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What is biological oxygen demand?
It determines the amount of dissolved oxygen that is consumed by aerobic biological microorganisms in water. It is measured by the amount of oxygen that is consumed per liter of sample during 5 days of incubation it is in milligrams.
What is TOD BOD in water quality measurement?
There are three OD's used Total Oxygen Demand (TOD), Chemical Oxygen Demand (COD) and Biological Oxygen Demand (BOD) They all measure the amount of oxygen that would be required to consume organic material in the water, BOD is the lowest (usually) as it measures demand from microbes eating easily digested organics (sugars etc), COD measures the demand from all other organics (alcohols etc) measured by digesting the material in strong chemical oxidants, and TOD is the total of the two. Oxygen demand is important to know in waste handling as reducing the oxygen in receiving stream can harm fish and other aquatic life.
Why does oxygen decrease the conductivity of copper?
Oxygen will make it impure and will react with the copper making it copper oxide, which isnt as conductive as copper alone
What is an oxygen conserving device?
Oxygen conserving device, such as a demand inspiratory flow system or pulsed-dose oxygen delivery system--uses a sensor to detect when inspiration (inhalation) begins.
A process by which nutrients increase in a lake while oxygen levels decrease as a result of human activity is known as?
Eutrophication
A patient has an 80 percent blockage of his left anterior descending coronary artery Describe what occurs in terms of myocardial oxygen supply and demand if his sympathetic nervous system is stimulate?
Increased myocardial contractility increases the oxygen demand for the myocardial cells. If the demand of oxygen exceeds the supply, death of myocardial tissue can occur.
Will atenolol increase the myocardial oxygen demand?
Yes.
Another name for rate-pressure product?
Myocardial Oxygen demand
What factors can increase myocardial oxygen demand?
Heart rate and ventricular wall tension
What does a pill imprinted with E117 do?
You need to consult a doctor before taking any medication or unknown pill. This is Labetalol Hydrochloride Selectively blocks alpha-1 receptors and nonselectively blocks beta-receptors to decrease BP, heart rate, and myocardial oxygen demand. AGIAN i must advise you to consult a doctor.
What effect does tachycardia have?
When the heart beats too rapidly, it pumps less efficiently and blood flow to the rest of the body, including the heart itself is reduced. The higher-than-normal heartbeat means there is an increase in demand for oxygen by the myocardium (heart muscle) - if this persists it can lead to myocardial infarction (heart attack), caused by the dying off of oxygen-starved myocardial cells.
Why does eRV decrease during exercise?
Inspiratory Reserve Volume is the excess volume above the tidal volume that can be inspired. During exercise, there is an increase in demand for oxygen which leads to a decrease in IRV.
Why does an exercise physiologist calculate pressure rate product?
Rate-pressure product is a good estimate of myocardial oxygen demand. RPP = Heart Rate X Systolic Blood Pressure. When using the RPP with patients with Coronary Artery Disease and with angina symptoms, it can indicate the oxygen demand at which Angina initially occurs (angina threshold).
Are all the capillaries open all the time?
no. they contract and open due to oxygen demand and some circulating messenger chemicals in the blood like epinephrine (adrenaline- you get nervous and your hands get clammy b/c of this)
What vessels that carry oxygen to the myocardial cells are called?
Coronary artery
What vessels carry oxygen to myocardial cells?
The circulatory system and heart are vessels that carry oxygen to myocardial cells. They help send blood throughout the entire body each time a person's heart beats.
Chest pain usually cased by insufficient supply of oxygen to the heart is?
myocardial infarction
