All are direct effects of histamines and leukotrienes on capillaries exceptOa chemotaxin factorOb vasodilation:Oc allew for diapedesh (extravasation)Od. lncroase blood RowQUESTION 2In tuberculosis, these pockets of chronically infected tissue are formed when phagocytes are unsuccessful in removing a pathogen.Oa phagolysosomesOb. granulomasOe diapedésisOd. chemotaxisQUESTION 3Granuloctye phagocyte, most abundant leukocyte, raleases NETS to kiil nearty pathogensOn EnsinophilO b. BasophiaO. Dendritic celOd. Neutrophil

Hi! Thank you for the question, As per the honor code, we are allowed to answer one question at a time, so we are answering the first question as you have not mentioned which of these you are looking for. Please resubmit the question separately for the remaining parts. Introduction: The immune system comprises various white blood cells and specific types of proteins that have an essential role in the case of cellular/tissue damage. These proteins and immune cells make up the body's second and third line of defense, the first being the chemical and physical barriers. There are several ways by which chemical mediators can initiate an immune response. Some of them exhibit phagocytosis and damages the foreign substance. Few others transmit signals that bring in immune cells at the site of action. Some of the mediators compromise the invader's replication capacity or inhibit its potential to cause any damage. Correct option and explanation: Option (c), 'allow for diapedesis (extravasation),' is correct. Explanation: Diapedesis (extravasation) occurs after vasodilation. It is the process where the leukocytes are moved to the outside tissue space from the blood. For doing so, the leukocytes stick to the internal walls of the small blood vessels like venules and capillaries. From there, they move to the outside tissue spaces by diapedesis. This movement is aided by the venule's endothelial cell lining comprising a sticky receptor that becomes more adhesive under the inflammatory mediator's influence. Incorrect options and their explanations: The direct effects of histamine and leukotrienes are chemotaxis, vasodilation, and increased blood flow. Histamine is a potent vasodilator causing the opening of the blood vessel and enhances blood flow to the injured vessels. Chemotaxis is when white blood cells are recruited to the site of inflammation by these chemical mediators. Therefore, option (a), (b), and (d) are incorrect. Conclusion: Option (c) is correct as it is not the direct effect of histamine and leukotriene on the capillary.

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Anatomy and Physiology

All are deect effects of histamines and leukotrienes on capilaries except Oa chemotavis factor Ob vasodlation Oc alow for diapedesis (extravasation) Od. increase blood fow

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Question

All are direct effects of histamines and leukotrienes on capillaries except
Oa chemotaxin factor
Ob vasodilation:
Oc allew for diapedesh (extravasation)
Od. lncroase blood Row
QUESTION 2
In tuberculosis, these pockets of chronically infected tissue are formed when phagocytes are unsuccessful in removing a pathogen.
Oa phagolysosomes
Ob. granulomas
Oe diapedésis
Od. chemotaxis
QUESTION 3
Granuloctye phagocyte, most abundant leukocyte, raleases NETS to kiil nearty pathogens
On Ensinophil
O b. Basophia
O. Dendritic cel
Od. Neutrophil

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