Muscle cells have positively charged ____ ions in greater concentration outside the muscle cell than inside the cell
a. sodium
b. potassium
c. chloride
d. calcium
a
You might also like to view...
If the parent cell in meiosis has 60 chromosomes, how many chromosomes will the daughter cell have?
A. 20 B. 30 C. 60 D. 120
All of the following are examples of positive feedback, except
A) blood clot formation. B) release of chemicals from the blood vessels after injury. C) decrease bleeding after injury. D) increase heart rate after blood loss. E) relaxation of smooth muscles' blood vessels when body temperature goes up.
The action of the masseter muscle is to ________ the mandible
A) depress B) elevate C) abduct D) flex E) open
Binding of acetylcholine with its receptor on muscle cells causes
A) opening of a ligand-gated sodium channel. B) a gap in the cell membrane for calcium diffusion. C) vesicular release of sodium ions. D) opening of a voltage-gated calcium channel.