Herbs and the Immune System Flashcards
Explain the biological terrain theory
Biological terrain theory suggests that the physiological strength or balance of an individual can protect them from illness, while imbalance (i.e., poor terrain) can invite disease-causing microbes. This is in contrast to Pasteur’s germ theory, which argues that microbes alone are the cause of certain diseases.
Explain the ecological interpretations theory and name the four interpretations
The ecological interpretation theory states that the immune system does not exist in isolation but is a part of the environment and therefore influenced by it.
- The immune system is ecology in action
- The immune system is an interface between internal
and external environments. - The immune system is an expression of homeostasis
- The immune system is an expression of relationship
What is meant by “The Immune System is Ecology in Action”
The immune system is an expression of the relationship between the body and everything in its environment. This fluid, constantly-shifting exchange is the definition of ecology—the study of the relationship between organisms and their environment, including food, water, people, and landscape.
What is meant by “The Immune System is an Interface Between Internal and External Environments”
Like the place where forest meets meadow, the immune system is that zone between body and outside world that allows resistance and embrace at the same time
What is meant by “The Immune System is an Expression of Homeostasis”
According to James Lovelock’s Gaia hypothesis, striving toward homeostasis is not just something happening inside a human body, but in the planet, as an organism, as well. As more factors stress the planet (e.g., pollution, overpopulation, climate change), it adjusts both climate and physical environment to maintain planetary health. The inner homeostasis inside humans reflects the ecological homeostasis of the greater world (Hoffmann, 2003).
What is meant by “The Immune System is an Expression of Relationship”
the nature of the relationships we have with the world, including what we eat, our connection (or lack thereof) to nature, our feelings towards others, and so on, which can all influence the health of our immune system (Hoffmann, 2003).
Name the main parts of the Immune System?
Skin, Tears, Mucus, Saliva, and Stomach Acid, Tonsils and Adenoids, Thymus Gland, Lymphatic System, Spleen, Bone Marrow, White Blood Cells, and anti-bodies.
What is the “external” interface of the immune system?
These are the things that create a barrier to pathogens preventing them from entering the body.
Healthy skin is generally impermeable to bacteria and viruses and contains special cells—Langerhans cells—that can provide early warning signs of pathogenic invasion to the immune system. Antigens entering the nasal passage and lungs are trapped in mucus, swallowed, and exposed to stomach acid, which destroys pathogens. Tears capture and expel pathogens before they can enter the body through the eye sockets. These external defenses keep most pathogens at bay.
what are the functions of the tonsils and the adenoids?
The tonsils are located on either side of the oropharynx at the back of the mouth, where they trap bacteria and pathogens. Adenoids, which begin to shrink after about age five, perch on the roof of the nasal cavity and defend the body from incoming pathogens breathed in through the nose. Both tonsils and adenoids produce antibodies (proteins and sugars that help the immune system recognize and fight off pathogens).
What is the function of the thymus gland?
The thymus gland, which becomes smaller as we approach puberty, is located between the breastbone and the heart and is responsible for T-cell production in childhood.
what role does the lymphatic system play in the immune system.
The lymphatic system supports immunity by removing waste, dead blood cells, and pathogens from tissues. It utilizes a network that passively carries lymph fluid throughout the body using the everyday movement of the body’s skeletal and smooth muscles along with a system of valves. Lymph fluid originates from interstitial fluid, which is collected in lymph capillaries, located in the spaces between cells.
Lymph fluid moves upward through the body in one-way vessels toward the neck, passing through lymph nodes, which may swell during infection. Lymph nodes contain tissue filters and large amounts of immune cells that “clean up” the fluid, removing pathogens and other unwanted material.
What is function of the spleen?
The spleen plays a number of roles in the body. It filters blood, recycles red blood cells, and stores platelets and white blood cells. The spleen also helps the body to resist disease by removing antibody-coated bacteria that have been filtered through the lymphatic system. Half of the body’s monocytes—large white blood cells that absorb pathogens via phagocytosis (the ingestion of pathogens)—are stored in the spleen and mobilized quickly to sites of infection in the body
What is the role of bone marrow?
Bone marrow is the spongy tissue found in the core of long bones. It produces both red and white blood cells, which are critical components of the immune system.
list the different kinds of white blood cells and their respective functions
Leukocytes are categorized according to their roles in the body, and include granulocytes, lymphocytes, and monocytes.
What are anti-bodies?
