Which are the three types of defense?

Asked by: Eloy Kunde  |  Last update: February 6, 2026
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The three types of defense, referring to the human immune system, are Physical/Chemical Barriers (like skin and mucus), the Innate Immune System (non-specific internal responses), and the Adaptive Immune System (specific, memory-based responses). These work together to stop pathogens, with barriers blocking entry, innate immunity fighting invaders generally, and adaptive immunity developing targeted, long-lasting defenses.

What are the three types of defenses?

The first line of defense: physical and chemical barriers. The second line of defense: the innate immune response. The third line of defense: the adaptive immune response.

What are the three types of defences?

In this chapter, we have divided the numerous defenses that make up this system into three categories: physical defenses, chemical defenses, and cellular defenses. However, it is important to keep in mind that these defenses do not function independently, and the categories often overlap.

What is the 1st, 2nd, and 3rd line of defense?

The human body has three primary lines of defense to fight against foreign invaders, including viruses, bacteria, and fungi. The immune system's three lines of defense include physical and chemical barriers, non-specific innate responses, and specific adaptive responses.

What are the different types of defence?

10 Types of Defense Mechanisms Commonly Used

  • Projection. Projection as a defense mechanism is when someone feels so ashamed that they're acting a certain way. ...
  • Regression. ...
  • Denial. ...
  • Rationalization. ...
  • Displacement. ...
  • Sublimation. ...
  • Intellectualization. ...
  • Repression.

NBA Defenses for Dummies

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What are the 4 types of defenses?

Most Common Legal Defense Strategies

What are the four types of defenses? The four primary defense strategies are insanity, self-defense, alibi, and constitutional violations. An insanity defense involves proof that the defendant lacked the ability to know right from wrong due to mental illness.

What are the three kinds of self-defense?

Self-defense can be broken down into three elements; the immediacy of your physical force to protect yourself, your use or threatened use of no more physical force than would have appeared necessary, and your justification in the threat or use of physical force only while the danger continues.

What is the 3 line of defense?

The third line of defense is internal audit, which provides an independent and objective evaluation of risks and controls. Its role is to assess the effectiveness of governance, risk management, and compliance practices, identify weaknesses, and confirm that corrective actions are taken.

What is the 4th line of Defence?

Fourth line of defence: External audit

As such they are seen to be independent. External auditors can also bring a wider perspective to their work and recommendations, based on their knowledge of other organisations.

What is 2nd line defense?

The Second Line of Defense refers to an organization's specialized risk management and regulatory compliance functions. Its job is to guide and oversee controls on an organization's front line operations, in order to ensure they adhere to any applicable regulations and effectively minimize risk.

What are the different types of defenses?

Types of Football Defenses

  • 4-3 front. ...
  • 3-4 front. ...
  • 3-4 eagle. ...
  • Dallas 4-3. ...
  • Flex. ...
  • Zone blitz. ...
  • In the 46, three defensive linemen line up across from the offense's center and two guards, making it impossible for those offensive players to double-team the defender opposite the center. ...
  • Over/under 4-3.

What are the general Defences in law?

When investigating a suspected crime, there is a duty to consider evidence supporting any defence and general defences should be considered in every case. The main general defences are: automatism•intoxication•mistake•insanity•duress and necessity•self-defence, the ...

What are the most common criminal defenses?

Common Legal Defenses in California Criminal Cases

  • Lack of Evidence. One of the fundamental principles of our justice system is that the prosecution must prove guilt beyond a reasonable doubt. ...
  • Self-Defense. ...
  • Unlawful Search and Seizure. ...
  • False Accusations. ...
  • Alibi Defense. ...
  • Entrapment. ...
  • Mistaken Identity. ...
  • Coerced Confessions.

What are the three types of defense in the Army?

There are three basic defensive tasks: area defense, mobile, and retrograde. Each contains elements of the others, and usually contains both static and dynamic aspects. Infantry platoons serve as the primary maneuver element, or terrain-controlling units for the Infantry company.

Is sneezing a first line of defense?

Sneezing isn't just a quirky reflex — it's your body's first line of defense against germs, pollen, dust and more.

What are the three types of active defense?

Types of Active Defense

  • Detection. Active defense relies on early detection. ...
  • Deterrence. The first line of defense against attackers in both the physical world and cyberspace is deterrence. ...
  • Attribution.

What are the 1st, 2nd, and 3rd lines of defense?

As originally conceived:

  • First line of defense: Owns and manages risks/risk owners/managers.
  • Second line of defense: Oversees risks/risk control and compliance.
  • Third line of defense: Provides independent assurance/risk assurance.

What is the AML 3 line of defense?

The Three Lines of Defense is an AML-CFT compliance framework that designates roles for frontline employees managing risks, a team overseeing compliance, and internal audit for oversight. This structure strengthens defenses against money laundering and the financing of terrorism.

What is 3rd line defence?

The third line of defence is the internal audit function. The internal audit function is responsible for providing independent assurance that the organisation's risk management framework is effective. This includes things like testing the effectiveness of risk controls and issuing audit reports.

Who created the 3 lines of defense model?

In January 2013, the Three Lines of Defence model was published by the Institute of Internal Auditors.

What are the three levels of compliance?

To decide which of the three FISMA compliance levels applies to your organization, you'll need to determine whether the potential impact to your organization would be limited, serious, or severe. NIST defines the three levels FISMA compliance levels as low impact, moderate impact, and high impact.

What are the 3 E's of risk management?

To achieve the best efficiency for the management of each risk, you need to look at the Three Es of treatment, namely: Engineer the solution in part or whole. Educate on the risk treatment solution. Enforce the application to maintain the engineering and education of the solution.

What is the strongest self-defense?

Krav Maga is considered to be the deadliest martial art for self-defense due to its comprehensive approach. Brazilian Jiu-Jitsu, Krav Maga, Muay Thai, Boxing, Jeet Kune Do and other styles are among the top 10 deadliest martial arts in the world.

What martial arts do CIA agents learn?

The CIA and Krav Maga Match

While it's not the only martial art used by the CIA, the adoption of Krav Maga reflects the agency's commitment to ensuring their operatives are equipped with the best tools and training for their high-stakes work.

How many types of defenses are there?

The criminal justice system provides a number of different defenses to those who are accused of crimes. These defenses include innocence, alibi, self-defense, insanity, duress, entrapment, statute of limitations and constitutional rights.