Answer:
Explanation:
The immune system protects the body from possibly harmful substances by recognizing and responding to antigens. Antigens are substances (usually proteins) on the surface of cells, viruses, fungi, or bacteria. Nonliving substances such as toxins, chemicals, drugs, and foreign particles (such as a splinter) can also be antigens. The immune system recognizes and destroys, or tries to destroy, substances that contain antigens.
Your body's cells have proteins that are antigens. These include a group of antigens called HLA antigens. Your immune system learns to see these antigens as normal and usually does not react against them.
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.
Answer:
Option 1. i.e. They are the most abundant type of cell in a typical plant body.
Explanation:
Parenchyma cell are cells that are present in plant body to perform cellular respiration and photosynthesis. These type of cell are most easily available cells which present in large amount in any typical plant body.
There are many roles that parenchyma cells may serve. Their work is mainly based on their place in the plant, which can define if they will be used in storage, photosynthesis, or repair damage.
Answer:
N is for number one, make sure to take care of yourself above all others
A is for attractive, inside and out
U is for upstanding, the honorable way to be
R is for romp, you know how to have fun!
A is for achievements, the many over a lifetime
Q is for qualified, no doubt you are!
Explanation:
How unique is the name Nauraq?
Out of 5,933,561 records in the U.S. Social Security Administration public data, the first name Nauraq was not present. It is possible the name you are searching has less than five occurrences per year.
Weird things about the name Nauraq:
Your name in reverse order is Qaruan. A random rearrangement of the letters in your name (anagram) will give Qrauna hope it helps plz Mark me brainliest
Wind turbines convert wind energy into electrical energy that we can use.
Windmills convert wind energy into mechanical energy to grind wheat into flour.
