Nicotinic receptor activation causes the opening of the channel formed by the receptor. This increases the Na+ movement into the target cell, leading to depolarization and generation of the action potential. This rapidly developing change, termed a fast EPSP, is illustrated in Figures 4.3, and 6.2.
And, anecdotally at least, they act as an overall stimulant, producing a titillating, awakening effect and increasing the acuity of the senses. Peppers, especially the hot capsicum (chili) peppers, produce a burning sensation on the skin and mucous membranes, including the inside of the mouth. For the uninitiated, a relatively mild hot pepper can seem intolerably strong and truly hot peppers may even cause blistering of the lips and palate.
Discolored Pepper Stems. If your pepper plant has a dark black ring that encircles the stem, it may have a disease known as phytophthora blight. Besides your pepper plants turning black, you will notice your plant wilting and suddenly turning yellow.heyâre easy to grow, easy to care for, and are seldom affected by pepper plant problems. However, many people do have issues on occasion with discolored pepper stems or with pepper plants turning black.