« previous next »

Author Question: Which of the following is necessary for platelet aggregation? a. Protein S b. Kallikrein c. ... (Read 66 times)

rachel9

  • Sr. Member
  • ****
  • Posts: 495
on: Jun 25, 2018
Which of the following is necessary for platelet aggregation?
 
  a. Protein S
  b. Kallikrein
  c. Vitamin K
  d. Fibrinogen

Question 2

What happens to the fibrin monomers created when thrombin cleaves fibrinopeptides A and B from fibrinogen?
 
  a. Immediately inactivated to prevent excess clotting
  b. Converted to plasminogen
  c. Digested quickly by tissue plasminogen activator (TPA)
  d. Polymerize and are stabilized by factor XIIIa


Athena23

  • Sr. Member
  • ****
  • Posts: 305
Reply #1 on: Jun 25, 2018
Answer to Question 1

ANS: D
Platelet aggregation, the binding of platelets to one another, requires fibrinogen.

Answer to Question 2

ANS: D
Once thrombin splits fibrinopeptides A and B from fibrinogen, the fibrin monomers are formed. These spontaneously polymerize to form the initial soluble fibrin polymer, which is cross-linked by XIIIa and then becomes insoluble. Fibrin monomers spontaneously polymerize to form the fibrin clot, which is then stabilized by factor XIIIa. TPA activates plasminogen to plasmin, which lyses the clot.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.

Did you know?

Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

Did you know?

A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.

Did you know?

In 1844, Charles Goodyear obtained the first patent for a rubber condom.

Did you know?

Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.

Palade's use of the pulse-chase method to study protein secretion Palade's use of the pulse-chase method to study protein secretion
Protein degradation via the proteasome Protein degradation via the proteasome
Protein degradation via the proteasome Protein degradation via the proteasome
An example of genetic homology: a comparison of a short amino acid sequence within the p53 protein f An example of genetic homology: a comparison of a short amino acid sequence within the p53 protein f
Sequence of events from DNA to protein. Sequence of events from DNA to protein.
Your Body Digests, Absorbs, and Synthesizes Protein Your Body Digests, Absorbs, and Synthesizes Protein
Video: Nucleic acid digestion -small intestine

For a complete list of videos, visit our video library