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The ADH feedback loop is an example of a negative feedback loop. Negative feedback loops occur when the output of a system acts to oppose the changes to the input of the system. This is the case with ADH because when there is not enough water, the hypothalamus and pituitary gland work to release ADH so that the body can retain more water.

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Q: Is the ADH feedback loop an example of positive or negative feedback explain?
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Explain negative feedback and its role?

_ It's the major physiological response to stimuli._ Always opposes the stimulusFor ex: Body temp. at 37oCor Blood sugar at 100 mg/dLor Heart rate at 70BPM

Explain why crystal violet would not be useful in the negative stain technique?

Negative staining techniques are designed to stain everything BUT the bacterial cells. This allows us to see the cells unstained and helps us observe their morphology (how the cells are shaped and how they group together). The cells have an overall negative charge on their surface, so they naturally attract positive charges. Crystal Violet carries a positive charge, so it would adhere to the surfaces of the cells thus staining the cells (which is not what you want in a negative stain!)

Explain how do feedback loops allow the body to maintain homeostasis?

They work a bit like a thermostat that keeps a constant temperature in a house. Negative feedback loops work through receptors, which sense a change such as in blood pressure. Signals are then sent to the control centres, usually in the brain, which then give instructions to the effectors - mechanisms which then regulate conditions such as blood pressure and bring it back to normal

How would you describe the gram stain?

Describe the Gram stain technique and the effect on Gram-positive and Gram-negative bacteria after each step. Be very specific about what is happening at each step and why it happens. (hint: be sure to fully explain your answer and not just list the steps)

Explain how your body temperature is an example of homeostasis?

just cuz

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Explain would the formation of a goiter be positive or negative feedback?


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Positive plus positive equals positive. Negative plus negative equals negative. Positive greater than negative equals positive. Negative greater than positive equals negative.

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V kno that- x- is +. Now when u sqare a negative no it means occouring 2 times and cancel out each other. For example- -2 x -2=4 ============================ (a second answer.) Every real number is either negative, positive or zero. When you square a number, you multiply it by itself, so if you square a negative number, you are multiplying a negative by a negative which gives a positive. If you square a positive, you multiply a positive by a positive and get a positive. If you square 0 , get 0. Therefore, in no case is the answer negative. ( It is harder to explain why a negative times a negative is positive.)

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Negative, because 5 is an odd number

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That simply means that there is both a positive and a negative number which, when squared, gives you 64.