Medical Marvels trivia
Medical Marvels Mini Quiz
Test your knowledge with these top questions!
What does a pacemaker primarily help regulate?
A pacemaker monitors the heart and sends electrical pulses when the natural rhythm becomes too slow.
Penicillin spares human cells mainly because human cells lack what?
The drug binds bacterial wall-building enzymes that human cells do not make, limiting direct damage to human tissue.
How do doctors commonly deliver a leadless pacemaker?
Doctors guide a leadless pacemaker through a catheter in a vein until the device reaches the heart.
Cochlear implants primarily provide access to which sense?
Unlike hearing aids, cochlear implants bypass damaged ear structures and stimulate the auditory nerve with electrical signals.
Which type of wave does an MRI scanner send to excite hydrogen nuclei?
Radio-frequency pulses briefly disturb aligned hydrogen nuclei, and returning signals help create the image.
Which mold helped Alexander Fleming discover penicillin's antibacterial effect?
Fleming saw a clear zone around the colony where nearby Staphylococcus bacteria failed to grow.
What type of pathogen does penicillin primarily fight?
Penicillin targets structures in susceptible bacteria, while viruses lack those targets and do not respond to antibiotics.
Which element supplies most of the signal in a conventional MRI scan?
Water and fat contain abundant hydrogen, giving conventional MRI many protons to detect throughout the body.
What does the M in MRI stand for?
Strong magnetic fields align hydrogen spins, while radio-frequency pulses change spin states and produce detectable signals.
Where do doctors usually place a conventional pacemaker's generator?
A conventional generator usually sits under the skin below the collarbone, with leads connecting it to the heart.