This official Life and Earth Sciences (SVT) examination paper from the EEHB Baccalaureate 2021 session is a comprehensive document containing both the exam questions and detailed answer key. It is structured in two major parts evaluating candidates' resources and competencies.

Part A, dedicated to resource evaluation, is divided into three sections. The first section focuses on knowledge assessment through Multiple Choice Questions (MCQ) covering cell biology (cellular organelles) and environmental education (plastic waste). A document analysis exercise then addresses immunology, particularly the phases of HIV infection, viral load, specific immune responses, and opportunistic infections.

The second section evaluates practical skills in neurophysiology. Candidates must describe the protocol for measuring resting and action potentials on a nerve fiber, identify correct experimental setups, analyze action potential curves, and interpret the different phases (depolarization, repolarization, hyperpolarization).

Part B evaluates competencies through a problem-based scenario focusing on combating immune system disorders and metabolic diseases. The scenario features a young girl suffering from vitiligo, an autoimmune disease causing skin depigmentation. Candidates must:

• Write an explanatory text to raise awareness about the autoimmune nature of vitiligo
• Design an awareness poster against the stigmatization of people with dermatological conditions
• Establish a link between poor eating habits, obesity, and metabolic diseases such as hypertension and diabetes

The complete answer key is included with detailed evaluation grids comprising criteria for relevance, mastery of scientific knowledge, and production coherence. This document is an essential revision tool for Baccalaureate series C and Ti candidates seeking to master topics in immunology, neurophysiology, and health education.