Question

sur les illustrations ci - dessous, les lignes rouges représentent les nerfs sensitifs, les lignes bleues désignent les nerfs moteurs et les flèches indiquent le sens de linflux nerveux. laquelle de ces illustrations est adéquate? a) image b) image c) image d) image

Explanation:

To solve this, we analyze the direction of nerve impulses:

• Sensory nerves (red): Carry impulses from the body to the brain (toward the brain).
• Motor nerves (blue): Carry impulses from the brain to the body (away from the brain).

Analyze each option:

• Option a: Red (sensory) arrow points away from the brain (incorrect). Blue (motor) arrow points away (correct for motor, but sensory is wrong).
• Option b: Red (sensory) arrow points toward the brain (correct). Blue (motor) arrow points away from the brain (correct).
• Option c: Red (sensory) arrow points away (incorrect). Blue (motor) arrow points toward (incorrect).
• Option d: Red (sensory) arrow points toward (correct), but blue (motor) arrow points toward (incorrect, motor should go away).

Only option b has sensory nerves (red) carrying impulses to the brain and motor nerves (blue) carrying impulses from the brain.

Answer:

b)