Blood Classification and Composition
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Questions and Answers

In terms of its tissue classification, blood is classified as a _________________________

connective tissue

Blood has living blood cells called ______________

formed elements

These blood cells are suspended in a nonliving fluid matrix called

plasma

The fibers of blood only become visible during

<p>clotting</p> Signup and view all the answers

Most of the compacted cell mass is composed of

<p>erythrocytes</p> Signup and view all the answers

The volume of the blood accounted for by these cells is referred to as the

<p>hematocrit</p> Signup and view all the answers

The less dense ______ rises to the top and constitutes about 45% of the blood volume

<p>plasma</p> Signup and view all the answers

The so-called 'buffy coat', composed of ___________ and __________, is found at the junction between the other two blood elements

<p>leukocytes, platelets</p> Signup and view all the answers

The buffy coat accounts for less than ______ of blood volume

<p>1%</p> Signup and view all the answers

Blood is scarlet red in color when it is loaded with __________, otherwise it tends to be dark red

<p>oxygen</p> Signup and view all the answers

Most numerous leukocyte

<p>neutrophil</p> Signup and view all the answers

Granular leukocytes

<p>neutrophil, eosinophil, basophil</p> Signup and view all the answers

Also called an erythrocyte, anucleate

<p>red blood cell</p> Signup and view all the answers

Actively phagocytic leukocytes

<p>neutrophil, monocyte</p> Signup and view all the answers

Agranular leukocytes

<p>monocyte, lymphocyte</p> Signup and view all the answers

Fragments to form platelets

<p>megakaryocyte</p> Signup and view all the answers

Examples of formed elements

<p>red blood cell, megakaryocyte, eosinophil, basophil, monocyte, neutrophil, lymphocyte</p> Signup and view all the answers

Increases during allergy attacks

<p>eosinophil</p> Signup and view all the answers

Releases histamine during inflammatory reactions

<p>basophil</p> Signup and view all the answers

After originating in bone marrow, may be formed in lymphoid tissue

<p>lymphocyte</p> Signup and view all the answers

Contains hemoglobin

<p>red blood cell</p> Signup and view all the answers

Primarily water, noncellular; the fluid matrix of blood

<p>plasma</p> Signup and view all the answers

Increases in number during prolonged infections

<p>monocyte</p> Signup and view all the answers

Least numerous leukocyte

<p>basophil</p> Signup and view all the answers

Also called white blood cells

<p>eosinophil, basophil, monocyte, neutrophil, lymphocyte</p> Signup and view all the answers

What is the stimulus for making more RBC?

<p>oxygen</p> Signup and view all the answers

White blood cells move into and out of blood vessels by the process of...

<p>diapedesis</p> Signup and view all the answers

An abnormal decrease in the number of WBCs is...

<p>leukopenia</p> Signup and view all the answers

A normal pH range of blood is _____

<p>7.35 to 7.45</p> Signup and view all the answers

The cardiovascular system in an average adult contains approximately _______ liters of blood

<p>5.5 liters</p> Signup and view all the answers

Anemia resulting from a decreased RBC number causes the blood to become _______ viscous

<p>less</p> Signup and view all the answers

Rank the following lymphocytes from most abundant to least abundant

<p>Neutrophil, Lymphocyte, Monocyte, Eosinophil, Basophil</p> Signup and view all the answers

Study Notes

Blood Classification and Composition

  • Blood is classified as connective tissue, consisting of living cells and a nonliving matrix.
  • Living blood cells are known as formed elements, suspended within a fluid matrix called plasma.
  • The solid components of blood primarily contain erythrocytes, which make up the majority of the cell mass.
  • Plasma constitutes about 55% of blood volume and is the less dense component that rises to the top.

Blood Components

  • The hematocrit is the term for the volume percentage of red blood cells in blood.
  • The "buffy coat" is a thin layer between erythrocytes and plasma, consisting of leukocytes and platelets, accounting for less than 1% of total blood volume.
  • Blood is bright scarlet red when oxygenated and dark red when deoxygenated.

White Blood Cells

  • Neutrophils are the most numerous type of leukocyte and are actively phagocytic.
  • Granular leukocytes include neutrophils, eosinophils, and basophils, while agranular leukocytes consist of monocytes and lymphocytes.
  • Eosinophils increase during allergy attacks, whereas basophils release histamine during inflammatory responses.
  • Monocytes are elevated during prolonged infections.

Red Blood Cells

  • Red blood cells (RBCs), or erythrocytes, lack nuclei and are crucial for transporting oxygen due to their hemoglobin content.
  • The stimulus for increased red blood cell production is low oxygen levels in the blood.
  • Blood viscosity decreases when there is a reduction in red blood cell count.

Blood Cell Regulation and pH

  • Diapedesis is the process by which white blood cells exit blood vessels to perform immune functions.
  • Leukopenia refers to an abnormal decrease in the number of white blood cells.
  • Normal blood pH ranges from 7.35 to 7.45, maintaining acid-base homeostasis.

Blood Volume

  • The average adult cardiovascular system contains approximately 5.5 liters of blood, vital for bodily functions.

Lymphocyte Abundance

  • The order of abundance for lymphocyte types is: Neutrophil, Lymphocyte, Monocyte, Eosinophil, Basophil.

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Description

This quiz covers the classification and composition of blood as a connective tissue, its cellular components, and the role of different types of blood cells. You will explore topics such as erythrocytes, plasma, and the functions of leukocytes. Test your knowledge on how blood is structured and its various functions in the body.

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