Question

1. Which of the following substances cannot cross the blood-brain barrier under normal circumstances? a. botulinum b. ethanol c. insulin d. ampicillin e. all of the above will not cross the blood-brain barrier 2. Damage to which of the following would impair speech: a. left temporal lobe of the cerebrum b. Broca's and Wernicke's areas c. trigeminal nerve d. glossopharyngeal nerve e. all of the above 3. Which of the following medications would be most helpful to a patient with Parkinson's disease? a. Levodopa b.Selective serotonin reuptake inhibitors (SSRI) C. Selective norepinephrine reuptake inhibitors (SNRI) d. Benzodiazepines e. All of the above

Answer 1

Ans 1. (a) botulinum infection.

BBB as called doesn't allow infectious particles to cross it and enter brain CSF under normal conditions.

Only polar substances, hormones, and electrolytes are allowed to cross to maintain CSF volumes.

Ans 2 (b) brocha's and wernich's area.

These are the centres for speech modulation and understand of speech.

Ans 3. (a) levodopa

It helps to eliminate symptoms of stiffness, rigidity, slowness inbody .

Brain converts levoodopa into dopamine a potent brain activator. Which is used for brain activation.