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kifflom [539]
3 years ago
11

An arthropod has

Biology
1 answer:
enot [183]3 years ago
7 0
A. an open circulatory system


Explanation: In an open circulatory system, the blood is not enclosed in the blood vessels, but is pumped into a cavity called a hemocoel
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Why is water pollution an issue?
quester [9]

Answer:

It kills organisms that depend on water.

Explanation:

Dead fish often wind up on beaches due to pollutants in the water. Pollution also disrupts the natural food chain.

4 0
3 years ago
Read 2 more answers
Which organs are responsible for destroying old red blood cells?
Elan Coil [88]
<span>Spleen is also known as the graveyard of RBC, if it helps u 

1.Stem cells in bone marrow make all blood cells. RBC lives about 120 days. 
RBC are destroyed in Spleen. This process takes place as: 
- RBCs are ruptured. 
- Heme and globin portions separated. 
- Globin > amino acids. 
- Iron transferred in transferrin into the blood > into bone marrow for reuse. 
- Heme > Biliverdin > Bilirubin > liver >small intestine. 



2.Reticuloendothelial cells participate in the destruction of senescent RBC's. The spleen is a well suited site of RBC destruction given that cells must course through 2-3 micron apertures in the walls of splenic sinusoids, which is an ultimate test of cell pliability. Rigid cells are entrapped and phagocytosed. Intra-erythrocyte inclusions are removed during splenic circulation. 
Destruction of RBCs happens within reticuloendothelial cells – NOT in the circulation. Globin and heme get recycled, porphyrin is degraded to bilirubin which is conjugated by the liver and excreted in the gut. Rate limiting step is conjugation. Indirect (unconjugated) bilirubin is result if this doesn’t happen. 
Normally ~10% RBCs lyse while in circulation Þ Hgb gets released into circulation and rapidly disassociates into alpha and beta dimers which are bound by haptoglobin. The Hgb/haptoglobin complex is transported to the liver. If haptoglobin is depleted, free Hgb circulates and is filtered by the kidney. Free Hgb is either reabsorbed by renal tubular cells or excreted as free Hgb in the urine. 


3. Another site reported that 
RBC destroyed in liver and spleen, by macrophages. 2 million destroyed per second. 
Hb is released and iron is recovered and returned to bone marrow.</span>
3 0
3 years ago
Tench fish can’t survive salt concentrations beyond 1%. In which two areas can these fish be found?
dolphi86 [110]
The answer to your question is lakes and rivers. Hope this helps!
5 0
3 years ago
Read 2 more answers
How could an endocrine system disorder most likely affect the respiratory system? A. It could restrict air flow through the bron
stepan [7]
I agree with B because the other ones are not impacted by hormones. Out of those choices the only factor impacted by hormones is B
8 0
3 years ago
At Plymouth Elementary, first- through third-graders learn in a multiage classroom where children of varying ages and abilities
Alex
<h2>Principle of peer collaboration</h2>

Explanation:

  • Peer collaboration effort is a type of friend learning circumstances in which students cooperate, up close and personal, in a study hall setting toward a common comprehension called an assembly.
  • Information intermingling happens because of the social connection that happens between the students as they cooperate to accomplish the objectives of an assignment All things considered, how much information is shared between working together matches relies upon the communication between the students involved, even considering these restrictions, this examination has made commitments to inquire about on peer joint effort and learning with hypermedia.
  • Initially, we give proof that peer coordinated effort isn't an unequivocally successful technique for learning for all students directions and an errand that energized joint effort, the students in our investigation had very fluctuating degrees of achievement learning with an accomplice. Unstructured peer collaboration effort, like this investigation, is effortlessly used in the homeroom and may hold the hallucination of being a compelling method for guidance.
  • In any case, the aftereffects of this investigation, and others, recommend alert ought to be practiced in the wholehearted acknowledgment of unstructured friend joint effort as a type of teaching method for all students.
  • Hence, the right answer of fill in the blank is "peer collaboration"

3 0
3 years ago
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