The essential change of blood clotting is A: platelet aggregation B: rouleaux formation C: agglutination of erythrocyte D: fibrination

The gene that encodes Factor VIII, a protein that functions in the blood-clotting pathway, contains ___ exons. Mutations in this large gene are responsible for the most prevalent form of the blood disorder hemophilia.

In patients with thrombocytopenia, spontaneous bleeding spots and<br/>purpura often appear on the skin and mucosa, mainly due to () A: Not easy to form antithrombus<br/>[B].<br/>Blood vessels do not constrict easily B: Failure to maintain the integrity of vascular endothelium C: Blood clot retraction disorder D: Blood clotting disorders

From the fourth paragraph we learn that ______ A: heart attacks are more likely caused by alcohol than stroke B: moderate drinking discourages blood platelets from clotting C: boosting the levels of good cholesterol can lead to heart attacks D: moderate drinking protects people by making the blood cell clump

Inflammatory<br/>responses may include all of the following except ( ) A: Clotting<br/>proteins sealing off a localized area. B: Increased<br/>activity of phagocytes in an inflamed area. C: Reduced<br/>permeability of blood vessels to conserve plasma. D: Release<br/>of substances to increase the blood supply to an inflamed area. E: Increased<br/>release of white blood cells from bone marrow.

Where do the clots come from? Blood flow slow down. A sudden change in heart rhythm leads the upper chambers to contract abnormally. Platelets, clotting factors, and fibrin stick together. The clot can be carried up towards the arteries and blood vessels supplying the brain until getting to one it can't squeeze through. A: ①②③④ B: ②①③④ C: ②③①④ D: ①③④②

How is the embolism of a thrombotic stroke formed? ① Blood flow slows down. ② A sudden change in heart rhythm prevents the upper chambers of the heart from contracting normally. ③ Platelets, clotting factors, and fibrin stick together. ④ The clot can be carried up towards the arteries and blood vessels supplying the brain until it can’t squeeze through. A: ②④③① B: ②①③④ C: ②①④③ D: ①②④③

Which of the following is least likely to be associated with an increase in the inflammatory <br/>response? A: necrosis of cells, followed by phagocytosis of neutrophils B: release of peptides curing cleavage of fibrinogen to fibrin (blood clotting) C: cleavage of C5 during complement activation D: apoptosis of surplus healthy cells E: secretion of IFNγ by macrophages and TH cells

The main function of calcitonin is A: increase blood calcium and blood phosphorus B: decrease blood calcium and blood phosphorus C: decrease blood calcium and increase blood phosphorus D: increase blood calcium and decrease blood phosphorus E: involve in the normal calcium regulation

Directions: Please read the following sentences and choose the correct answers.A test to check your blood is called a ________.? blood type;|blood test ;|blood;trial;|;blood vessel