Negative/Positive feedback
The end product in a process stimulates the process.
What is positive feedback?
Comprise 90% of cells in CNS
What are neuroglia cells?
Small, branch arteries
What is Arterioles?
Movement of air into and out of the lungs or breathing
What is pulmonary ventilation?
Portion of pressure due to a particular gas in a mixture of gases
What is partial pressure?
Mechanism to regulate body temperature
What is negative feedback?
Receive information only from proper cells
What are target cells?
Vessels that carry blood toward heart.
What are veins?
Use of oxygen in aerobic metabolism and production of carbon dioxide
What is cellular respiration?
Differences between PCO2 in alveoli & blood (6 mm Hg) and between blood & tissue (6 mm Hg) provide driving force for diffusion of carbon dioxide
What is carbon dioxide diffusion?
Used in operational communication between nervous system & organ systems
What is feedback systems ?
Receptor opens channels for ions
What is binding a neurotrasmitter?
Large vessels that carry blood away from heart.
What is Arteries?
Exchange of gases between the blood and the body’s tissues at the periphery; oxygen to tissues and carbon dioxide away from tissues
What is capillary gas exchange?
(PO2) must be > in alveoli than in blood & > in blood than in tissue
What is partial pressure of oxygen?
The action amplifies the changes that stimulated the effectors
What is positive feedback?
Proteins designed to bind to specific substance (ligand)
What are neurotransmitter hormones?
Delivers blood from heart to body & back to heart.
What is peripheral?
Movement of gases between the air in the lungs and the blood; oxygen into blood and carbon dioxide out of the blood
What is pulmonary diffusion?
Total pressure of gas mixture = sum of partial pressures of each gas. Each gas moves according to its own individual pressure gradient.
What is Dalton’s law?
Diminishes intensity of process to return to initial status quo.
What is Negative feedback loop?
Has its own unique receptor, which allows accuracy in communication
What is each neurotransmitter?
Smallest vessels; site of gas & nutrient exchange
What are Capillaries?
Pulmonary ventilation and pulmonary diffusion
What is pulmonary respiration?
The rate of gas transfer (V gas) is proportional to the tissue surface area, the diffusion coefficient of the gas, and the difference in the partial pressure of the gas on the two sides of the tissue, and inversely proportional to the thickness.
What is Fick’s Law?