Hello, I’m Richard Kent, and today we’re delving into the intricate world of nerve cells, a captivating aspect of our nervous system. The complexity of this topic is vast, so let’s focus on a segment, understanding the transmission of nervous impulses to the periphery of our bodies.
The Marvel of Our Nervous System
Our nervous system, an astonishing feat of design, features a central processing powerhouse – the brain. Weighing about three pounds and safeguarded by our skulls, the brain consumes a staggering twenty percent of the body’s energy. The delicacy of this system is evident as a mere three-second deprivation of oxygen or sugar renders us unconscious, with death looming in just three minutes.
The Intricacies of Nervous Impulses
Now, let’s unravel the transmission of nervous impulses, a feat managed by the intricate network of nerve cells. To comprehend the scale of this complexity, envision a wiring diagram. If we were to chart the wiring diagram of the human body, it would surpass the complexity of the entire global telephone system, including mobile phones and satellites.
The Electrical Symphony Within
As impulses travel along nerves at an astonishing rate of 250 miles per hour, the underlying mechanism is a symphony of electrical events within nerve cells. Picture this: the cell center is negative, the outside positive. The polarity, an electrical charge difference, is maintained by a semi-permeable membrane.
The Dance of Ions: A Ballet of Polarity
This membrane, selectively permeable to potassium and sodium ions, orchestrates a dance of electrical polarity changes. During depolarization, a gate opens, allowing sodium ions to flood in, creating a positive charge inside. This triggers an action potential for a fleeting moment. Subsequently, the gate closes, preventing further sodium influx. The polarity then reverses, courtesy of potassium ions exiting through a different gate.
The sheer complexity of this system, involving orchestrated changes in electrical polarity, is beyond the scope of chance evolution. This intricate dance of ions reveals a design that speaks of an intelligent creator – Jesus Christ.
As we ponder the miraculous design of nerve cells, may we stand in awe of the supernatural intelligence woven into our very being. Thank you for joining me on this journey through the marvels of our nervous system. God bless you.