This preview shows page 1. Sign up to view the full content.
Unformatted text preview: B) Action potentials occur only in nerve cells; passively conducted signals occur only in muscle cells C) Action potentials are transmitted over short distances; passively conducted signals are conducted over long distances D) Action potentials are signals of fixed size and duration; passively conducted signals are not signals of fixed size and duration 5. Which of the following mechanisms decrease intracellular [Ca2+]? Choose the correct option. A) The calcium pump B) Intracellular calcium-binding proteins C) Organelles such as mitochondria and endoplasmic reticulum D) All of the above 6. Which of the following factors determines the ion selectivity of specific ion channels? Choose the correct option. A) Number of protein molecules assembling to form a pore B) Number of ion channels in the membrane C) Nature of the R groups lining the ion channel D) Gating properties 7. Protein shape influences protein function. A) True B) False...
View Full Document
- Winter '08