What is the role of sustentacular cells in the olfactory epithelium?
A. Produce new bipolar receptor cells
B. To form basal stem cells
C. To oxidize volatile hydrophobic odorant molecules to make them less soluble
D. To repair damaged receptor cells
Answer: C
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The corticobulbar tracts originate from the ________ region of the motor homunculus within the primary cortex.
A. palmar B. facial C. cardiac D. genitalia E. respiratory
External landmarks (surface anatomy) on the body not only allow for examination of surface features, but also offer an opportunity to locate certain internal structures.
Answer the following statement true (T) or false (F)
The apical ectodermal ridge
A. plays a role in differentiation and elongation of the limb. B. ossifies prior to formation of the hand and foot plates. C. forms at the proximal end of each limb bud. D. secretes mesoderm for muscle formation. E. must undergo apoptosis before the limb can develop.
Paul has a horrible chainsaw accident and cuts several major blood vessels in his head and neck. As a result of this injury, you would expect to observe all of the following except
A) an increased heart rate. B) an increase in cardiac output. C) an increased secretion of renin by the kidneys. D) cold, clammy skin. E) an increased total peripheral resistance.