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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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JudyThe ADH feedback loop is an example of negative feedback. When blood osmolality is high, it triggers the release of ADH, which acts to reabsorb water in the kidneys, thereby reducing blood osmolality. Once blood osmolality decreases, ADH secretion diminishes, creating a feedback loop that maintains homeostasis.
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Explain negative feedback and its role?
Negative feedback is a corrective mechanism in biological systems where the response to a stimulus results in the inhibition of that stimulus. It helps to maintain homeostasis by counteracting any deviations from the set point. For example, in the regulation of body temperature, negative feedback helps to prevent overheating or hypothermia by signaling the body to either produce more or less heat.
Explain why crystal violet would not be useful in the negative stain technique?
Crystal violet is a basic dye, meaning it has a positive charge and stains negatively charged structures well. In the negative stain technique, the background is stained, leaving the specimen colorless. Using crystal violet would inadvertently stain the specimen, resulting in a false positive.
How would you describe the gram stain?
The Gram stain is a laboratory technique used to differentiate bacteria into two groups based on their cell wall composition: Gram-positive bacteria retain the violet stain, while Gram-negative bacteria appear pink/red after a counterstain with safranin. This staining method is named after the Danish bacteriologist Hans Christian Gram, who developed it in 1884.
Explain how do feedback loops allow the body to maintain homeostasis?
Feedback loops in the body involve sensors that detect changes in internal conditions, a control center that processes this information, and effectors that can bring about a response to counteract the change. This allows the body to regulate factors such as temperature, blood sugar levels, and hormone levels to maintain homeostasis, which is the stable internal environment necessary for proper function of cells and organs.
Can an o positive blood type father parent an ab negative type child?
Yes, it is possible for an O positive blood type father to have a child with an AB negative blood type if the mother is AB negative or carries the AB negative allele. The child would have inherited one blood type allele from each parent, resulting in the AB blood type.
