Figure Q2-37 Shows a Whole-Cell Sodium Current (Bottom Trace) Elicited

question 5

Essay

Figure Q2-37 shows a whole-cell sodium current (bottom trace) elicited by stepping the membrane potential from -70 mV to 0 mV (top trace). The dashed line is 0 nA. Upon depolarizing the membrane, there is an inward current. This whole-cell current is a reflection of the cumulative activity of many individual ion channels. What is the probable state of an individual sodium channel at each point (A, B, and C)? Figure Q2-37

---

Definitions:

Pfr

The far-red absorbing form of phytochrome, a plant photoreceptor involved in regulating plant growth and development in response to light conditions.

Pr

An abbreviated term that could stand for various things, without additional context, its specific meaning is unclear. NO.

Phytochrome

A photoreceptor protein in plants that regulates growth, development, and flowering in response to light.

Photoperiodism

The physiological response (such as flowering) of plants to variations in the length of daylight and darkness.