The document discusses human blood groups and their classification. There are four main blood groups based on the presence or absence of antigens on red blood cells - A, B, AB, and O. The ABO and Rh blood group systems are most important for blood transfusions due to their ability to cause transfusion reactions. Blood group O is the universal donor as it lacks antigens, while blood group AB is the universal receiver as it lacks antibodies. Rh incompatibility during pregnancy can cause a serious disorder in the fetus called erythroblastosis fetalis if the mother is Rh- and fetus is Rh+. Proper blood group matching is crucial to avoid transfusion reactions from incompatible blood groups.
• A blood group also called a Blood Type.
• Classification of blood is based on the presence or absence
of inherited antigenic substances on the surface of red blood
cells (RBCs).
• These antigens may be proteins, carbohydrates,
glycoproteins, or glycolipids, depending on the blood group
system.
• A blood group also called a Blood Type.
• Classification of blood is based on the presence or absence
of inherited antigenic substances on the surface of red blood
cells (RBCs).
• These antigens may be proteins, carbohydrates,
glycoproteins, or glycolipids, depending on the blood group
system.
A blood type (also called a blood group) is a classification of blood based on the presence or absence of inherited antigenic substances on the surface of red blood cells (RBCs). These antigens may be proteins, carbohydrates, glycoproteins, or glycolipids, depending on the blood group system.
A blood group also called a Blood Type
Classification of blood is based on the presence or absence of inherited antigenic substances on the surface of red blood cells (RBCs)
These antigens may be proteins, carbohydrates, glycoproteins, or glycolipids, depending on the blood group system.
The ABO blood group system is the most important blood type system (or blood group system) in human blood transfusion.
ABO blood types are also present in some other animals for example rodents and apes such as chimpanzees, bonobos and gorillas.
ABO blood group system was decover by Karal landsteine
which contain A, B, and o antigen on the surface of BC, WBC,s platatelet and other body tissue cells except brain cell, and anti A, antiB and Anti Ab natural occuring antibodies in plasma of B,A, and O blood group individual respectively
A blood type (also called a blood group) is a classification of blood based on the presence or absence of inherited antigenic substances on the surface of red blood cells (RBCs). These antigens may be proteins, carbohydrates, glycoproteins, or glycolipids, depending on the blood group system.
A blood group also called a Blood Type
Classification of blood is based on the presence or absence of inherited antigenic substances on the surface of red blood cells (RBCs)
These antigens may be proteins, carbohydrates, glycoproteins, or glycolipids, depending on the blood group system.
The ABO blood group system is the most important blood type system (or blood group system) in human blood transfusion.
ABO blood types are also present in some other animals for example rodents and apes such as chimpanzees, bonobos and gorillas.
ABO blood group system was decover by Karal landsteine
which contain A, B, and o antigen on the surface of BC, WBC,s platatelet and other body tissue cells except brain cell, and anti A, antiB and Anti Ab natural occuring antibodies in plasma of B,A, and O blood group individual respectively
BLOOD GROUPING AND CROSS MATCHING.
overview of blood grouping
History
classification of blood typing
ABO SYTEM
INTRODUCTION ON ABO SYSTEM AND KARL LANSTIENER
LANSTEINER'S LAW
PRESENCE AND ABSENCE OF ANTIGEN AND ANTIBODIES
RH SYSTEM INCLUDING RH ANTIGEN AND POITIVE AND NEGATIVE BLOOD GROUPS
BLOOD GROUP COMPATABILITY
EXPLANATION ON CROSS MATCHING
TYPES OF CROSS MATCHING INCLUDING MAJOR AND MINOR
NOTE ON UNIVERSAL DONOR AND RECIPIENT
AGGLUTINATION
If a doctor talks about your blood type, usually he or she is referring to two things: your type in the ABO system and Rhesus (Rh) factor. Human blood type is determined by antigens on the red blood cells. An antigen is a structure on the cell surface that causes a human immune response reacts to if the structure is foreign to the person’s body. Consequently, blood type match is of crucial importance. The donor’s blood type is identified at the Blood Centre, and the patient’s blood type is determined before transfusion. Here is everything you need to know!
These lecture slides, by Dr Sidra Arshad, offer a quick overview of physiological basis of a normal electrocardiogram.
Learning objectives:
1. Define an electrocardiogram (ECG) and electrocardiography
2. Describe how dipoles generated by the heart produce the waveforms of the ECG
3. Describe the components of a normal electrocardiogram of a typical bipolar leads (limb II)
4. Differentiate between intervals and segments
5. Enlist some common indications for obtaining an ECG
Study Resources:
1. Chapter 11, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 9, Human Physiology - From Cells to Systems, Lauralee Sherwood, 9th edition
3. Chapter 29, Ganong’s Review of Medical Physiology, 26th edition
4. Electrocardiogram, StatPearls - https://www.ncbi.nlm.nih.gov/books/NBK549803/
5. ECG in Medical Practice by ABM Abdullah, 4th edition
6. ECG Basics, http://www.nataliescasebook.com/tag/e-c-g-basics
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micro teaching on communication m.sc nursing.pdfAnurag Sharma
Microteaching is a unique model of practice teaching. It is a viable instrument for the. desired change in the teaching behavior or the behavior potential which, in specified types of real. classroom situations, tends to facilitate the achievement of specified types of objectives.
Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
MANAGEMENT OF ATRIOVENTRICULAR CONDUCTION BLOCK.pdfJim Jacob Roy
Cardiac conduction defects can occur due to various causes.
Atrioventricular conduction blocks ( AV blocks ) are classified into 3 types.
This document describes the acute management of AV block.
2. •The differences in human blood are due to the
presence or absence of certain protein molecules
called antigens and antibodies.
•The antigens are located on the surface of the
RBCs and the antibodies are in the blood
plasma.
•Individuals have different types and
combinations of these molecules.
•The blood group you belong to depends on what
you have inherited from your parents.
What are the different blood groups?
3. • There are more than 20 genetically determined
blood group systems known today
•Eg. ABO System,Rh-System MNS System, Kell
System, Lewis System
• The AB0 and Rhesus (Rh) systems are the
most important ones used for blood transfusions.
• Not all blood groups are compatible with each
other. Mixing incompatible blood groups leads to
blood clumping or agglutination, which is
dangerous for individuals.
What are the different blood groups?
4. Classification Of Blood Groups.
Major Blood Grouping System:
1-ABO blood group system
2-Rh blood group system
because they cause major transfusion reaction.
Minor Blood Grouping System:
1-MNS blood group system
2-p blood group system
because they cause minor transfusion reaction.
Familial Blood Grouping System:
Kell, Daffy, Lutheran, Lewis, Deigo, and Many
more.
5. According to the ABO blood
typing system there are four
different kinds of blood types:
A, B, AB or O (null).
ABO blood grouping system
6. Landsteiner Law
• It was given by Karl Landsteiner in
1900.
• It states that ; If an agglutinogen is
present on the RBC of an individual,
the corresponding agglutinin must be
absent in the plasma of that
individual and vice-versa.
• This law is only applicable to ABO
blood grouping system.
7.
8. Blood group A
If you belong to the blood
group A, you have A
antigens on the surface of
your RBCs and B
antibodies in your blood
plasma.
Blood group B
If you belong to the blood
group B, you have B
antigens on the surface of
your RBCs and A
antibodies in your blood
plasma.
AB0 blood grouping system
9. Blood group AB
If you belong to the blood group
AB, you have both A and B
antigens on the surface of your
RBCs and no A or B antibodies
at all in your blood plasma.
Blood group O
If you belong to the blood group O
(null), you have neither A or B
antigens on the surface of your RBCs
but you have both A and B antibodies
in your blood plasma.
10. Blood
Group
Antigens Antibodies Can give
blood to
Can
receive
blood from
AB A and B None AB AB, A, B, O
A A B A and AB A and O
B B A B and AB B and O
O None A and B AB, A, B, O O
11. Blood group O is called
"universal donor"
because it has no antigens
on RBC.
Blood group AB are called
"universal receivers“
because it has no anti-
bodies in the plasma.
13. Landsteiner and Weiner in 1940 discovered other
antigens in human R.B.Cs and named rhesus antigens
or Rh-antigen because the same antigens are present in
monkey.
One of the basic difference between ABO and Rh
systems is that the Rh antibodies are not natural i.e.
they are not present at birth but are synthesised in Rh
negative persons in response to the presence of
Rh+antigen.
The Rhesus (Rh) System (Cont.)
14. The Rhesus (Rh) System (Cont.)
•Rh antigens are transmembrane proteins with
loops exposed at the surface of red blood cells.
• They appear to be used for the transport of
carbon dioxide and/or ammonia across the
plasma membrane.
• 85% of the population is RhD positive, the
other 15% of the population is running around
with RhD negative blood.
15. • A person with Rh- blood develop Rh antibodies in the
blood plasma if he or she receives blood from a
person with Rh+ blood. If such a person is given Rh+
blood, its anti-Rh antibodies react with the donor’s Rh
antigens and aggulate the blood.
•A person with Rh+ blood can receive blood from a
person with Rh- blood without any problems.
16. Why is an Rh incompatibility so dangerous
when ABO incompatibility is not during
pregnancy?
Incompatibility is seen between Rh- woman and her foetus. Rh-
woman when married to Rh+ man bears Rh+ foetus. Although
the foetal and maternal blood do not come in direct contact due
to placental barrier, some foetal R.B.C’s manage to enter the
maternal blood stream. The Rh antigen on their surface induces
formation of anti-Rh antibodies. These antibodies then cross the
placenta and enter the foetus blood circulation and cause a
blood disorder known as erythroblastosis foetalis. The
reaction of Rh-woman against her Rh+offspring becomes
progressively more severe with each subsequent pregnancy.
17. Mis-Matched Blood Transfusion
•The individuals of different blood groups are perfectly normal but
the incompatibility is expressed during blood transfusion.
•The antibodies of recipients blood reacts against the antigens of
donor’s blood and cause the clumping of R.B.Cs known as
agglutination.
•The agglutination can cause serious consequences and may
prove fatal.
•That is why doctor make careful tests to determine what blood
must safely be used in transfusion.
•The anti- bodies in the plasma must not combine with the
antigens on the surface of the red blood cells, or else
agglutination occurs.