The “hotspot” in McKeegan’s analysis of the stardust from collected from the Stardust spacecraft showed a extremely tiny piece of a long-gone red giant star.    It was conspicuous because…

ISOTOPE RATIOS AS AN ANALYTIC TOOL   Some meteorites show 18O and 17O ratios very similar to SMOW, but others deviate noticeably from Earth’s ratios.

If a near-Earth asteroid was coming toward Earth, what would be the best way to save the planet?

You are caring for a patient who is complaining of diffuse musculoskeletal pain, shortness of breath, and atraumatic priapism. You suspect:

Which of the following is TRUE concerning sickle cell anemia?

Parasympathetic functions include all of the following, except 

Collateral ganglia contain neurons that innervate tissues and organs in which cavity?

What ethnicity is most likely to suffer from sickle cell disease?

Which of the following statements concerning the parasympathetic division of the autonomic nervous system is false? 

Which of the following neurons is most likely to be adrenergic (release norepinephrine)?