Produced primarily by special B-cells called plasma cells, antibodies (also known as immunoglobulins) are Y-shaped proteins and sugars that bind to specific antigens. Once bound to an antigen, the antibody neutralizes it. Antibodies also act as “markers” for other cells in the immune system to recognize and destroy antigens.
What are Granulocytes?
Granulocytes: Granulocytes, which include neutrophils, basophils, eosinophils, and mast cells, are immune responders that reside in the tissues and respond to chemical signals caused by inflammation, pathogens, and allergens. Most granulocytes are phagocytic—they ingest and dispose of pathogens and dead or dying cellular debris. In some cases, granulocytes also release cytokines, small proteins that are secreted by immune cells and have an effect on other cells, to call more immune responders to a site of invasion. Specifically, neutrophils perform phagocytosis and release enzymes that kill pathogens directly; basophils perform phagocytosis, produce histamine (induces inflammation), and produce heparin (prevents blood clotting); eosinophils regulate other immune cell functions, are involved in the destruction of cancer cells, release enzymes that kill pathogens, and promote repair of damaged tissue; and mast cells produce histamine and heparin. The pus that accompanies some infections is a combination of phagocytic granulocytes and dead bacteria.
Name two different kinds of immunity
Innate and Acquired immunity
What is innate immunity?
Innate immunity, also called non-specific immunity, is the defense system we all are born with. Innate immunity protects against infection in a general, non-specific way, with functions that include the skin’s defense mechanisms (like sweating and flushing), cough and tearing reflexes, and the production of enzymes and acids in tears, digestive fluids, mucus, and saliva.
What is acquired immunity?
Acquired immunity, also known as adaptive immunity, is the immune function that is initiated when a pathogen enters the body for the first time. In acquired immunity, immune cells mount a response that allows the body to recognize the pathogen or antigen in the future. Upon subsequent exposures, memory cells quickly neutralize antigens, inhibiting the progression of illness.
Another form of acquired immunity is passive immunity, which occurs when antibodies are introduced to the body from an external source. Passive immunity may be naturally acquired (e.g., when a newborn receives antibodies through mother’s milk), or received by active immunization, as in vaccines, which may protect against infectious diseases (e.g., hepatitis and tetanus).
What role does inflamation play in the immune response?
Although it can cause damage in the long term, inflammation is a healthy and normal immune response that is part of the healing process. When tissue becomes infected or otherwise damaged, locally acting chemicals stimulate an increase in blood flow to the tissue, which contributes to the warmth and redness that accompany an injury. Inflammatory chemicals also signal fluids to leak into tissues from nearby blood vessels, helping to physically contain and quarantine pathogens.
Without inflammation, pathogens would spread throughout the body and wounds would not heal. Too much inflammation, however, and healthy tissue may be compromised or destroyed. Poor diet, pollution, and stress can all lead to chronic inflammation and is a contributing factor to many chronic diseases (e.g., diabetes, heart disease, dementia) (Romm, 2017).
Name 3 ways in which we can support the immune system?
Lifestyle, nutrition, herbs
How can we improve lymphatic health?
Hydration and Movement
Movement: Unlike the circulatory system, the lymphatic system does not have a pump, thus supporting lymphatic flow through movement, exercising, deep breathing exercises, manual lymph drainage, light lymphatic exercises, and skin brushing helps to maintain a healthy lymphatic and immune system
Hydrations: Staying hydrated not only supports the lymphatic system, but helps to maintain the integrity of the mucous membranes, which are one of the first lines of defense against pathogens
What is the impact of sleep on the immune system?
lack of sleep results in decline of natural killer t-cells
The immune system is affected by the circadian rhythm (the 24-hour sleep-wake cycle) in that the functioning of the immune system naturally fluctuates over the day (Irwin, 2015). For example, independent of sleep, the number of T-cells, B-cells, leukocytes, monocytes, and granulocytes peak during the late evening and then drop throughout the night. This cycle is linked to the fluctuation of cortisol in that approximately three hours after cortisol levels peak, T-cells start to drop nocturnal sleep has a major impact on the adaptive immune system. For example, the number of natural killer cells and their activity is lowest during the early part of the night and increases while asleep, peaking during the late morning (Irwin, 2015). Studies have shown that poor sleep impacts the immune system, causing a decline in natural killer cells (Irwin et al., 1996; Oztürk et al., 1999). Clearly, ensuring good quality sleep is important for a healthy immune system.
