Cilia and Flagella are complex filamentous cytoplasmic structures protruding through a cell wall.
They are minute, especially differentiated appendices of the cell.
Flagella wriggle like eels. They generate waves that pass along their length, usually from base to tip at constant amplitude.
Thus the movement of water by a flagellum is parallel to its axis while a cilium moves water perpendicular to its axis and, hence, perpendicular to the surface of the cell. The axoneme is connected with the basal body which is an intracellular granule lying in the cell cortex and which originates from the centrioles.
Each axoneme is filled with ciliary matrix, in which are embedded two central singlet microtubules, each with the 13 protofilaments and nine outer pairs of microtubules, called doublets. This recurring motif is known as the 9 + 2 array.
Motor molecules also carry vesicles or organelles to various destinations along “monorails’ provided by the cytoskeleton.
Interactions of motor proteins and the cytoskeleton circulates materials within a cell via streaming.
Recently, evidence is accumulating that the cytoskeleton may transmit mechanical signals that re-arrange the nucleoli and other structures.
Motor molecules also carry vesicles or organelles to various destinations along “monorails’ provided by the cytoskeleton.
Interactions of motor proteins and the cytoskeleton circulates materials within a cell via streaming.
Recently, evidence is accumulating that the cytoskeleton may transmit mechanical signals that re-arrange the nucleoli and other structures.
cell organelles, nucleus, mitochondria, plasma memebrane,ribosomes, golgi bodies, lysosomes, chloroplast
(helpfull for B.Sc. students as well as competitions tests
Explore natural remedies for syphilis treatment in Singapore. Discover alternative therapies, herbal remedies, and lifestyle changes that may complement conventional treatments. Learn about holistic approaches to managing syphilis symptoms and supporting overall health.
cell organelles, nucleus, mitochondria, plasma memebrane,ribosomes, golgi bodies, lysosomes, chloroplast
(helpfull for B.Sc. students as well as competitions tests
Explore natural remedies for syphilis treatment in Singapore. Discover alternative therapies, herbal remedies, and lifestyle changes that may complement conventional treatments. Learn about holistic approaches to managing syphilis symptoms and supporting overall health.
Pulmonary Thromboembolism - etilogy, types, medical- Surgical and nursing man...VarunMahajani
Disruption of blood supply to lung alveoli due to blockage of one or more pulmonary blood vessels is called as Pulmonary thromboembolism. In this presentation we will discuss its causes, types and its management in depth.
The prostate is an exocrine gland of the male mammalian reproductive system
It is a walnut-sized gland that forms part of the male reproductive system and is located in front of the rectum and just below the urinary bladder
Function is to store and secrete a clear, slightly alkaline fluid that constitutes 10-30% of the volume of the seminal fluid that along with the spermatozoa, constitutes semen
A healthy human prostate measures (4cm-vertical, by 3cm-horizontal, 2cm ant-post ).
It surrounds the urethra just below the urinary bladder. It has anterior, median, posterior and two lateral lobes
It’s work is regulated by androgens which are responsible for male sex characteristics
Generalised disease of the prostate due to hormonal derangement which leads to non malignant enlargement of the gland (increase in the number of epithelial cells and stromal tissue)to cause compression of the urethra leading to symptoms (LUTS
NVBDCP.pptx Nation vector borne disease control programSapna Thakur
NVBDCP was launched in 2003-2004 . Vector-Borne Disease: Disease that results from an infection transmitted to humans and other animals by blood-feeding arthropods, such as mosquitoes, ticks, and fleas. Examples of vector-borne diseases include Dengue fever, West Nile Virus, Lyme disease, and malaria.
263778731218 Abortion Clinic /Pills In Harare ,sisternakatoto
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Ozempic: Preoperative Management of Patients on GLP-1 Receptor Agonists Saeid Safari
Preoperative Management of Patients on GLP-1 Receptor Agonists like Ozempic and Semiglutide
ASA GUIDELINE
NYSORA Guideline
2 Case Reports of Gastric Ultrasound
New Directions in Targeted Therapeutic Approaches for Older Adults With Mantl...i3 Health
i3 Health is pleased to make the speaker slides from this activity available for use as a non-accredited self-study or teaching resource.
This slide deck presented by Dr. Kami Maddocks, Professor-Clinical in the Division of Hematology and
Associate Division Director for Ambulatory Operations
The Ohio State University Comprehensive Cancer Center, will provide insight into new directions in targeted therapeutic approaches for older adults with mantle cell lymphoma.
