Question

take, for example, a patient arriving in the er with a stroke. the first step is to image the brain, most often with ct, to determine whether the (1) is due to a clot or a bleed. if the stroke is due to a clot, then the clot - busting drug tpa can be used, but only within the first hours. cerebral angiography, which involves injecting a dye to make arteries in the brain stand out on x - ray imaging, might be used to visualize the (2) or directly deliver tpa to the clot through a catheter. less expensive and invasive than angiography, ultrasound can be used to quickly examine the carotid arteries and even measure blood flow through them.
a new imaging procedure, datscan, can assist with diagnosing (3) conditions involving dopamine, such as parkinsons disease. this imaging procedure uses a radioactive drug that binds (4) transporters (dat) paired with single - photon emission computed tomography (spect). the power of this technique is that it can image both the amount and distribution of dopamine in the brain. although datscan cannot diagnose parkinsons disease directly, it helps doctors distinguish parkinsons from other (5) conditions characterized by abnormal dopamine levels.

1. neurological 2. stroke 3. clot 4. neurodegenerative 5. dopamine
2. stroke 2. clot 3. neurodegenerative 4. dopamine 5. neurological
3. neurodegenerative 2. dopamine 3. neurological 4. stroke 5. clot
4. clot 2. neurodegenerative 3. dopamine 4. neurological 5. stroke
5. dopamine 2. neurological 3. stroke 4. clot 5. neurodegenerative

Explanation:

• For blank 1: The context is about a patient with a stroke, so "stroke" fits.
• For blank 2: If it's a clot - related stroke, cerebral angiography would visualize the "clot".
• For blank 3: Parkinson's disease is a "neurodegenerative" condition.
• For blank 4: The drug binds "dopamine" transporters as DaTscan is related to dopamine in Parkinson's.
• For blank 5: Parkinson's is a neurological disorder, so "neurological" to distinguish from other similar ones.

Answer:

1. stroke 2. clot 3. neurodegenerative 4. dopamine 5. neurological