The type of ion channels responsible for the depolarization phase of an action potential are Na+ (sodium)
channels. Sodium ions flow inward through the sodium channels and cause an
increase in the concentration of positively charged ions in the cell; this in
turn, leads to depolarization.
A threshold<span> ensures that </span>action potentials<span> are not produced unless the </span>neuron<span> has received enough </span>
Answer:
The correct option is : d. smooth muscles.
Explanation:
The urinary bladder is a muscular, hollow organ present in the pelvis, that is responsible for collecting and storing urine, before the removal of urine by the process of urination.
It is surrounded by a layer of smooth muscles. The smooth muscle of the urinary bladder contract and expel the urine from the body, by the process of urination.
