Question

34) Jackson is blind and reads using Braille, a system of raised dots that are felt with the fingers. Which of the following is the correct sequence of events in the language pathway when Jackson reads using Braille and then tells his friend what he’s reading? a) common integrative area -> Broca’s area -> Wernicke’s area -> speech muscles b) primary auditory cortex -> Wernicke’s area -> Broca’s area -> primary motor cortex c) primary motor cortex -> Broca’s area -> Wernicke’s area -> speech muscles d) primary somatosensory cortex -> Wernicke’s area -> Broca’s area -> primary motor cortex 38) If you hold your breath, carbon dioxide will begin to build up in your blood and creates a desire to breathe. Which type of sensory receptor senses the change in blood carbon dioxide levels? a) chemoreceptor b) mechanoreceptor c) nociceptor d) photoreceptor e) thermoreceptor

Answer 1

ANSWER : 34)

Speech production or language comprehension is a complex function of brain. When a blind person reads using Braille dots then first, sensory information reaches to primary somatosensory cortex of his brain from fingers then received via Wernicke's area (words reception center) and then travels to Broca's center (word production center) located in the inferior frontal gyrus of brain. From Broca's area articulated words speech out via muscles of vocal cord.

38) The specific chemoreceptors present in the carotid artery of brain perceive change in the pH of blood when concentration of CO2 in blood reaches to abnormal level. Hence, option A is correct.