A regulation grid for NS230 Unit 8: insulin, glucagon, epinephrine and cortisol set against eight pathways, each cell naming the target enzyme and whether control is covalent or transcriptional. Searches like "ns 230 unit 8 assignment example", "ns230 unit 8 sample" and "ns230 unit 8 example" land here.
What a finished NS230 Unit 8 hormonal regulation summary looks like
The summary centers on one grid. Rows list glycogen synthesis, glycogen breakdown, glycolysis, gluconeogenesis, fatty acid synthesis, lipolysis, fatty acid oxidation and muscle proteolysis; columns list insulin, glucagon, epinephrine and cortisol. Each cell carries an arrow, the enzyme acted on and the mechanism in a few words. Glucagon's liver column reads as one cascade: cAMP, protein kinase A, phosphorylated glycogen synthase switched off, phosphorylase switched on, the bifunctional enzyme lowering fructose-2,6-bisphosphate so glycolysis slows and gluconeogenesis speeds. Insulin's column reverses most of it through protein phosphatase 1 and a phosphodiesterase that clears cAMP, and adds lipoprotein lipase in adipose. Epinephrine's column adds muscle, which glucagon cannot reach. Cortisol's cells are marked hours, not minutes, since it works by raising enzyme amounts such as phosphoenolpyruvate carboxykinase.
How a NS230 Unit 8 example is structured
An opening paragraph names the four signals, the receptor type each uses and the second messenger or kinase that follows, giving every later cell a mechanism to point back to. The grid comes next, typically as a full-page table with a legend explaining the arrows and a mark for timescale. Three short sections then read the grid by column rather than by row: the fed signal, the fasting signals, and the stress signals, so that insulin is shown working against glucagon enzyme by enzyme. A tissue note follows, since the same hormone does different things where receptors differ: glucagon acts mainly on the liver and has no receptors on skeletal muscle, while epinephrine reaches liver, muscle and adipose. The closing paragraph states the general rule and its main exception, muscle pyruvate kinase, which lacks the phosphorylation site of the liver form.
Receptor to kinase, once per hormone
Each signal's route from receptor to acting enzyme is stated a single time at the top, so the grid can cite it instead of repeating it in every cell.
One enzyme, two opposing hands
Glycogen synthase, phosphorylase and the bifunctional enzyme each appear with insulin and glucagon acting on the same site from opposite directions.
Covalent speed, transcriptional delay
Covalent control is marked as fast and reversible; cortisol's changes in enzyme amount are marked as slow, which keeps the four columns honest about time.
Receptors decide the tissue
Muscle answers to epinephrine and insulin but not glucagon, and the summary says so in the tissue note rather than leaving a blank column unexplained.
The rule, then muscle pyruvate kinase
The closing statement gives the phosphorylation rule and then names muscle pyruvate kinase as the enzyme it does not cover.
Where marks go in NS230 Unit 8
Summaries lose most when the grid holds arrows and nothing else, up or down with no enzyme named, since the unit asks which switch each signal throws. The second deduction goes to hormones credited with effects in tissues that lack their receptors, glucagon acting on skeletal muscle being the usual one. Mechanism errors follow: insulin said to phosphorylate glycogen synthase into its active form, or protein kinase A said to activate fatty acid synthesis. Timescale is often missing, so cortisol appears to act in seconds alongside epinephrine. Some papers treat the fed and fasted signals as separate lists and never show insulin and glucagon pulling on the same enzyme, which removes the reciprocal control the grid exists to display. Liver and muscle merged into one column cost accuracy marks. Mechanisms left uncited are queried by most graders.
Get a NS230 Unit 8 example written to your instructions
Send the Unit 8 prompt with whichever hormones and pathways it names, and the rubric. The grid is built to that scope with target enzymes, mechanisms and timescales in every cell, plus the column-by-column reading, in 24-48h. First samples carry no fee, and the legend follows any notation your course prefers.
NS230 Unit 8 questions, answered
Should the grid include AMP-activated protein kinase?
If your text has introduced it, yes, as a fifth column or a footnote. It responds to cellular energy charge rather than to a hormone, and it phosphorylates acetyl-CoA carboxylase to slow fatty acid synthesis. Including it shows the grader that not every switch in the grid is hormonal. If your prompt restricts the summary to hormones, one sentence acknowledging it is enough.
How do I show that a hormone changes enzyme amount?
Mark those cells differently from the covalent ones, with a symbol explained in the legend, and name the gene product affected, such as phosphoenolpyruvate carboxykinase or glucose-6-phosphatase. Add the timescale, hours rather than minutes. Graders look for this distinction because it explains why fasting adaptations build over a day while a sprint's response is immediate.
Do I have to cover thyroid hormone and growth hormone?
Usually not in the grid itself. Most prompts at this level focus on insulin, glucagon, epinephrine and cortisol, which act directly on the pathways the course has traced. If your prompt names others, add them with the same care: receptor, target, direction and timescale. A brief note on thyroid hormone's effect on overall metabolic rate is a reasonable extra where space allows.