What is the structural unit of compact bone?
A) the osteon
B) lamellar bone
C) osseous matrix
D) spongy bone
A
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What hormone reduces blood pressure and blood volume by inhibiting nearly all events that promote vasoconstriction and sodium ion and water retention?
A) atrial natriuretic peptide (ANP) B) antidiuretic hormone (ADH) C) thyroxine D) aldosterone
A flat EEG is a clinical sign of ________
A) brain tumor B) brain death C) brain abscess D) epileptic seizure
Of the different sources of genetic variability, which one could be defined as permanent, transmissible changes to the DNA coding sequence often caused by outside environmental factors?
A) independent assortment
B) crossing over
C) random fertilization
D) mutation
Why does nutrient-rich blood of the hepatic portal vein pass first through the liver before this blood is returned to the heart?
A. To allow the liver to add more wastes to the blood B. The liver needs more nourishment than other tissues; hence nutrients first pass through the liver C. To allow the liver to add more nutrients to the blood D. To allow the liver to store or modify the nutrients