Blood and Heart Quiz
Approximately how long is the life span of a typical red blood cell?
120 days
Erythrocytes make up _________ of whole blood.
44%
Plasma makes up __________ of whole blood.
55%
The two smaller, superior chambers that receive blood into the heart are called the
Atria
Which type of leukocyte releases histamine and heparin?
Basophil
Normally the least abundant of the white blood cells
Basophils
A heart rate below 60 beats per minute is called
Bradycardia
What is the term used to represent the amount of blood pumped out of the heart per minute?
Cardiac output
Systole refers to
Contraction
The QRS wave of an EKG shows..
Depolarization of the ventricles
________________ is when various heart cells are contracting at different times. Instead of "pumping", the chamber is "twitching/quivering".
Fibrillation
How many oxygens can a single hemoglobin molecule carry at one time?
Four
Which leukocyte is involved with "adaptive immunity", where the immune system learns how to fight an infection. These cells are "trained" by either natural exposure or vaccination?
Leukocytes
Which two substances make up the "buffy coat" layer of blood?
Leukocytes and platelets
What is the trigger for the hormone Erythropoietin (EPO)?
Low levels of oxygen in the blood
The right side of the heart pumps blood to the
Lungs
Small agranulocytes that have relatively large, round nuclei with thin rims of cytoplasm
Lymphocytes
Which of the following leukocytes is "agranular?"
Monocyte
The largest type of white blood cells
Monocytes
Polymorphonuclear leukocyte is another name for a ______ with a segmented nucleus.
Neutrophil
The most common leukocyte is the ___________, while the least common is the ________.
Neutrophil ; Basophil
A mature red blood cell can not reproduce because it lacks the ______ that was extruded during late development.
Nucleus
Serum is....
Plasma with the clotting factors removed
Small cell fragments the function to prevent blood loss from an injury site are called
Platelets
A blood clot can detach from its original place of formation, then travel to the lungs and clog up the capillaries. This is called
Pulmonary Embolism
Which blood cell has no nucleus or organelles, is biconcave in shape, and transports oxygen?
Red blood cell
The ____________ is/are located in the roof of the right atrium. It is commonly called the "pacemaker" region because it initiates the heartbeat.
SA Node
Which of the following is the correct order of electrical flow in the heart?
SA Node - AV Node - Bundle of His - Purkinje fibers
When heart rate exceeds 100 beats per minute, it is called
Tachycardia
Which part of a red blood cell binds to oxygen?
The heme group of the hemoglobin
What does a hematocrit measure?
The percentage of formed elements
White blood cells lacking a granular cytoplasm are called
agranulocytes
The shape of a red blood cell can be described as
biconcave
White blood cells whose cytoplasmic granules stain red in acid are called
eosinophils
Mature red blood cells are also called
erythrocytes
White blood cells with granular cytoplasms are called
granulocytes
The oxygen-carrying substance in a red blood cell
hemoglobin
White blood cells are also known as
leukocytes
Normally, the most numerous white blood cells are
neutrophils
The functions of red blood cells are
transport oxygen and carbon dioxide
