What do pheromones stimulate?
A. Olfactory glands
B. Taste cells
C. Hair cells
D. Supporting cells
E. Olfactory cells
Answer: E
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Infants born prematurely frequently develop respiratory distress syndrome of the newborn because they have too few alveoli to exchange O2 and CO2 efficiently.
Answer the following statement true (T) or false (F)
Answer the following statements true (T) or false (F)
1. The symbol for a sodium atom that has lost one electron would be Na. 2. The symbol for a sodium atom that has lost one electron would be Na+. 3. Atom X has eight electrons, two in its first energy level and six in its second energy level. It would most likely form an ion with a plus 2 charge. 4. Covalent bonds do not usually dissociate in water. 5. Covalent bonds dissociate into ions when dissolved in water.
The body system associated with touch, vision, hearing, smell, and taste is the ________ system
Fill in the blank(s) with correct word
How do low-density lipoproteins (LDLs) move into cells?
A. LDLs are transported through a pump that is also an ATPase. B. LDLs diffuse through the phospholipid bilayer. C. LDLs diffuse through channels in the membrane. D. LDLs are engulfed through receptor-mediated endocytosis.