Eosinophils and Basophils Overview

The video tutorial explores the characteristics and functions of basophils and eosinophils. Basophils are small cells with segmented nuclei, involved in hypersensitivity reactions and cytokine production. They express various receptors and are activated similarly to mast cells. Eosinophils have bi-lobed nuclei and specific granules containing cationic proteins. They participate in phagocytosis, antigen presentation, and are implicated in various disorders like asthma and eosinophilia. The tutorial highlights the roles of these cells in immune responses and their involvement in pathological conditions.

What is the typical size range of basophils?

• 15–18 micrometers

• 10–12 micrometers

• 5–8 micrometers

• 20–25 micrometers

Which type of stain is used to identify basophils?

• Hematoxylin

• Toluidine blue

• Eosin

• Safranin

Which receptor is involved in basophil activation similar to mast cells?

• CD14

• CCR5

• FcεRI

• TLR4

What is the primary mediator stored in basophil granules?

• Dopamine

• Histamine

• Adrenaline

• Serotonin

In which type of hypersensitivity reaction are basophils primarily involved?

• Type I

• Type II

• Type III

• Type IV

What is a major cationic protein found in eosinophil granules?

• Dopamine

• Major basic protein (MBP)

• Histamine

• Serotonin

Which receptor is NOT expressed by eosinophils?

• FcγRII/CD32

• FcεRI

• FcαRI/CD89

• CR1/CD35

What is a common condition characterized by airway eosinophilia?

• Arthritis

• Hypertension

• Diabetes

• Asthma

Which of the following is a function of eosinophils?

• Phagocytosis

• Neurotransmitter release

• Antibody production

• Hormone secretion

Which parasitic infection is commonly associated with eosinophilia in tropical countries?

• Toxocara species

• Plasmodium falciparum

• Trypanosoma brucei

• Leishmania donovani