Which of the following medications is contraindicated in patients with allergy to sulphonamides?
Levobunolol
Bimatoprost
Brinzolamide
Brimonidine
What is the most abundant chemical in red blood cells?
Myoglobin
Globin
2,3-diphosphoglycerate
Haemoglobin
About anitibodies:
The antigen receptor on a lymphocyte has the same specificity as the antibody it secretes.
IgM crosses the placenta and provides a fetus with antibody protection.
T lymphocytes secrete IgM in response to a first infection
Antibody molecules have two identical antigen binding sites in the Fc region
Regarding the inflammatory response:
Tissue swelling is the first stage of the inflammatory response
Mast cells secrete chemotactic agents that attract lymphocytes
Macrophages secrete vasoactive materials during the inflammatory response
The inflammatory response can be triggered by antibody binding to the surface of micro-organisms.
Infectious proteins are present in
Satellite viruses
Gemini viruses
Prions
Viroids
Find the false statement:
Male circumcision is associated with a lower risk of HIV infection among men
Use of oral contraceptives is associated with increased risk of HIV infection
Adolescent girls are less susceptible to infection than other aged women
Oral sex is much less efficient mode of transmission of HIV than is receptive analintercourse
The primary function of the lymphatic system is:
Transporting nutrients and oxygen to tissues
Regulation of temperature, fluid, electrolytes, and pH balance
Production, maintenance, and distribution of lymphocytes
Removal of carbon dioxide and waste products from tissues
Regarding the lymphocytes:
The lymphocytes are the most abundant white cells of the blood.
Lymphocytes only leave the blood at sites of inflammation
B lymphocytes respond to antigens in the extracellular fluid
All B lymphocytes become plasma cells after they have been stimulated
Active immunity may be produced by:
Contracting a disease
Receiving a vaccine
Receiving gamma globulin injection
Both A and B
An 18-year girl pustular acne having these lesions over the past several years, which resolved spontaneously. However, the lesions have increased in quantity recently. The dermatologist prescribes an oral antibiotic for the treatment of these lesions. The drug most likely acts by which of the following mechanisms?
Blocks ribosomal initiation complex formation
Causes misreading at translation initiation
Interferes with translocation during translation
Prevents binding of aminoacyl- tRNA to ribosomes
