Answer:
b). activation of T cells
Explanation:
An APC (antigen-presenting cell) can be described as an immune cell, which detects, uptakes, and informs the acquired immune response when an infection takes place. B cells, macrophages, and dendritic cells are antigen-presenting cells.
These cells play an important role in activation of T cells. T cells are unable to recognize soluble or free antigens and can only recognize antigens processed and presented by carrier molecules, such as MHC molecules.
Presence of MHCII molecules is a defining feature of APCs that process and present antigens to T cells. Hence, all antigen-presenting cells help in activation of T cells.
Thus, the correct answer is option (b).
The gummy bear would absorb the solution and expand.
Answer: While food and water supply, habitat space, and competition with other species are some of the limiting factors affecting the carrying capacity of a given environment, in human populations, other variables such as sanitation, diseases, and medical care are also at play
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Answer:
conditioned response
Explanation:
The conditioned response, in classical conditioning, is the learned reaction that is elicited by an organism to a previously neutral stimulus, which is now a conditioned stimulus.
In the experiment of Pavlov, where the dog was taught to salivate by presenting food and the sound of the bell at the same time, the dog learns to salivate at the sound of bell alone even without food. This response of the dog is termed a conditioned response to a conditioned stimulus (sound of bell).
I believe the answer is limestone..
