The extrinsic pathway of blood clotting _______________. A- It is activated by t

Question

The extrinsic pathway of blood clotting _______________.

A- It is activated by tissue factor

B- It produces prothrombinase

C- It inhibits coagulation

D- A and b

E- B and c

Which of the following clotting factors is involved in strengthening and stabilizing a blood clot?

A- Factor XIV

B- Factor V

C-Factor VII

D- Factor XIII

E- Factor XI

Blood leaving the left ventricle passes through which of the following structures?

A- Right atrium

B- Bicuspid valve

C- Aortic semilunar valve

D- Pulmonary semilunar valve

In which period during a cardiac cycle contraction of a chamber occurs and pressure within the chamber rises?

A- filling

B- systole

C- repolarization

D-diastole

E- fibrillation

Which of the following chambers of the heart is surrounded by the thickest layer of myocardium?

A- right atrium

B- left atrium

C- right ventricle

D- left ventricle

Which structure in the heart initiates action potentials that stimulate contraction of the heart at a constant rate ?

A- Cardiac accelerator nerves

B- Atrioventricular node

C- Cardiovascular center

D- Sinoatrial node

E- Bundle of His

Which layer of the heart wall consists of cardiac muscle tissue?

A- Epicardium

B- Pericardium

C- Myocardium

D- Endocardium

Explanation / Answer

The extrinsic pathway of blood clotting _______________.

D. a and b

Which of the following clotting factors is involved in strengthening and stabilizing a blood clot

D. Factor XIII

Blood leaving the left ventricle passes through which of the following structures

C. aortic semilumar valve

In which period during a cardiac cycle contraction of a chamber occurs and pressure within the chamber rises

B. systole

Which of the following chambers of the heart is surrounded by the thickest layer of myocardium

D. left ventricle

Which structure in the heart initiates action potentials that stimulate contraction of the heart at a constant rate

D. sinoatrial node

Which layer of the heart wall consists of cardiac muscle tissue

C. Myocardium

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