Plz help me ASAP with this test question Hemostasis is the natural process that stops blood loss when an injury occurs. it involves three steps: (1) vascular spasm or vasoconstriction : (2) platelet plug formation and 3) coagulation . The platelet plug forms almost directly after a blood vessel has been ruptured. Within twenty seconds of an injury in which the blood vessel's epithelial wall is disrupted, coagulation is initiated and it takes only about sixty seconds until the first fibrin strands begin to intersperse among the wound. What step * (s) must be taken at the wound site for this plug formation to be initiated?

A. The clotting of a skin injury is caused by exposure to air, specifically oxygen, that activates platelet production.

B. Endothelial cells at the wound site stop secreting coagulation and aggregation inhibitors heparin and thrombomodulin

C. Clotting factors take part in a cascade of chemical reactions that eventually create a mesh of fibrin within the blood.

D. Thrombin is released to facilitate the conversion of the plasma protein called fibrinogen into long, insoluble fibers of the protein, fibrin

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.

1. a host loses nutrients to a parasite

2. a parasite only benefits when the host is alive (cause if the host dies the parasite dies with it )

3. producers to consumers

4. the tapeworm is a parasite

5. they convert energy from the sun (photosynthesis)

6. sunflower-robin (i think im 80% sure)

7. producer

8. consumer

9. prey

10. fresh water snails ( cause the green algea is the producer and the snails are the primary consumers and the small fish consumer so is the big fish)

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above