STATEMENT OF NEED
Mantle cell lymphoma (MCL) is a rare, aggressive B-cell non-Hodgkin lymphoma (NHL) accounting for 5% to 7% of all lymphomas. Its prognosis ranges from indolent disease that does not require treatment for years to very aggressive disease, which is associated with poor survival (Silkenstedt et al, 2021). Typically, MCL is diagnosed at advanced stage and in older patients who cannot tolerate intensive therapy (NCCN, 2022). Although recent advances have slightly increased remission rates, recurrence and relapse remain very common, leading to a median overall survival between 3 and 6 years (LLS, 2021). Though there are several effective options, progress is still needed towards establishing an accepted frontline approach for MCL (Castellino et al, 2022). Treatment selection and management of MCL are complicated by the heterogeneity of prognosis, advanced age and comorbidities of patients, and lack of an established standard approach for treatment, making it vital that clinicians be familiar with the latest research and advances in this area. In this activity chaired by Michael Wang, MD, Professor in the Department of Lymphoma & Myeloma at MD Anderson Cancer Center, expert faculty will discuss prognostic factors informing treatment, the promising results of recent trials in new therapeutic approaches, and the implications of treatment resistance in therapeutic selection for MCL.
Target Audience
Hematology/oncology fellows, attending faculty, and other health care professionals involved in the treatment of patients with mantle cell lymphoma (MCL).
Learning Objectives
1.) Identify clinical and biological prognostic factors that can guide treatment decision making for older adults with MCL
2.) Evaluate emerging data on targeted therapeutic approaches for treatment-naive and relapsed/refractory MCL and their applicability to older adults
3.) Assess mechanisms of resistance to targeted therapies for MCL and their implications for treatment selection
- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
- Video recording of this lecture in Arabic language: https://youtu.be/Ve4P0COk9OI
- Link to download the book free: https://nephrotube.blogspot.com/p/nephrotube-nephrology-books.html
- Link to NephroTube website: www.NephroTube.com
- Link to NephroTube social media accounts: https://nephrotube.blogspot.com/p/join-nephrotube-on-social-media.html
Lung Cancer: Artificial Intelligence, Synergetics, Complex System Analysis, S...Oleg Kshivets
RESULTS: Overall life span (LS) was 2252.1±1742.5 days and cumulative 5-year survival (5YS) reached 73.2%, 10 years – 64.8%, 20 years – 42.5%. 513 LCP lived more than 5 years (LS=3124.6±1525.6 days), 148 LCP – more than 10 years (LS=5054.4±1504.1 days).199 LCP died because of LC (LS=562.7±374.5 days). 5YS of LCP after bi/lobectomies was significantly superior in comparison with LCP after pneumonectomies (78.1% vs.63.7%, P=0.00001 by log-rank test). AT significantly improved 5YS (66.3% vs. 34.8%) (P=0.00000 by log-rank test) only for LCP with N1-2. Cox modeling displayed that 5YS of LCP significantly depended on: phase transition (PT) early-invasive LC in terms of synergetics, PT N0—N12, cell ratio factors (ratio between cancer cells- CC and blood cells subpopulations), G1-3, histology, glucose, AT, blood cell circuit, prothrombin index, heparin tolerance, recalcification time (P=0.000-0.038). Neural networks, genetic algorithm selection and bootstrap simulation revealed relationships between 5YS and PT early-invasive LC (rank=1), PT N0—N12 (rank=2), thrombocytes/CC (3), erythrocytes/CC (4), eosinophils/CC (5), healthy cells/CC (6), lymphocytes/CC (7), segmented neutrophils/CC (8), stick neutrophils/CC (9), monocytes/CC (10); leucocytes/CC (11). Correct prediction of 5YS was 100% by neural networks computing (area under ROC curve=1.0; error=0.0).
CONCLUSIONS: 5YS of LCP after radical procedures significantly depended on: 1) PT early-invasive cancer; 2) PT N0--N12; 3) cell ratio factors; 4) blood cell circuit; 5) biochemical factors; 6) hemostasis system; 7) AT; 8) LC characteristics; 9) LC cell dynamics; 10) surgery type: lobectomy/pneumonectomy; 11) anthropometric data. Optimal diagnosis and treatment strategies for LC are: 1) screening and early detection of LC; 2) availability of experienced thoracic surgeons because of complexity of radical procedures; 3) aggressive en block surgery and adequate lymph node dissection for completeness; 4) precise prediction; 5) adjuvant chemoimmunoradiotherapy for LCP with unfavorable prognosis.
Acute scrotum is a general term referring to an emergency condition affecting the contents or the wall of the scrotum.
There are a number of conditions that present acutely, predominantly with pain and/or swelling
A careful and detailed history and examination, and in some cases, investigations allow differentiation between these diagnoses. A prompt diagnosis is essential as the patient may require urgent surgical intervention
Testicular torsion refers to twisting of the spermatic cord, causing ischaemia of the testicle.
Testicular torsion results from inadequate fixation of the testis to the tunica vaginalis producing ischemia from reduced arterial inflow and venous outflow obstruction.
