<span>The climber asks “On belay”</span>
The belayer answers “Belay On”
The climber asks “Climbing”
The belayer answers “Climb on”
The climber then may
mount the wall. When the climber reaches the top, or is ready to come down, the
climber must say “Ready to Lower” so that the belayer knows that
the climber wants to come down.
Another name for helper T cells is CD4+ (now options are correct), it is due to the presence of specific cell surface receptors.
<h3>What are T cells?</h3>
T cells are also called CD4- + positive cells have essential functions in the immune system by triggering adaptive immune responses.
These cells CD4- + positive cells contain specific cell surface receptors that can be identified by biochemical analyses.
In conclusion, another name for helper T cells is CD4+ (now options are correct), it is due to the presence of specific cell surface receptors.
Learn more about T cells or CD4+ cells here:
brainly.com/question/9875046
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Answer:
an international organization that conducts research worldwide to track the spread of diseases and other health issues
Explanation:
It informs society how it can end up being deadly and society reacted to that by having safe sex and being aware of who they are sleeping with
