17. Blood

Hemostasis and clot formation

Hemostasis

Hemostasis: Control of Bleeding, Coagulation and Thrombosis, Animation

Blood Clotting (Hemostasis)

 A thrombus is a stationary clot that may occlude circulation and lead to death of the surrounding tissue. 

 Which term describes a clot that develops and persists in an unbroken blood vessel? 

 platelet plug formation, vascular spasm, coagulation 

 Hemostasis leads to stoppage of bleeding. The hemostasis response is fast, localized, and controlled. It involves clotting factors and substances released by damaged tissue and platelets. The first step in hemostasis is vascular spasm. The vascular spasm response is followed by platelet plug formation and then coagulation (blood clotting). 

 coagulation, vascular spasm, platelet plug formation 

 vascular spasm, coagulation, platelet plug formation 

 vascular spasm, platelet plug formation, coagulation 

 Which of the following shows the correct sequence of hemostasis from start to end? 

 The conversion of soluble plasma fibrinogen into an insoluble fibrin completes the clotting process. 

fibrinogen &rarr; fibrin

prothrombin &rarr; thrombin

 The final step in clot formation is __________. 

 A free-floating blood clot is an embolus. A thrombus can detach from a vessel and become an embolus.  

 A free-floating blood clot is called a thrombus.  

Thromboxane A2 attracts more platelets to the site of damage and increases vascular spasm in the damaged area. Prostacyclin limits the platelet plug to the immediate damaged area.

 Serotonin enhances vascular spasm in a damaged area. Prostacyclin limits the platelet plug to the immediate damaged area. 

 Adenosine diphosphate attracts more platelets to the damaged area. Prostacyclin limits the platelet plug to the immediate damaged area. 

 Which of the following substances is responsible for limiting a platelet plug to the immediate area of damage? 

 The extrinsic pathway is independent of procoagulants. 

 There are two pathways for blood clotting: the extrinsic and intrinsic pathways. Both pathways require calcium ions and procoagulants. They both lead to the production of prothrombin activator. Both the intrinsic and extrinsic blood clotting cascades can be triggered by tissue damage; however, the extrinsic pathway utilizes tissue factor, while the intrinsic pathway does not. Another difference between these cascades is that the extrinsic pathway is faster than the intrinsic pathway. 

 The extrinsic pathway does not involve calcium ions. 

 The extrinsic pathway is slower than the intrinsic pathway of blood clotting. 

 The extrinsic pathway is triggered by tissue factor. 

 Which of the following is true regarding the extrinsic pathway of blood clotting?  

The Composition and Function of Blood

 The life span of platelets is between 30 and 60 days. 

 Platelets are essential for the clotting process. 

 The life span of platelets is between 5 and 10 days. 

 Platelets contain serotonin, ADP, calcium, and PDGF. 

 Platelets are fragments of a larger cell called a megakaryocyte. 

 The formation of platelets is regulated by the hormone thrombopoietin. 

 Which of the following statements about platelets is INCORRECT? 

Hemostasis Overview

Learn the toughest concepts covered in Anatomy & Physiology 1&2 with step-by-step video tutorials and practice problems by world-class tutors



Anatomy & Physiology

https://static.studychannel-prd.pearsonprd.tech/courses/anp/thumbnails/anp

#FFFFFF

Professor Dave Explains

Dr Matt & Dr Mike

Alila Medical Media

1. Introduction to A&P

2. Chemistry

3. Cells

4. Tissues

5. Integumentary System

6. Bones + Skeletal Tissues

7. Skeletal System

8. Joints

9. Muscles and Muscle Tissue

10. Muscular System

11. Nervous Tissue

12. Central Nervous System

13. Peripheral Nervous System

14. Autonomic Nervous System

15. Special Senses

16. Endocrine System

18. Cardiovascular System: the Heart

19. Cardiovascular System: Blood Vessels

20. Lymphatic System

21. Immune System

22. Respiratory System

23. Digestive System

24. Nutrition, Metabolism, Energy Balance

25. Urinary System

26. Fluid and Electrolyte Balance, Acid Base Balance

27. Reproductive System

28. Pregnancy and Human Development

29. Heredity

undefined - Channels

Functions and Components of Blood

Functions and Components  

Blood testing

Blood Testing

Leukocytes

White Blood Cells

Disorders Caused by Abnormalities of Erythrocytes

Leukocyte disorders

Hemostatic disorders

Blood Disorders

ABO and Rh blood groups

Blood Types

General Chemistry

Jules

Study the key concepts of Physics with descriptive videos, questions, and more

Physics

Patrick

General Biology

Jason

Financial Accounting

Brian

Dive deep into Psychology with videos, practice problems, and more.

Psychology

Microeconomics

The first in a two-course sequence introduces the basic structure and functions of the human body

College Algebra covers algebraic topics and skills necessary to succeed in college-level math

College Algebra

Organic Chemistry

Johnny

Genetics

Kylia

GOB Chemistry

Microbiology

Cell Biology

Analytical Chemistry

Study topics incliding trogonometric functions, identities and equations, solutions of triangles, complex numbers, and other topics as time permits

Trigonometry

Learn the toughest concepts covered in Precalculus with step-by-step video tutorials and practice problems by world-class tutors

Precalculus

Biochemistry

Macroeconomics

Chemistry

Biology

Math

Business

Social Sciences

Michelle Barry Franco

Building Great Presentations

Eric Zackrison, PhD

Critical Thinking And Problem Solving

Sam Bennett

Embracing Times Of Uncertainty

Nicole Tetreault, PhD

Emotional Intelligence Basics

Eugene Choi, PharmD

Enhancing Your Critical Thinking Skills

Jason Richardson, PsyD

Habits To Win Every Day

Alyssa Lowery, PhD

Having Powerful Advanced Conversations

Don Gilman, EdD

How To Influence & Persuade

Amy Matthews

Leadership Skills For Rising Stars

Listening To Lead

Michael Shermer, PhD

Making Decisions Under Uncertainty

Lynne Hurdle

Mistakes To Avoid When Resolving Conflict

Michael Veltri

Overcoming Decision Making Traps

Mike Vardy

Prioritizing Effectively

Secrets Of Effective Prioritization

Strategies To Build Up Your Creativity

Tools For Decision Making

Tutti Taygerly

Unleash And Advance Your Creativity

Winning Collaboration: How To Work More Effectively With Different Personalities

Writing Emails People Want To Read

Critical Thinking

Self Management

Digital Literacy

Collaboration

Communication

Analytical Thinking

Leadership

Flexibility/Adaptability

Innovation

Eric Zackrison

Nicole Tetreault

Dive deep into Python with videos and more.

Introduction to Python

Arianne Dee

Agile Project and Product Management

Agile & Product Management

Mariya Breyther 

Introduction to Microsoft Power BI

Microsoft Power BI

Chris Sorensen

Data Analysis Fundamentals with Excel

Data Analysis - Excel

Chris Sorensen & Ammul Shergill

Getting Started with  and Cryptocurrency

Introduction to Blockchain

George Levy

Learn Enough HTML, CSS and Layout to be Dangerous

HTML, CSS & Layout

Lee Donahoe & Michael Hartl

Learn Enough JavaScript to be Dangerous: A Tutorial Introduction to Programming with JavaScript