Answer:
Helper T cells are arguably the most important cells in adaptive immunity, as they are required for almost all adaptive immune responses. They not only help activate B cells to secrete antibodies and macrophages to destroy ingested microbes, but they also help activate cytotoxic T cells to kill infected target cells. As dramatically demonstrated in AIDS patients, without helper T cells we cannot defend ourselves even against many microbes that are normally harmless.
Helper T cells themselves, however, can only function when activated to become effector cells. They are activated on the surface of antigen-presenting cells, which mature during the innate immune responses triggered by an infection. The innate responses also dictate what kind of effector cell a helper T cell will develop into and thereby determine the nature of the adaptive immune response elicited.
In this final section, we discuss the multiple signals that help activate a T cell and how a helper T cell, once activated to become an effector cell, helps activate other cells. We also consider how innate immune responses determine the nature of adaptive responses by stimulating helper T cells to differentiate into either TH1 or TH2 effector cells.
Answer:
chronic phase of leukamia (c)
Explanation:
The Philadelphia chromosome is specifically associated with CML, a disease that typically has a chronic phase of variable length. CMLdoes not have a viral etiology. Fractures are associated with multiple myeloma. Hyperuricemia is more closely associated with acute leukemias than chronic leukemias
<u>Epithelial</u> <u>tissue</u> provides a covering such as skin, the linings of the various passages inside the body.Epithelial tissues are widespread throughout the body. They form the covering of all body surfaces, line body cavities and hollow organs, and are the major tissue in glands. The main functions of epithelia are protection from the environment, coverage, secretion and excretion, absorption, and filtration.
<u>Nerve</u> <u>tissue</u> is made up of nerve cells (neurons) and is used to carry "messages" to and from various parts of the body. Theyre found in the brain, spinal cord, and nerves. It is responsible for coordinating and controlling many body activities. ... The cells in nervous tissue that generate and conduct impulses are called neurons or nerve cells. These cells have three principal parts: the dendrites, the cell body, and one axon.
Hope this helped you, have a good day bro cya)
Answer:
yes ofc bro hope to see you then
Explanation:
Answer:
I would say D.
Explanation:
(I'm sorry if this is wrong. Please correct me if so.) Good luck!