This is a crucial 'quality check' for T cells. T cells must be able to recognize the body's own MHC molecules to see antigens presented on other cells. Those that bind too weakly die from neglect, those that bind too strongly (against self) are deleted. Only those with a 'just right' moderate affinity survive—this is positive selection.

Break down complex topics into smaller, manageable chunks for easier recall.

Zambia

• Joseph Soko – 101 pts

• Visual Pathway Lesions
• Positive and Negative Symptoms
• Hallucinations and Delusions
• Antipsychotic Medications
• Emergency: Environmental Emergencies