Why can you not catch the same cold twice, but a new cold will make you sick for a week or two?
What will be an ideal response?
Your body stores memory cells that can remember the antigens of a cold virus it has fought before. It will then mount an aggressive defense against that specific invader very quickly. If the immune system has not been exposed to a strain of the virus with different antigens, it will have to start from scratch. This may take several days.
You might also like to view...
You wish to test the same unknown food for the presence of sugars. Describe how you would do so
What will be an ideal response?
Identify the non-lipid molecule.
A. Phospholipids B. Cholesterol C. Steroids D. Glycogen E. Triglycerides
Which of the following mechanisms normally repairs pyrimidine dimers?
A) base-excision repair B) light repair C) single-strand repair D) error-prone repair E) SOS response repair
Humans differ from other animals, such as dogs and bears because humans are macrosmatic and other animals are microsmatic
Indicate whether the statement is true or false.