A nonfunctional CD4 protein on a helper T cell would result in the helper T cell being unable to interact with a class II MHC-antigen complex
Importance of Class II MHC-Antigen complex
- CD4+ T cell-dependent immunological responses need antigen presentation restricted to MHC class II.
Professional antigen-presenting cells (APCs) perform a range of functions that are essential for the generation of an effective and specific immune response.
- Dendritic cells (DCs) investigate their surroundings and gather foreign antigens, such as those derived from bacteria or viruses, before activating CD4+ and CD8+ T cells to initiate adaptive immune responses against these antigens.
- The thymus' DCs and epithelial cells express (and also capture) a diverse set of self-proteins that contribute to both central and peripheral tolerance.
Recognizing the processes involved in the creation (and stability) of peptide-MHC class II complexes in APCs provides crucial information about T cellular metabolism including both normal and pathological settings.
Hence, the correct answer is option D
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# SPJ4
Answer:
parent cell diploid cells
Explanation:
Explanation:
The virus killed people directly by causing massive hemorrhages and edema in the lungs. Modern analysis has shown the virus to be particularly deadly because it triggers a cytokine storm (overreaction of the body's immune system
Vasectomy and Tubal ligation are operations that have an effect on meiosis in individuals who have elected to have these operations in that it causes meiosis to stop.
A vasectomy or Tubal ligation are operations that are often performed as a method of birth control. A vasectomy is the male version of the operation and includes a procedure that negates the gametes or sex cells from reaching the sperm and being ejected from the body, thus preventing fertilization.
Tubal ligation is a similar process performed on women. The goal of this operation is the same as in the vasectomy, to stop the "egg cell" from being released and thus preventing it from being fertilized. Both procedures have been shown to cause meiotic arrest in individuals following the operation, In some cases, meiosis resumes after some time.
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Answer:
Ventral horn consists of mostly Cell bodies of somatic motor neurons.
Assumed Information:
<em>Assuming your question has multiple choices</em>
<em />
A Central processes of sensory neurons
B Cell bodies of visceral motor neurons
C Long myelinated and unmyelinated axons
D Cell bodies of somatic motor neurons
Reasoning:
<em>The ventral horns consist entirely of inter-neurons (connects neuron to neuron). The ventral horns have some inter-neurons, but mainly house cell bodies of somatic motor neurons. These motor neurons send their axons out to the skeletal muscles (their effector organs) via the ventral rootlets that fuse together to become the ventral roots of the spinal cord. </em>
