Answer: B Voltage gated potassium channels.
A) voltage-gated sodium channels
B) voltage-gated potassium channels
C) sodium potassium pumps
D) chloride channels
Explanation:
Tetraethylammonium is a pH- potassium channel blocker;which prevents escape of potassium ions from the intracellular layer of the axon,by blocking the channels. This increases positive ion concentration of the inner axon,( together with other positive charged molecules in the axoplasm). since potassium is a positively charged and intracellular ion
Due to the fact that(TEA) is pH -potassium ion blocker; it has no inhibitory effect on the voltage-gated sodium ion channels, so action potential can progresses. But after the sodium gated channels were closed, action potential drops but the concentration of positive charged potassium ions increases because-
They cannot leave the axoplasm since the potassium votage gated channels has been shu by (TEA)t. This stabilizes the membrane potential, and prevented the cells from returning to resting membrane potential .
This diagram depicts the process in which one singular cell produces two genetically identical daughter cells, also known as mitosis.
Hope this helps!
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THE TWO MOST COMMON REASON FOR MODIFYING THE LAND IN SOUTH AND SOUTH ASIA IS
(i) first is significantly, the area of lands categorized as under forest/woodland and wetlands declined .At the same time, cultivated area increased .
(ii) another is requirement of additional land due to increase in population.
Explanation:
Between 1880 and 1980, the South and Southeast Asian landscape underwent dramatic modification.The 81% of the lost forest and wetland vegetation appears to have been converted into expanded agricultural land.
Human population in this region more than tripled between 1880 and 1980, producing an enormous demand for additional land for cultivation.
Answer:
Though chemical fertilizers increase crop production; their overuse has hardened the soil, decreased fertility, strengthened pesticides, polluted air and water, and released greenhouse gases, thereby bringing hazards to human health and environment as well.
