Phospholipids make up most of the lipid part of the cell membrane. Since water exists on both the outside and inside of a cell, which of the following phospholipid arrangements makes the most sense?
A) a single layer of phospholipids with the polar heads facing outside the cell
B) a single layer of phospholipids with the polar heads facing inside the cell
C) two back-to-back phospholipid layers with the polar heads facing out on both sides
D) two back-to-back phospholipid layers with the non-polar tails facing out on both sides
C
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Receptor cells for gustation and olfaction have what in common?
A. Both olfactory cells and gustatory cells detect chemical senses. B. Both olfactory cells and gustatory cells are neurons. C. Both olfactory cells and gustatory cells have microvilli. D. Both olfactory cells and gustatory cells are banana-shaped.
Blood is pumped through the entire body in ________________________________________ circulation
Fill in the blank(s) with correct word
Which of the following teeth are the carnassial teeth?
a. upper 4th molars c. lower premolars b. upper 4th premolars d. lower canines
Phasic receptors
A) are attune to parameters that the body must continuously assess. B) once threshold is reached by a stimulus will always generate action potentials. C) are quick to adapt to a particular stimulus intensity. D) slowly decrease the frequency of action potentials generated to a constant stimulus.