Question

12 multiple choice 2 points
which of the following properly ranks the permeability through a cell membrane:
small ions > small uncharged polar > large uncharged polar > small nonpolar
large uncharged polar > small ions > small uncharged polar > small nonpolar
small uncharged polar > small ions > large uncharged polar > small nonpolar
small nonpolar > small uncharged polar > large uncharged polar > small ions

13 true or false 2 points
action potentials are a brief reversal of membrane potential.
true
false

14 multiple choice 2 points
what type of receptors are utilized in olfactory structures?
proprioceptors
chemoreceptors
tactile
baroreceptors

Explanation:

Analyze membrane permeability ranking

$$ \text{Permeability order: small nonpolar} > \text{small uncharged polar} > \text{large uncharged polar} > \text{small ions} $$

Analyze action potential definition

$$ \text{Action potential} = \text{rapid, brief reversal of membrane potential} \implies \text{True} $$

Identify olfactory receptor type

$$ \text{Olfactory receptors detect airborne chemicals} \implies \text{chemoreceptors} $$

Answer:

Question 12

• small ions > small uncharged polar > large uncharged polar > small nonpolar
• large uncharged polar > small ions > small uncharged polar > small nonpolar
• small uncharged polar > small ions > large uncharged polar > small nonpolar
• small nonpolar > small uncharged polar > large uncharged polar > small ions (Correct answer)

Question 13

• True (Correct answer)
• False

Question 14

• proprioceptors
• chemoreceptors (Correct answer)
• tactile
• baroreceptors