ca permeability decreases does that mean the calcium channels close? And do the potassium channels open and then the permeability increases so potassium rushes in from the cell from outside of the cell?

6. Which of the following is a target cell response that might result from a hormone sitmulation? a) synthesis of proteins or other regulataory molecules in the target cell b) change in cell membrane permeability c) modify the gene response of a cell d)stimulate cell secretion action e) enzyme activation or deactivation 6. Which homrone is reponsible for the following: stimulates protein synthesis- growth hormone stimulates liver glycogenloysis- ephinephrine stimulates lipogenesis and storage of excess fuel stimulates gluconeogenesis- cortisol released from a sympathetic nerve ganglia when the body is stressed can be stored in its gland for future release 15. Several of the hormones released during a stress response act to 'decrease peripheral glucose utilization.' What does this mean? What is the effect of decreasing peripheral glucose utilization? 10. Mark each statement that is correct. a) Hormone action at the cell can varybased on the presence or absence of other hormones. b) Hormones effects occur as soon as the hormone binds ito its receptor c) The duration of hormone action is variable d) Down-regulation can involved a reduction in the number of hormone receptors on a target cell 12. Endocrine disease or disorders can produce a range of symptoms that result from long term increases or decreases in hormone action on target cells. Which of the following situations might alter hormone action on its target cell (and produce disease)? a) target cell receptor is missing or defective b) hormone inactivation or exertion is decreased c) metabolic pathway that synthesizes the hormone is defective d) target cell response to the hormone is enhanced 14. Several hormones are released during a stress response in order to help the body repond to the stressor. Which of the following hornomes would be released during a stress event? a) norephinerephrine b) testosterone c) insulin d)cortisol e) somatotrophin f) thyroxine g) GHRN h) ACTH

Organic Chemistry Edit ★ Anyone really good at organic chemistry especially dying?Edit I need to come up with structures from the data given. I really don't know where to start and would really appreciate assistance. So I need to (1) draw the product(s) for each set of reactants listed below (2) note and explain any structural and color differences between the dyes Here's the information: Student Diazo Component Coupling Agent 1 Sulfanilic acid Resorcinol 2 p-Nitroaniline Resorcinol 3 Sulfanilic acid Phenol 4 p-Nitroaniline Phenol 5 Sulfanilic acid N,N-Dimethylaniline 6 m-Nitroaniline Phenol 7 m-Nitroaniline N,N- Dimethylaniline 8 Sulfanilic acid N-Methylaniline 9 m-Nitroaniline N-Methylaniline ( Continuation from top) Color of Dye Wavelength λmax (nm) Student 1 orange 400 2 cherry chocolate brown 425 3 rust 360 4 cherry brownies not available 5 rich dirt brown not available 6 dark maroon 700 7 red velvet cake dark brown 420 8 pale yellow 335 9 rusty dark orange 745 What is the importance of the diazo component, coupling agent, color of dye and wavelength?