1. Hemostasis Explain the three major steps of Hemostasis.
High School pg 349 – 350
College pg 675 – 677
Explain the three major steps of Hemostasis.

2. Nervous System Exam Data
Period
Average
Highest A B C D F
1st
65.13
107 3 2 6 1 12
2nd
73.24
110 5 4 7
3rd
60.32 16
4th
69.28
106 9
5th
63.85
101
6th
65.67
104 8
10 pt curve

3. Hemostasis
Step 1: Vascular Spasms
Figure 10.6, step 1

4. Hemostasis
Injury to lining of vessel exposes collagen fibers; platelets adhere
Platelet plug forms
Collagen fibers
Platelets
Step 1: Vascular Spasms
Step 2: Platelet Plug Formation
Figure 10.6, step 3

5. Hemostasis Figure 10.6, step 4
Injury to lining of vessel exposes collagen fibers; platelets adhere
Platelet plug forms
Platelets release chemicals that attract more platelets to the site and make nearby platelets sticky
Collagen fibers
Platelets
PF3 from platelets
Calcium and other clotting factors in blood plasma
Tissue factor in damaged tissue
Step 1: Vascular Spasms
Step 2: Platelet Plug Formation +
Figure 10.6, step 4

6. Hemostasis Figure 10.6, step 8
Injury to lining of vessel exposes collagen fibers; platelets adhere
Fibrin clot with trapped red blood cells
Platelet plug forms
Platelets release chemicals that attract more platelets to the site and make nearby platelets sticky
Collagen fibers
Platelets
Fibrin
PF3 from platelets
Calcium and other clotting factors in blood plasma
Formation of prothrombin activator
Prothrombin
Fibrinogen (soluble)
Fibrin (insoluble)
Thrombin
Tissue factor in damaged tissue
Phases of coagulation (clotting cascade)
Step 1: Vascular Spasms
Step 2: Platelet Plug Formation
Step 3: Coagulation +
Figure 10.6, step 8

7. Hemostasis
Figure 10.7

8. Hemostasis Blood usually clots within 3 to 6 minutes
The clot remains as endothelium regenerates
The clot is broken down after tissue repair

9. High school pg 359, #31
Answer the following:
A middle aged college professor from Boston is in the Swiss Alps studying astronomy.
He arrived two days ago and plans to stay the entire year.
However, he notices that he is short of breath when he walks up steps and that he tires easily with any physical activity.
His symptoms gradually disappear; after two months, he feels fine.
Upon returning to the US, he has a complete physical exam and is told that his erythrocyte count is higher than normal.
Explain his finding.
Will is RBC count remain at this higher-than-normal level? Explain