The prevalence of testicular torsion in adult patients hospitalized with acute scrotal pain is approximately 25 to 50 percent
Ethanol (CH3CH2OH), or beverage alcohol, is a two-carbon alcohol
that is rapidly distributed in the body and brain. Ethanol alters many
neurochemical systems and has rewarding and addictive properties. It
is the oldest recreational drug and likely contributes to more morbidity,
mortality, and public health costs than all illicit drugs combined. The
5th edition of the Diagnostic and Statistical Manual of Mental Disorders
(DSM-5) integrates alcohol abuse and alcohol dependence into a single
disorder called alcohol use disorder (AUD), with mild, moderate,
and severe subclassifications (American Psychiatric Association, 2013).
In the DSM-5, all types of substance abuse and dependence have been
combined into a single substance use disorder (SUD) on a continuum
from mild to severe. A diagnosis of AUD requires that at least two of
the 11 DSM-5 behaviors be present within a 12-month period (mild
AUD: 2–3 criteria; moderate AUD: 4–5 criteria; severe AUD: 6–11 criteria).
The four main behavioral effects of AUD are impaired control over
drinking, negative social consequences, risky use, and altered physiological
effects (tolerance, withdrawal). This chapter presents an overview
of the prevalence and harmful consequences of AUD in the U.S.,
the systemic nature of the disease, neurocircuitry and stages of AUD,
comorbidities, fetal alcohol spectrum disorders, genetic risk factors, and
pharmacotherapies for AUD.
Report Back from SGO 2024: What’s the Latest in Cervical Cancer?bkling
Are you curious about what’s new in cervical cancer research or unsure what the findings mean? Join Dr. Emily Ko, a gynecologic oncologist at Penn Medicine, to learn about the latest updates from the Society of Gynecologic Oncology (SGO) 2024 Annual Meeting on Women’s Cancer. Dr. Ko will discuss what the research presented at the conference means for you and answer your questions about the new developments.
Recomendações da OMS sobre cuidados maternos e neonatais para uma experiência pós-natal positiva.
Em consonância com os ODS – Objetivos do Desenvolvimento Sustentável e a Estratégia Global para a Saúde das Mulheres, Crianças e Adolescentes, e aplicando uma abordagem baseada nos direitos humanos, os esforços de cuidados pós-natais devem expandir-se para além da cobertura e da simples sobrevivência, de modo a incluir cuidados de qualidade.
Estas diretrizes visam melhorar a qualidade dos cuidados pós-natais essenciais e de rotina prestados às mulheres e aos recém-nascidos, com o objetivo final de melhorar a saúde e o bem-estar materno e neonatal.
Uma “experiência pós-natal positiva” é um resultado importante para todas as mulheres que dão à luz e para os seus recém-nascidos, estabelecendo as bases para a melhoria da saúde e do bem-estar a curto e longo prazo. Uma experiência pós-natal positiva é definida como aquela em que as mulheres, pessoas que gestam, os recém-nascidos, os casais, os pais, os cuidadores e as famílias recebem informação consistente, garantia e apoio de profissionais de saúde motivados; e onde um sistema de saúde flexível e com recursos reconheça as necessidades das mulheres e dos bebês e respeite o seu contexto cultural.
Estas diretrizes consolidadas apresentam algumas recomendações novas e já bem fundamentadas sobre cuidados pós-natais de rotina para mulheres e neonatos que recebem cuidados no pós-parto em unidades de saúde ou na comunidade, independentemente dos recursos disponíveis.
É fornecido um conjunto abrangente de recomendações para cuidados durante o período puerperal, com ênfase nos cuidados essenciais que todas as mulheres e recém-nascidos devem receber, e com a devida atenção à qualidade dos cuidados; isto é, a entrega e a experiência do cuidado recebido. Estas diretrizes atualizam e ampliam as recomendações da OMS de 2014 sobre cuidados pós-natais da mãe e do recém-nascido e complementam as atuais diretrizes da OMS sobre a gestão de complicações pós-natais.
O estabelecimento da amamentação e o manejo das principais intercorrências é contemplada.
Recomendamos muito.
Vamos discutir essas recomendações no nosso curso de pós-graduação em Aleitamento no Instituto Ciclos.
Esta publicação só está disponível em inglês até o momento.
Prof. Marcus Renato de Carvalho
www.agostodourado.com
2. Microtubules and microfilaments
The Cytoskeleton الخلو الهيكل
ي
A network of fibres االلياف من شبكة that provide structural support تدعيم to the
cell. The cytoskeleton also functions in cell motility الخلية تحرك and
regulation
It is made of 3 fiber types
– Microfilaments
– Microtubules
– Intermediate filaments
It has 3 main functions:
– provides mechanical support
of the cell keeps organelles in
fixed locations
– helps move materials within
the cell
– plays a major role in cell
motility
4. 4
Cytoskeleton
Responsible for cell
motility, and
separation of
chromosome during
cell division.
