Lab Exam 1

Question 1

Cells that contain hemoglobin and transport respiratory gases

Answer 1

Erythrocytes

Question 2

List 5 types of Leukocytes

Answer 2

1. Lymphocytes
2. Monocytes
3. Neutrophils
4. Eosinophils
5. Basophils

Question 3

Cells that directly attack antigens

Answer 3

Lymphocytes

Question 4

Cells that function in phagocytosis

Answer 4

Monocytes

Question 5

Cells that phagocytize bacteria

Answer 5

Neutrophils

Question 6

Cells that respond to helminth infections

Answer 6

Eosinophils

Question 7

Cells that release histamine causing inflammation and vasodilation

Answer 7

Basophils

Question 8

Cell fragments that function in hemostasis and coagulation

Answer 8

Thrombocytes

Question 9

Name the 3 formed elements of blood

Answer 9

Erythrocytes, Leukocytes, and Thrombocytes

Question 10

____ exit the blood and enter tissues and differentiate into macrophages.

Answer 10

Monocytes

Question 11

____ include both T cells and B cells.

Answer 11

Lymphocytes

Question 12

Name the 3 granulocytes (that contain cytoplasmic granules visible after staining)

Answer 12

Neutrophils, Eosinophils, & Basophils

Question 13

Answer 13

Basophil

Question 14

Answer 14

Eosinophil

Question 15

Answer 15

Lymphocyte

Question 16

Answer 16

Monocyte

Question 17

Answer 17

Neutrophil

Question 18

Provides a smooth outer surface of the heart

Answer 18

Epicardium

Question 19

Functions to allow the heart to contract

Answer 19

Myocardium

Question 20

Provides a smooth lining of the heart chambers and to cover the valves

Answer 20

Endocardium

Question 21

Tissue layers of blood vessels, internal to external

Answer 21

1. Tunica interna
2. Turnica media
3. Turnica externa

Question 22

Function of the venous valve

Answer 22

Prevents back flow of blood in veins

Question 23

Function of left and right auricles

Answer 23

Increase atrial volume

Question 24

Describe the Fossa ovalis

Answer 24

Fetal remnant of foramen ovale

Question 25

Describe the Ligamentum arteriosum

Answer 25

Fetal remnant of ductus arteriosus

Question 26

Function of the Chordae tendineae

Answer 26

Achors the AV valves to the papillary muscles

Question 27

Function of papillary muscles

Answer 27

Contract to pull the chordae tendineae to open the AV valves

Question 28

Function of the Trabeculae carneae

Answer 28

Part of the heart's conduction system

Question 29

Describe the Tunica interna

Answer 29

Tissue layer composed of endothelium (simple squamous)

Question 30

Describe the Tunica media

Answer 30

Tissue layer composed of smooth muscle

Question 31

Describe the Tunica externa

Answer 31

Tissue layer composed of collagen and elastic fibers

Question 32

Describe the SA node

Answer 32

Cells generate about 75 impulses per minute; sets the pace of the heart and provides the sinus rhythm that determines heart rate

Question 33

Describe the AV node

Answer 33

Myocardial cells that conduct impulses slowly from the SA node

Question 34

Describe the AV bundle

Answer 34

AKA Bundle of His; myocardial cells conduct impulses from AV node to the bundle branches

Question 35

Describe bundle branches

Answer 35

Myocardial cells that conduct impulses from AV bundle through interventricular septum to Purkinje fibers

Question 36

Describe Purkinjie fibers

Answer 36

Myocardial cells that cause the contractile cells of the ventricles to depolarize (initiate action potentials)