Home
Class 12
BIOLOGY
Observe the action potential and state t...

Observe the action potential and state the correct events that occur in Phase I and Phase II .

A

Phase I : Sodium channels open causing movement of sodium ions from the extracellular fluid to the axoplasm . Phase II : Potassium channels open causing movement of potassium ions from the extracellular fluid to the axoplasm.

B

Phase I : Sodium channels open causing movement of sodium ions from the extracellular fluid to the axoplasm . Phase II : Potassium channels open causing movement of potassium ions from the axoplasm to the extracellular fluid.

C

Phase I : Sodium channels open causing movement of sodium ions from the axoplasm to the extracellular fluid . Phase II : Potassium channels open causing movement of potassium ions from the extracellular fluid to the axoplasm.

D

Phase I : Sodium channels open causing movement of sodium ions from the axoplasm to the extracellular fluid . Phase II : Potassium channels open causing movement of potassium ions from the axoplasm to the extracellular fluid.

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Similar Questions

Explore conceptually related problems

Select the correct statement about G 1 phase

Action potentials occur when :

Select the correct statement about G_(1) phase.

Select the correct statement about G_(1) phase.

Briefly describe the events that occur during the luteal phase of the menstrual cycle.

Polyp phase does not occur in

Consider the following four statements (I - IV) related to cell cycle, and select the correct option stating them as true [T] and false [F]. i. G_1 phase is a metabolically active stage of the cell cycle. ii. Interphase is the phase of actual cell division. iii. The number of chromosomes doubles in S-phase. iv. The cells that do not divide further exit the G_1 - phase to enter a quiescent stage.

(a) Explain the menstrual phase in a human female. State the levels of ovarian and pituitary hormones during this phase. (b) Why is follicular phase in the menstrual cycle also referred as proliferative phase ? Explain. (c) Explain the events that occur in a Graafian follicle at the time of ovulation and thereafter. (d) Draw a Graafian follicle and label antrum and secondary oocyte.

(a) Explain the menstrual phase in a human female. State the levels of ovarian and pituitary hormones during this phase. (b) Why is follicular phase in the menstrual cycle also referred as proliferative phase ? Explain. (c) Explain the events that occur in a graffian follicle at the time of ovulation and there after. (d) Draw a graffian follicle and label antrum and secondary oocyte.

Briefly describe the events that occur during the proliferative phase of the menstrual cycle.