Final answer:
Temperature is the vital sign that is often measured at the tympanic membrane using a tympanic thermometer.
Step-by-step explanation:
The vital sign often measured at the tympanic membrane is d) Temperature. The tympanic membrane, also known as the eardrum, is a common site for measuring body temperature using a tympanic thermometer. This method provides a rapid and accurate reflection of the body's core temperature, which is a vital sign used to measure the body's basic functions.
Other vital signs include heart rate (pulse), measured in beats per minute, breathing rate (respiratory rate), typically counted by the number of breaths per minute, and blood pressure, which is measured using a sphygmomanometer and stethoscope to listen for Korotkoff sounds indicating turbulent blood flow. These vital signs, including body temperature, can be critical indicators of health and are routinely checked during medical examinations.