Diffusion of gasses Study guides, Class notes & Summaries

Examples of respiratory structures of terrestrial animals -:- bulk flow with tracheal system and spiracles (insects), cutaneous (frog) Examples of respiratory structures of aquatic animals -:- bulk flow (sponges, cnidarians), gills, water vascular system, arborescent respiratory trees (sea cucumber), cutaneous (leech) Do all aquatic animals necessarily exchange gasses in water? -:- No, some aquatic animals could exchange gasses above water using lungs, like aquatic mammals, or cuta...

DRGs (diagnosis-related groups) - refers to reimbursement for health care services based on a predetermined fixed price-per-case or diagnosis; it categorizes patients to better control hospital costs; there is a time-table for how long someone with a DRG can be in the hospital on government funds, which is a barrier to proper healthcare. gastric secretion pH (checking NG tube) - less than 5.5 Hyponatremia - Stupor/coma Apprehension, headache confusion, depression convulsion, n/v Lethargy ...

Biology 117 final exam review Complete Questions Guide With Correct Answers True or False? Simple, non-photosynthesizing prokaryotes are hypothesized to be the first living life-forms on Earth. - ANS True True or False? Acclimations are short-term, genotypic characteristics of an organism. - ANS False True or False? The size of a cell is limited based on the need of adequate surface area for the cell's volume. - ANS True True or False? All members of kingdom fungi form a lar...

what makes alveoli the ideal blood-gas interface - ANSWER--surface area, lots of alveoli -think, 1 cell thick -makes good for diffusion -they also have surfactant How do respiratory gasses (O2, CO2) move in the body? Why is this system so effective? - ANSWER--in the blood, gets there by pressure gradients, doesn't require energy what does the oxygen dissociation curve describe - ANSWER-percent oxygen saturation in arteries (carrying oxygen to tissues) what is the a-v oxygen difference...

Define gas exchange The process by which oxygen is transported to cells and carbon dioxide is transported by cells Hypoxemia reduced oxygenation of arterial blood Hypoxia state at which O2 reaching cells is insufficient Anoxia total lack of oxygen in tissues Ischemia Insufficient O2 blood to tissues Physiologic process of gas exchange Atmosphere (21% O2) →chemoreceptors in medulla sense CO2 levels → transmit to diaphragm and intercostals to contract to breathe deep → nose (warms & hum...

What is the difference between blood and hemolymph? - Blood: In a Closed circulatory system and is confined to vessels. Hemolymph (AKA interstitial fluid): In an Open circulatory system and bathes the body cells. What are the major types of blood cells? - red and white cells What adaptations allow an animal to use diffusion across its skin as the only mechanism for gas exchange? - The animal must be thin and have a large surface area. Animals that only diffuse across the skin have a dense ...

When should one consider COPD? - chronic cough dyspnea sputum production Hx risk factors: smoking, alpha-1antitrypsin def., and workplace exposure to gasses and fumes How is COPD dx'd? - spirometry after appropriate tx w/bronchodilator (salbutamol) How does one dx COPD by spirometry and assess the severity of COPD? - Postbronchodilator FEV1/FVC for dx Postbronchodilator FEV1 for severity What values of FEV1/FVC and FEV1 dx COPD? - FEV1 < 80% of predicted FEV1/FVC < .70 The...

Praxis 2: 5005 Multiple Subjects: Practice Test 2 Science Questions and Answers 100% Pass What is the term for the thick layer surrounding Earth's outer core? Mantle Which of the following two gasses compose the vast majority of the Earth's atmosphere? Nitrogen and Oxygen Which of the below is an example of metamorphic rock? Schist Mountains are most likely to form along which type of plate boundary? Convergent Approximately how long ago did the first anatomically modern humans appear on t...

What is the driving force that causes gasses (oxygen and carbon dioxide) to cross membranes associated with the pulmonary and system circuits. a) active transport b) diffusion c) hydrostatic pressureb) diffusion The oxygen concentration in the venous blood of the systemic circuit is close to 0. T/Ffalse Which of the following is most affected by aspirating a liquid? a) the perfusion (amount of blood flowing to) of the alveoli b) the amount of oxygen reaching the alveoli c) the amount ...

Without neurological involvement? what is a resting heart rate correct answers 60-100 bpm without the influence of the ________ nervous system resting heart rate would be 100 bpm correct answers parasympathetic what is considered a normal resting heart rate correct answers 60-80/100 bpm How does on predict maximal heart rate correct answers 220 - (age) 4 respiratory steps to continuously carry oxygen to and remove CO2 from all body tissues: correct answers 1. pulmonary ventilation (e...