Social isolation has also been found to impact the immune system (Jaremka et al., 2013; Pressman et al., 2005). While there are many causes of social withdrawal and isolation, it has been found to be related to sleep loss (Simon & Walker, 2018). Sleep deprivation causes individuals to be less inclined to interact with others, and in turn this isolation perpetuates further loneliness—people tend not to engage with those who they perceive to be lonely (Lau & Gruen, 1992; Simon & Walker, 2018). Therefore sleep not only supports the immune system directly and indirectly, it is also important for emotional wellbeing.
what is the relationship between healthy digestion and the immune system?
A healthy gut microbiome plays an important role in protecting against pathogens and supporting the immune system to mount an appropriate response (Björkstén et al., 2001; Feeney et al., 2014; Fujimura & Lynch, 2015; Sjögren et al., 2009). A number of factors affect our microbiota including diet, antibiotics, birthing practices, and sanitation (Bloomfield et al., 2006; Penders et al., 2006; Villeneuve et al., 2017). Prebiotics play an important role in promoting beneficial bacteria and can be obtained through the diet, particularly the ingestion of oligosaccharides found in a wide range of foods including lentils, beans, chickpeas, artichokes, garlic, onions, leeks, chicory, and mushrooms (Benouis, 2017; Brown, 2018; Jayachandran et al., 2017; Johnson et al., 2013). Note that prebiotics may be contraindicated in irritable bowel syndrome (IBS) (Varjú et al., 2017). Fermented foods such as sauerkraut, kefir, and live yogurt also support a healthy gut biome (Groves, 2016).
How does stress management support the immune system?
Chronic stress weakens the immune system and leaves us vulnerable to illness. Prolonged, elevated cortisol production by the adrenal glands decreases white blood cell production (Winston & Maimes, 2007). Chronic stress causes the adrenal glands to work harder and depletes B vitamins (B3, B5, and B12) and vitamin C (Holford, 2004).
Stress also affects the digestive system and, if endured over the long term, can affect nutrient absorption (Korn, 2016). During times of stress, the sympathetic nervous system is activated causing a number of physiological changes in the body, including diverting blood away from the digestive system so that it can be used elsewhere in the body, slowing down muscular contractions in the digestive system, and reducing the secretion of digestive enzymes (Korn, 2016).
What is the relationship between omega 3 and 6 fatty acids and the immune system?
A diet rich in healthy fats, particularly omega-3 fatty acids, should also be consumed to support the immune system and reduce inflammation. Good sources include oily fish such as salmon and sardines, nuts, seeds, and flax and hemp oil (Groves, 2016). Some omega-6 fatty acids promote inflammation; however, the omega-6 fatty acid gamma-linolenic acid (GLA), found in borage oil, black currant seed, and evening primrose oil, is a precursor to anti-inflammatory prostaglandins and is beneficial (Cabrera, 2002; Erasmus, 1993).
How does anti oxidants help the immune system?
free radicals are produced by invading pathogens to protect themselves from the immune system and antioxidants help to protect the body and the immune system from the damaging effects of free radicals
How does pungeont food help the immune system?
mprove digestion, loosen mucus and clear congestion, improve the circulation, and for their antimicrobial actions.
what role does vitamins play in immune function?
Vitamin A is an antioxidant that helps prevent pathogens from entering the body by maintaining the integrity of mucous membranes (Barasi, 2003; Haas, 1992).
Carotenoids (a form of vitamin A) are potent antioxidants that help to protect the thymus gland from oxidative damage, possess antiviral properties, and help to boost the immune system (Murray et al., 2005).
Vitamin C is essential for a healthy immune system as it is antiviral, increases resistance to bacterial infections, and aids the maturation of immune cells (Hechtman, 2012; Holford, 2004; Holford & Lawson, 2015).
A deficiency in vitamin D has been linked to lowered immunity and is associated with autoimmune disease and inflammatory conditions (Cantorna & Mahon, 2004; Yin & Agrawal, 2014). Vitamin D is thought to exert a regulatory effect on the immune system and helps to modulate inflammation by inhibiting proinflammatory processes (Baeke et al., 2010; Yin & Agrawal, 2014).
Zinc is utilized by the thymus gland in the production of immune cells and is necessary for natural killer cells to function properly (Bergner, 1997). However, too much zinc can negatively affect the activity of macrophages, thus high intake during bacterial infections is not advised (Holford, 2004).