In the atmosphere mostly as carbon dioxide.
Answer:
Option A, The lymphocytes express antigens specific for the antibodies in the assay
Explanation:
The options for the question are
a) The lymphocytes express antigens specific for the antibodies in the assay
b) The lymphocytes do not have antigens specific for the antibodies in the assay
c) This is not a valid method for identifying HLA agents.
Solution -
The aim of conducting this assay is to use the ability of the microlymphocytotoxicity assay (CdL) to detect the antibodies specific to the antigens based on the complement dependent assay.
The B and T lymphocytes are tested at both warm and cold temperatures and then the result obtained is compared with other non –complement based test results. HLA-ABC alloantibodies are weak in reactivity and specific to B cell hence they can be identified only through the CdL assay.
Hence, option A is correct
Answer:
Bones. They are vertabrates, which means they have a backbone
Explanation:
Fish, reptiles, amphibians, birds and mammals all have bones
The endocrine and nervous system are considered extrinsic homeostatic regulatory mechanisms.
<h3>What is the difference between endocrine and nervous system? </h3>
1) In the nervous system electrical impulse carries message to different organs of the body and in the endocrine system it releases hormones and provide chemical signal to command an organ.
2) Nerve or electrical impulse transmit through neurons and hormones travel through bloodstream.
3) The nervous system can control voluntary as well as involuntary and all the activities and operation under the endocrine system are involuntary.
These two system help in regulation of the electrical and chemical possess that relay information throughout and between the brain and body .
To learn more about nervous system and endocrine system refer to:
brainly.com/question/10054629
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