The adaptive immune system is the immune system that takes place after the first exposure to a specific antigen either from vaccination or a pathogen. Adaptive responses are of two types: the cell-mediated and humoral immune response, the cell-mediated immune response occurs with the help of T cells, and where is humoral immune response is B cells and antibodies.

Vaccination targets the adaptive immune system as they produce antibodies against the pathogen provided by vaccination.

Thus, the correct answer is option D. the adaptive immune system.

3 0

3 years ago

One sign of yellow fever is that the whites of the eyes and the skin gain a yellowish tint. given just this information, you can

kogti [31]

the kidney....................................................

6 0

3 years ago

The solutions in the two arms of a U-tube are separated by a membrane that is

IgorC [24]

Answer:

See the answer below

Explanation:

Recall that: Water potential = pressure potential + solute potential

Since the system is an open one;

Water potential = solute potential = -iCRT

i = number of particles the molecle will make in water (1)

C = molar concentration

R = Pressure constant = 0.0831 liter bar/mole K

T = temperature in kelvin = 22 + 273 = 295 K

To calculate water potential on side A:

C = 1 M

Water potential = - (1 x 1 x 0.0831 x 295) = -24.51 bars

For side B:

C = 2 M

Water potential = - (1 x 2 x 0.0831 x 295) = -49.03 bars

Since side A has higher water potential than side B, water will flow from side A to side B until equilibrium is established between the two sides. Water always flows from the region of higher water potential to the region of lower water potential.

6 0

3 years ago