Exam 2: The Systems of the Body
Compare and contrast nonspecific and specific immune mechanisms. Provide at least two examples of each.
The immune system is a complex network of cells, tissues, and organs that work together to defend the body against harmful pathogens such as bacteria, viruses, and parasites. There are two main types of immune mechanisms: nonspecific (innate) and specific (adaptive) immunity.
Nonspecific immune mechanisms provide immediate, general protection against a wide range of pathogens. These mechanisms include physical barriers such as the skin and mucous membranes, as well as cellular and chemical defenses such as phagocytic cells (e.g. macrophages and neutrophils) and inflammatory responses. An example of nonspecific immunity is the inflammatory response to a cut or injury, which helps to prevent infection and promote healing. Another example is the production of antimicrobial proteins such as defensins, which can kill a wide range of pathogens.
Specific immune mechanisms, on the other hand, provide targeted protection against specific pathogens. This type of immunity involves the recognition of specific antigens (molecules on the surface of pathogens) by specialized cells called lymphocytes, which then mount a tailored response to eliminate the pathogen. Examples of specific immunity include the production of antibodies by B cells, which can neutralize and eliminate specific pathogens, and the activation of cytotoxic T cells, which can directly kill infected cells. Another example is the development of immunological memory, which allows the immune system to mount a faster and more effective response upon re-exposure to a previously encountered pathogen.
In summary, nonspecific immune mechanisms provide immediate, general protection against a wide range of pathogens, while specific immune mechanisms provide targeted protection against specific pathogens and can develop immunological memory. Both types of immunity work together to provide a comprehensive defense against infectious agents.
Conditions associated with diabetes include
E
Regulation of the autonomic nervous system occurs via the sympathetic nervous system and the parasympathetic nervous system.
True
The nervous system as a whole consists of the ______________ and the _______________.
Angina pectoris is most likely to occur when a clot has developed in a coronary vessel and blocks the flow of blood to the heart.
The release of steroids via the adrenal cortex is stimulated by
The adrenal cortex produces _______________ in response to stress.
The activation of the hypothalamic-pituitary-adrenocortical (HPA) axis most closely resembles the ___________ model of stress.
Antigens are proteins produced in response to stimulation by antibodies.
The peripheral nervous system consists of the _______________ and the _______________.
The gene for _______________ has been identified. This allows for at-risk individuals to be tested to ascertain whether they are carriers of this hereditary disorder characterized by chronic physical and mental deterioration due to damaged brain cells.
Some individuals are unable to produce thromboplastin and fibrin. This condition is associated with a clotting disorder called
The _______________ nervous system mobilizes the body in response to stress; the _______________ nervous system controls the activities of the visceral organs under normal conditions.
Mark has been preparing for his graduate school entrance exam for several weeks and is very nervous about how he will perform. In addition to this stress, his girlfriend Jasmine is getting concerned that Mark has not been able to perform in the bedroom lately either. Mark's sexual difficulties due to stress are likely due to the involvement of his ___________ in the stress response.
The _______________ is an important transition centre between the thoughts generated in the cerebral cortex of the brain and their impact on internal organs.
Filters
- Essay(0)
- Multiple Choice(0)
- Short Answer(0)
- True False(0)
- Matching(0)