Answer the following question given this paragraph:   Chemistry in Everyday Life Measuring Blood Pressure Blood pressure is measured using a device called a sphygmomanometer (Greek sphygmos = “pulse”). It consists of an inflatable cuff to restrict blood flow, a manometer to measure the pressure, and a method of determining when blood flow begins and when it becomes impeded (Figure 9.6). Since its invention in 1881, it has been an essential medical device. There are many types of sphygmomanometers: manual ones that require a stethoscope and are used by medical professionals; mercury ones, used when the most accuracy is required; less accurate mechanical ones; and digital ones that can be used with little training but that have limitations. When using a sphygmomanometer, the cuff is placed around the upper arm and inflated until blood flow is completely blocked, then slowly released. As the heart beats, blood forced through the arteries causes a rise in pressure. This rise in pressure at which blood flow begins is the systolic pressure—the peak pressure in the cardiac cycle. When the cuff’s pressure equals the arterial systolic pressure, blood flows past the cuff, creating audible sounds that can be heard using a stethoscope. This is followed by a decrease in pressure as the heart’s ventricles prepare for another beat. As cuff pressure continues to decrease, eventually sound is no longer heard; this is the diastolic pressure—the lowest pressure (resting phase) in the cardiac cycle. Blood pressure units from a sphygmomanometer are in terms of millimeters of mercury (mm Hg).   Q: What is used to measure blood pressure?   A:
OPTIONS:
- anemometer
- spectrometer
- barometer
- sphygmomanometer
sphygmomanometer
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Answer the following question given this paragraph:   Rutherford proposed a new atomic model that described the atom as comprised of a positively charged nucleus surrounded by negatively charged electrons. In this model, most of the atom was thought to be empty space. *Protons are positively charged and have a relatively large mass compared to electrons. Protons can be found in the nucleus of the atom.   Q: Where are protons found in the atom?   A:
OPTIONS:
- within electrons
- in the orbital
- outside the nucleus
- in the nucleus
in the nucleus
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Answer the following question given this paragraph:   Metamorphic rocks form as an existing rock is altered by high temperature or pressure.   Q: What kind of rocks form as an existing rock is altered by high temperature or pressure?   A:
OPTIONS:
- igneous
- sedimentary
- basaltic
- metamorphic
metamorphic
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Answer the following question given this paragraph:   Vascular disorders involve problems with blood flow. For example, a stroke occurs when a blood clot blocks blood flow to part of the brain. Brain cells die quickly if their oxygen supply is cut off. This may cause paralysis and loss of other normal functions, depending on the part of the brain that is damaged.   Q: Vascular disorders involve problems with the flow of what?   A:
OPTIONS:
- mucus
- bacteria
- saliva
- blood

blood
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