Answer: Sympathetic Nervous System.
Explanation:
The sympathetic nervous system is part of the autonomic nervous system. The sympathetic nervous system activates what is often termed the fight or flight response. The sympathetic nervous system directs the body's rapid involuntary response to dangerous or stressful situations. A flash flood of hormones boosts the body's alertness and heart rate, sending extra blood to the muscles. Breathing quickens, delivering fresh oxygen to the brain, and an infusion of glucose is shot into the bloodstream for a quick energy boost. The sympathetic nervous system allows animals to make quick internal adjustments and react without having to think about it.
Genetic Diversity in Plants. Genetic diversity is of fundamental importance in the continuity of a species as it provides the necessary adaptation to the prevailing biotic and abiotic environmental conditions, and enables change in the genetic composition to cope with changes in the environment
Do you have a link or something to the answer choices?
Kinetochore microtubules connect at the centromere and pull the chromatids apart, whilst nonkinetochore microtubules help elongate the cell.
The correct answer is "<span>the presence of the appropriate receptors on the cells of the target tissue or organ".
Hormones are chemical messengers that work to modify the target cell's actions. Hormones work by attaching to its appropriate receptor, then the receptor will be activated and signal transduction will take place. Signal transduction mechanisms will eventually activate a protein kinase which will phosphorylate a certain protein (usually a promoter for transcription) which will then start the production of a certain protein with a specific function.
For instance, insulin is a hormone. Insulin will then bind to muscle and adipose cells which will activate signal transduction mechanisms that will eventually lead to the translation of the glucose receptor and channel proteins which will increase the uptake of glucose in the blood stream and lower the blood glucose levels.</span>
