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1. Regulation of glucose blood levels is an example of negative feedback mechanism.
Negative feedback mechanism is a control mechanism involved in homeostasis maintain, in this case maintenance of glucose blood levels in normal range.
Negative feedback mechanism contains sensory system that detects the changes, control system that responds to change and activates mechanisms of effector system that reverse the changes in order to restore conditions to their normal levels.
• Pancreatic cells-sensors
• Insulin-control system
• Body cells- effector cells
2. Blood glucose levels change throughout the day because of the food consumption, but in healthy individuals levels of glucose are successfully regulated via the mechanism of hormones such as insulin and glucagon in a process called glucose blood regulation.
This tight regulation of pancreatic hormones is referred to as glucose homeostasis. Insulin lowers blood sugar and glucagon raises it.
3. If the beta cells are destroyed by an autoimmune disease (immune system attacks its own cells), there would be no insulin release, and consequently, the glucose blood levels would be increased.
Diabetes type I is a metabolic disorder caused by the destruction of insulin-producing pancreatic beta cells.
Answer:
1. A.
2.D.
3.B.
Explanation:
Notepad:
A. The present is key to the past. The geological processes ocurring today have always ocurred in the past. So if we want to predict what is going to happen in the future, we need to understand the Earth's past.
B. The tests that are used to determine when continental crust was formed are the relative dating and carbon prototyping
C. Open pit mining, this type of mining is very damaging to the environment because strategic minerals are often only available in small concentrations, which increases the amount of ore needed to be mined.
True....................................................................
Because these volcanic activities happen on plate tectonics.
This is not the best answer but I hope it could help you.
