<span>Right atrium
The answer here requires you to know what the systemic circuit is. That's the circuit that takes oxygenated blood from the heart to the rest of the body and then returns the deoxygenated blood to the heart. With that in mind, let's look at the 4 chambers of the heart.
Left atrium gets oxygen rich blood from the lungs and pumps it into the left ventricle.
So we know this isn't the correct chamber and we can also ignore the left and right ventricles as well since they receive blood from their respective atriums.
That leaves only the right atrium and it's definition is
Right atrium gets oxygen poor blood from the body and pumps it into the right ventricle.
And that does sound like the correct chamber to me. So the answer is "right atrium"</span>
Answer:
Scavengers
Parasites
Consumers
Predators
Carnivores
Omnivores
Herbivores
Explanation:
In biology, an organism is any organic, living system that functions as an individual entity. All organisms are composed of cells. Organisms are classified by taxonomy into groups such as multicellular animals, plants, and fungi; or unicellular microorganisms such as protists, bacteria, and archaea
using cars that get lower gas mileage
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
Learn more about APC here,
brainly.com/question/13588471
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