Concept explainers
To explain: The role of normal defenses in preventing disease.
Concept introduction: Organisms use defense mechanisms to protect from any injurious agent. This can be specific or non-specific.

Explanation of Solution
The defense mechanisms are generally classified into three lines of defense as follows:
- First line of defense
- Second line of defense
- Third line of defense
First line of defense: It is the general, non-specific defense mechanism that includes the mechanical barrier such as skin or mucous membrane. This prevents the entry of bacteria or other harmful particles inside the tissues. Certain body secretions such as saliva or tears act as mechanical barriers. It contains enzymes or chemical substances that inactivate the potential invading particles.
Second line of defense: It is the non-specific defense mechanism that includes the process of phagocytosis and inflammation. Phagocytosis is the process in which macrophages and neutrophils engulf the invading foreign particles, cell debris, or bacteria and destroy them. Inflammation is the sequence of events that limit the effects of injury or any agent in the body. For example, interferons, which protect the healthy tissues from viruses.
Third line of defense: It is the specific defense mechanism that protects the body by stimulating the specific antibodies or lymphocytes against the invading organisms. It creates an immune response against the harmful substances to protect the body.
Pictorial representation:
Fig.1 represents the defense mechanisms of the body.
Fig. 1: Three lines of defense mechanisms in the body.
Want to see more full solutions like this?
Chapter 5 Solutions
EBK GOULD'S PATHOPHYSIOLOGY FOR THE HEA
- How are the nervous and musculoskeletal systems interrelated? How do central nervous system abnormalities and damage to the musculoskeletal system affect mobility? Please cite in text source and list referencesarrow_forwardMake a nursing care plan Nursing Diagnosis: Acute pain related to post operative surgery as evidenced by guarding and facial grimace Chief Complaints: Hypogastric pain history of present illness2 months prior to consultation the patient complained of abdominal pain associated with discomfort, she was admitted to the ER but was discharged with unrecalled medications. 1 month prior to consultation the patient had moderate to severe dysmenorrhea, a whole abdominal ultrasound was performed and the results indicated the patient to have myoma in her uterus. 2 weeks prior to admission the attending physician was consulted due to the results of the whole abdominal ultrasound hence her admission for a total abdominal hysterectomy bilateral salpingo-oophorectomy. past health history Patient underwent a total thyroidectomy Diagnosis: Myoma Uterine Subjective CuesObective cuesScientific AnalysisSituational AnalysisGoals and ObjectiveShort Term GoalCognitive GoalsAffective…arrow_forwardMake a justification according to ABC or Maslows based on the problem prioritizationChief Complaints: Hypogastric pain history of present illness 2 months prior to consultation the patient complained of abdominal pain associated with discomfort, she was admitted to the ER but was discharged with unrecalled medications. 1 month prior to consultation the patient had moderate to severe dysmenorrhea, a whole abdominal ultrasound was performed and the results indicated the patient to have myoma in her uterus. 2 weeks prior to admission the attending physician was consulted due to the results of the whole abdominal ultrasound hence her admission for a total abdominal hysterectomy bilateral salpingo-oophorectomy. past health history Patient underwent a total thyroidectomy Diagnosis: Myoma Uterine1 Acute pain related to post operative surgery as evidenced by guarding and facial grimace2 Impaired Physical Mobility as evidenced by post operative surgery and limited ability to perform activities…arrow_forward
- What are the economic consequences of pressure ulcers? Please cite in text source and list referencesarrow_forwardDiscuss/provide a handout for artificial sweeteners (background information, safety, etc). Please include the following sweeteners to compare to (table sugar, honey, agave nectar).arrow_forwardDiscuss/compare the amount of saturated fat in 3-4 oz/a serving of 80%. 85%. 90% and 98% ground beef and turkey. Also, how much saturated fat in a serving of bacon vs turkey bacon and Canadian bacon.arrow_forward
- LABEL THE WAVES BELOW (don't explain just place the letter where it's supposed to go)arrow_forwardMake a nursing care plan Acute pain related to post operative surgery as evidenced by guarding and facial grimace Subjective Cues Objective cues Scientific Analysis Situational Analysis Goals and Objective Short term Goal Cognitive Goal Affective Goal Psychomotor Goal Implementation Independent nursing interventions Dependent Nursing Intevention Collaborative Nursing Intervention Rationale Evaluation Chief Complaints: Hypogastric pain history of present illness2 months prior to consultation the patient complained of abdominal pain associated with discomfort, she was admitted to the ER but was discharged with unrecalled medications. 1 month prior to consultation the patient had moderate to severe dysmenorrhea, a whole abdominal ultrasound was performed and the results indicated the patient to have myoma in her uterus. 2 weeks prior to admission the attending physician was consulted due to the results of the whole abdominal ultrasound hence her admission for a total abdominal…arrow_forward10 different types of cheeses (most popular chees; comparing them in calories, serving size and Sat. Fat). What are it's benefits of cheese as a diabetic and how cheese can affect a diabetiesarrow_forward
- describe 3 challenges a healthcare leader may face in a healthcare organization ( negative employee morale, poor customer service, and outdated equipment.arrow_forwardLabel the wavesarrow_forwardPRACTICE STRIPS PART I: LABELING WAVES Directions: For each of the following rhythm strips, label the P, Q, R, S, and T waves of a single cardiac cycle. (Some of the tracings may not have all of these waves.) As you finish each strip, check your answers. They start on page 45. 2.1 2.2 2.3 2.4 2.5 2.6 груди порогомоarrow_forward
- Phlebotomy EssentialsNursingISBN:9781451194524Author:Ruth McCall, Cathee M. Tankersley MT(ASCP)Publisher:JONES+BARTLETT PUBLISHERS, INC.Gould's Pathophysiology for the Health Profession...NursingISBN:9780323414425Author:Robert J Hubert BSPublisher:SaundersFundamentals Of NursingNursingISBN:9781496362179Author:Taylor, Carol (carol R.), LYNN, Pamela (pamela Barbara), Bartlett, Jennifer L.Publisher:Wolters Kluwer,
- Fundamentals of Nursing, 9eNursingISBN:9780323327404Author:Patricia A. Potter RN MSN PhD FAAN, Anne Griffin Perry RN EdD FAAN, Patricia Stockert RN BSN MS PhD, Amy Hall RN BSN MS PhD CNEPublisher:Elsevier ScienceStudy Guide for Gould's Pathophysiology for the H...NursingISBN:9780323414142Author:Hubert BS, Robert J; VanMeter PhD, Karin C.Publisher:SaundersIssues and Ethics in the Helping Professions (Min...NursingISBN:9781337406291Author:Gerald Corey, Marianne Schneider Corey, Cindy CoreyPublisher:Cengage Learning





