Platelets: Formation and Functions

Play an AI-generated podcast conversation about this lesson

What is the term for a decrease in platelet count?

Plateletosis

Thrombocytosis

Megakaryopenia

Thrombocytopenia (correct)

Where are 30% of the platelets released from the bone marrow found?

Kidneys

Lungs

Liver

Spleen (correct)

What is the lifespan of platelets?

About 30 days

About 10 days (correct)

About 20 days

About 5 days

Which factor released from platelets inhibits the action of heparin to help blood coagulation?

Platelet factor 4 (PF4) Signup and view all the answers

What causes local vasoconstriction immediately after injury?

Serotonin and thromboxan A2 from platelets Signup and view all the answers

Who is known as the Father of microbiology?

Louis Pasteur Signup and view all the answers

Which type of pathogens cause harm to the host as part of their normal life cycle?

Primary pathogens Signup and view all the answers

What is the main function of Glycocalyx in bacteria?

Protect a cell against dehydration Signup and view all the answers

What distinguishes a prokaryotic cell from a eukaryotic cell?

Presence of membrane-bound nucleus Signup and view all the answers

What did Alexander Fleming discover in 1928?

Penicillin Signup and view all the answers

Where can bacteria inhabit based on the provided information?

Air, soil, water, plant and animal surfaces and tissues Signup and view all the answers

What is the function of flagella in bacteria?

Movement toward or away from a particular stimulus Signup and view all the answers

Which part of the flagellum functions like a rotary engine generating a propeller force?

The basal body Signup and view all the answers

What is the function of fimbriae in bacteria?

Attachment of bacteria cells to specific surfaces Signup and view all the answers

What is the primary function of the cell wall in bacteria?

Protection and shape maintenance Signup and view all the answers

Which type of bacteria has an outer membrane rich in lipids containing lipopolysaccharides (LPS)?

Gram-negative Signup and view all the answers

What are porins in Gram-negative bacteria responsible for?

Regulation of ion passage Signup and view all the answers

What is the composition of the ribosome in bacteria?

RNA (rRNA) and proteins Signup and view all the answers

What is the function of metachromatic or Volutin granules in bacteria?

Energy production and storage Signup and view all the answers

What is the function of magnetosomes in bacteria?

Facilitate movement toward or away from a particular stimulus Signup and view all the answers

Where is the nucleoid located in a bacterial cell?

In the cytoplasm Signup and view all the answers