In photoelectric absorption to dislodge an inner-shell electron from its atomic orbit, the incoming x-ray photon must be able to transfer a quantity of energy
a. less than the energy that holds the atom together.
b. 10 times as great as the energy that holds the atom together.
c. as large as or larger than the amount of energy that holds the electron in its orbit.
d. equal to or greater than 1.022 MeV, regardless of the energy that holds the electron in its orbit.
c. as large as or larger than the amount of energy that holds the electron in its orbit.
You might also like to view...
The FDA's main objective for enforcing laws in regards to medication use in animals is __________
A) animal abuse prevention B) animal comfort C) patient safety D) all of the above
Your patient is a 7-year-old male pedestrian who was struck by a vehicle. Your assessment reveals bleeding from the right auditory canal. Which of the following describes the most appropriate way to manage this?
A) Determining the presence or absence of cerebrospinal fluid is a low priority. Pack the auditory canal with sterile gauze to control bleeding. B) Use a "halo" test to determine whether cerebrospinal fluid is in the blood. If it is, loosely cover the ear with a sterile dressing to prevent contamination while allowing blood to flow freely from the ear. If cerebrospinal fluid is not present, pack the ear canal with sterile gauze to control bleeding. C) Determining the presence or absence of cerebrospinal fluid in the blood is a low priority. Loosely cover the ear with a sterile dressing to prevent contamination while allowing blood to flow freely from the ear. D) Check the glucose level in the blood draining from the ear. If it is less than the patient's blood glucose level, there is cerebrospinal fluid present. Cover the ear loosely with a sterile dressing to prevent contamination while allowing blood to flow freely from the ear. If the glucose level of the blood from the ear is the same as the patient's blood glucose level, pack the auditory canal with sterile gauze to control bleeding.
The main side effect of fibrinolytics is:
A) catastrophic hemorrhage B) allergic reaction C) ST elevation D) congestive heart failure
Which of the following is unique to an individual, is present on every cell in that person's body, and activates T cells?
A. B cells B. Complements C. Cytokines D. Major histocompatibility complex (MHC) E. Natural killer (NK) cells