Anatomy Final Quiz on BB

The life span of an erythrocyte is about _________ days.

120

Which is closest to the percentage that plasma is of a centrifuged sample of whole blood?

55%

Which are characteristic of type A blood?

Has anti-B antibodies Has surface antigen A on its erythrocytes Will agglutinate with blood type B

Which leukocytes are granulocytes?

Neutrophils Eosinophils Basophils

Which term best describes the function of blood when considering the presence of leukocytes and antibodies ?

Protection

Which term best describes the function of blood when considering the presence of carbon dioxide and oxygen?

Transportation

As their name implies, the heart chambers that receive blood returning through both circulatory circuits are called

atria

As the ventricles start to contract, the first heart sound ("lubb") signifies the

closing of the AV valves

The QRS complex of a typical electrocardiogram (ECG) tracing denotes the beginning of

depolarization of the ventricles

What are the three layers of the heart wall, in order from external to internal?

epicardium, myocardium, endocardium

Usually the most numerous of the leukocytes are the

neutrophils

The "buffy" coat of the middle layer of a centrifuged blood sample is composed of

platelets and leukocytes.

Blood from the systemic circuit returns directly into which heart chamber?

right atrium

The pulmonary trunk carries blood from which heart chamber into the pulmonary circuit?

right ventricle

he cardiac muscle fibers of the ____________ act as the pacemaker, the rhythmic center that initiates the heartbeat.

sinoatrial node (SA node)

The ____________ carries blood throughout the body; the ____________ carries blood only to and from the lungs.

systemic circuit; pulmonary circuit

Regardless of the heart chamber, contraction is called ____________ and relaxation, ____________. Answer Question 9 answers

systole, diastole

Oxygenated blood returning from the lungs enters the left atrium through

the pulmonary veins

If agglutination occurs after a blood transfusion, it may indicate

the wrong blood type was used.

Blood is correctly classified as

tissue