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Elizabeth Morales

Final Study stack weeks 7-13

QuestionAnswer
The fastest nerve fibers in the body can conduct impulses up to approximately ___ meters per second 130
The brief period during which a local area of an axon's membrane resists re-simulation is called the ___ period. refactory
which nervous system is responsible for "fight or flight"? sympathetic nervous system
which nervous system is responsible for "rest and digest"? parasympathetic nervous system
How do hormones work? hormones are chemical messengers released into the blood to regulate metabolism, growth, reproduction, stress responses and homeostasis through binding specific receptors.
Endocrine vs nervous system Endocrine: slower, longer-lasting effects using hormones in blood nervous: fast, short-term effects using electrical and neurotransmitters
path of the blood though the heart righ atrium -> right ventricle -> lungs -> left atrium -> left ventricle -> body
purpose of the circulatory system transport oxygen, nutrients, hormones and waste; regulate temperature; protect with immune cells and clotting
dunction of the lymphatic system maintain fluid balance, absorbs dietary fats, and provides sites for immune surveillance
steps of gas exchange oxygen diffuses from alveoli -> blood; CO2 diffuses from blood -> alveoli due to concentration gradients
whats the primary function of the respiratory system? Deliver O2 to the tissues for cellular respiration and remove CO2, helping regulate blood PH
role of digestion break down food mechanically and chemically into nutrients that can be absorbed into the blood stream
Where does absorption occur? most aborption happens in the small intestine using villi and microvilli to dramatically increase surface area
 

 



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