(Tubulin protein)
Support cell
motility and
transport materials
within the cell.
(Actin protein)
Reinforcing the cell
shape and fixing
position of
organelles.
(Fibrous protein)
Microfilaments
Intermediate
filaments
Microtubules
Thick Thin Middle
سميكة رفيعة متوسطة
دق أنيبيبات
يقة دقيقة ألياف متوسط ألياف
ة
5. 5
• The cytoskeleton is dynamic, dismantling يتفكك in one part and
reassembling يتجمع in another to change cell shape.
• The cytoskeleton also plays a major role in cell motility الخلية حركة by
interacting with motor proteins الحرك البروتين
ي .
• Motor proteins are able to move along the surface of a suitable
substrate (powered by ATP).
• Motor proteins are the driving force behind most active transport of
proteins and vesicles in the cytoplasm
Cell Movement
– Crawling is accomplished
via actin filaments and the
protein myosin.
– In cilia and flagella motor
proteins pull components
of the cytoskeleton past
each other بعضهم عكس.
– This is also true
in muscle cells.
6. Motor proteins
Transport
vesicle
Motor proteins
Microtubule
ATP ADP+Pi ATP ADP+Pi
MOTOR PROTEINS "WALKS" ALONG A MICROTUBULE TRACK
Motor proteins are a class of molecular motors that are able to move along the
surface of a suitable substrate. They are powered by the hydrolysis of ATP and
convert chemical energy into mechanical work.
7. • Interactions of motor proteins and the cytoskeleton circulates
materials within the cell.
• The cytoskeleton may transmit mechanical signals that
rearrange the nucleoli and other structures.
• Motor molecules also
carry vesicles or organelles
to various destinations
مختلفة أماكن إلى provided by the
cytoskeleton.
9. 9
• In many cells, microtubules grow out from a centrosome الجسم
المركز
ي near the nucleus.
• In animal cells, the centrosome has a pair of centrioles, each
with 9 triplets of microtubules أنيبيبات ثالثة من مكون منها كل مجموعات تسعة (9 + 0
pattern) arranged in a ring رتبةُم
دائريا .
• During cell division the
centrioles replicate تتضاعف.
10. 10
• Microtubules are the central structural supports both
cilia األهداب and flagella األسواط.
– Both can move unicellular and small multicellular organisms by
propelling دفع water outside the organism.
Cilia and Flagella
• Cilia usually occur in large numbers on the cell surface.
• Flagella usually occur in just one or a few per cell.
• Cilia move more like oars مجادبف with alternating power
and recovery strokes.
• Flagella have an undulatory movement تموجية حركة.
• So, They differ in their beating pattern الحركة أسلوب.
12. 12
Both cilia and flagella have the same
ultrastructure الدقيق التركيب.
Both have a core مركز of
microtubules sheathed by the
plasma
membrane.
9-doublets (9 + 2 pattern) تسعة
أنيبيبتان من مكون منها كل مجموعات of
microtubules arranged around a
pair at the center.
Flexible “wheels” of proteins
connect outer doublets to each
other
and to the core.
The outer doublets are
also connected by motor
proteins.
The structure of cilium
and flagellum is identical
to that of centriole.
13. 13
• Cilia and flagella are formed of arms of a motor
protein (dynein بروتين
الداينين ).
– Dynein arms alternately
grab, move, and release
the outer microtubules.
– Protein cross-links limit
sliding and the force is
expressed as bending إلتواء.
http://www.northland.cc.mn.us/biology/biology1111/animations/flagellum.html
14. 14
7- Cell membrane
• The plasma
membrane
functions as a
selective barrier
إختيارى حاجز that
allows passage
of oxygen,
nutrients, and
wastes for the
whole volume of
the cell.
15.
16. Cell membrane
Composed of lipids
(phospholipids) and proteins
Lipid layer contains hydrophilic
and hydrophobic regions
Phospholipid
Hydrophilic للماء حبُم
Hydrophobic للماء كاره
Proteins
17. 17
Term Prokaryotes Eukaryotes
Size 1-10 µm in diameter 10-100 µm in diameter
Cell wall Existed In plant cell (not animal cell)
nucleus
No nuclear envelope but
Nucleoid
True nucleus exists with
nuclear envelope
DNA
As fibre in the nucleoid
region (plasmids in some cases)
As Chromatin (DNA and
protein)
Specialized
Organells
Most of them are absent All are existed
Cell
division
By Binary Fission Meiotic and/or Mitotic
Comparison between Prokaryotes and Eukaryotes