Toelatingsexamen Arts & Tandarts België (Medical & Dental Entrance Exam) · Biology and Life Sciences
Immunology, Renal Excretion, Reproduction, and Human Genetics
30 practice questions, each with the answer and an explanation.
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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.
All 30 questions
- Which characteristic distinguishes adaptive (acquired) immunity from innate immunity?
- Which cells function as professional antigen-presenting cells (APCs) capable of activating naive CD4+ T helper cells by expressing surface Class II Major Histocompatibility Complex (MHC II) molecules?
- How do cytotoxic CD8+ T lymphocytes recognize foreign antigens on the surface of target cells?
- During T-cell development in the thymic cortex, what is the outcome of positive selection?
- Which structural region of an antibody molecule determines its antigen-binding specificity?
- Which immunoglobulin isotype is the first to be secreted in significant quantities during a primary humoral immune response to a novel pathogen?
- Which clinical scenario represents an example of artificial passive immunity?
- Why is inulin clearance considered the gold-standard physiological measurement for glomerular filtration rate (GFR)?
- A patient has a urine flow rate of 2.0 mL/min, a urine creatinine concentration of 100 mg/dL, and a plasma creatinine concentration of 1.0 mg/dL. What is the patient's renal creatinine clearance?
- Which layer of the glomerular filtration barrier possesses negative electrostatic charges that prevent the filtration of circulating plasma albumin?
- How does the myogenic mechanism respond when arterial blood pressure suddenly rises?
- Why does glucosuria occur in patients with uncontrolled diabetes mellitus?
- How do renal intercalated cells in the late distal tubule and collecting duct contribute to systemic acid-base balance during metabolic acidosis?
- At which stage of meiosis are primary oocytes arrested in human females from late fetal life until puberty?
- Which hormonal event directly triggers ovulation in the human female menstrual cycle?
- What physiological reaction prevents polyspermy (fertilization of an ovum by more than one sperm)?
- Which hormone is produced by the syncytiotrophoblast of the early blastocyst to rescue and maintain the corpus luteum during the first trimester of pregnancy?
- From which embryonic germ layer does the central nervous system (brain and spinal cord) develop?
- Which organ system is derived embryologically from the embryonic endoderm?
- In a clinical pedigree exhibiting an autosomal dominant mode of inheritance, what is a hallmark transmission characteristic?
- Which transmission pattern uniquely characterizes mitochondrial (maternal) inheritance?
- What cytogenetic abnormality causes Down syndrome in approximately 95% of clinical cases?
- Which karyotype defines an individual with Turner syndrome?
- Which genetic mechanism explains why deletion of the 15q11-q13 chromosomal region causes Prader-Willi syndrome when inherited from the father, but Angelman syndrome when inherited from the mother?
- What specific amino acid substitution in the beta-globin chain causes sickle cell anemia (HbS)?
- Why does Rhesus (Rh) incompatibility present a severe risk of hemolytic disease of the newborn primarily during a second or subsequent pregnancy rather than the first?
- Which blood type is considered the universal erythrocyte donor for emergency packed red blood cell transfusions, and why?
- What happens to the left ventricular pressure-volume loop during an acute increase in cardiac afterload (e.g., severe aortic stenosis)?
- Which gastrointestinal hormone is secreted by S cells in the duodenum in response to acidic chyme and stimulates pancreatic secretion of watery, bicarbonate-rich fluid?
- What is the function of the hepatic portal circulation in human digestion and metabolism?
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