Answer:
C
Explanation:
Jonas Salk developed a vaccine that almost eliminated Polio as a threat. Whole buildings prier to his time were devoted to housing the victims of Polio (one of whom was FDR) who had to make their skeletal systems work with the new restrictions.
The answer is C
Endocrinology. That would be the correct answer. {:)
Answer:
the correct sequence of the events happened during nerve impulse is (d): 2,1,4,3
Explanation:
Originally K+ ions remains inward the membranes while Na+ ions remains outward to maintain a resting potential of membrane.
Upon stimuli Sodium channels open on membrane and Na+ diffuses inward leading to the depolarization of membrane that is it becoming more positive due to Na+ and K+ ions.
To regain it polarized state or in repolarization state Potassium channels open and K+ begun to diffuse outward while Sodium channels gets closed and Na+ ions remains inside the membrane.
Potassium channels are not efficient as compared to Sodium Channels, so an excess amount of K+ion move outward so Hyperpolarization state achieved.
As the both ions are on the wrong side and will not be available for the next nerve impulse. Hence in Refractory period by the help of Na+/K+ pum, both ions move back to their original place and membrane achieve its resting membrane potential state.
Sunlight = Food for plants and vegetables that we eat to get energy and to stay alive. To produce flowers, and other plants to give pollen to animals for food and water.
Ex. Humming birds, bees, butterfly's and many more.
Answer:
Explanation:
Nerve cell as they send electrical impulses.
It cant be cardiac cell as that is in the heart.
And the epitherial cell covers the inside and outside off the stomach