Which of the following statements is true regarding t cell receptors? (select all that apply.) they are formed by the rearrangement of v, j, c, and d gene segments. they contain variable and constant regions. they can be found in the bloodstream independent of t cells. they recognize antigen-mhc complexes. they are composed of two heavy (h) chains and two light (l) chains.

The true statements about he T cell receptors are 1, 2 and 4.

T cell receptors are the molecules found on the surface of the T lymphocytes. V(D)J recombination is the unique mechanism of genetic recombination that occurs only in the lymphocytes during the early stages of T and B cell maturation resulting in the T cell receptors. They recognize antigen fragments bound to MHC molecules. Majority of the T cell receptors consists of an alpha chain and a beta chain and a few with gamma and delta chains. Each chain is composed of a variable and a constant region. Within these chains are the complementary determining regions (CDRs) which determine the antigen to which the T cell receptor will bind.  

a motor homunculus represents a map of brain areas dedicated to motor processing for different anatomical divisions of the body.

homunculus represents the importance of various parts of your body as seen by your brain. as a result, they take up a lot of brain space. although the cortical homunculus is a curiosity, penfield's work in mapping the brain's relationship to the body was invaluable.

hello

answer: collecting information/data

reason: the student is going around and asking people questions to collect data

i hope this