The drug against myoclonic seizures is:

Correct Answer: C

Rationale: The correct answer is C: Clonazepam. Clonazepam is a benzodiazepine commonly used for myoclonic seizures due to its ability to enhance the inhibitory neurotransmitter GABA in the brain, reducing seizure activity. Primidone (A), Carbamazepine (B), and Phenytoin (D) are more commonly used for other types of seizures like focal or generalized tonic-clonic seizures, not specifically for myoclonic seizures.

Correct Answer: D

Rationale: The correct answer is D: Meperidine. Meperidine is the preferred opioid analgesic for relieving acute severe pain of renal colic due to its rapid onset of action and short duration of effect. It is particularly useful in this scenario as it provides quick pain relief without causing excessive sedation or respiratory depression. A: Morphine is a strong opioid analgesic but is not the preferred choice for renal colic due to its slower onset of action. B: Naloxone is an opioid antagonist and is used to reverse opioid overdose, not for pain relief. C: Methadone is a long-acting opioid analgesic and is not typically used for acute severe pain relief such as in renal colic.

Correct Answer: B

Rationale: Neuroleptics are primarily used to treat psychosis, which includes symptoms like hallucinations and delusions. These medications work by blocking dopamine receptors in the brain to reduce these symptoms. Neurosis (choice A) is a milder condition characterized by anxiety and distress, typically treated with psychotherapy. Narcolepsy (choice C) is a sleep disorder treated with stimulants. Parkinsonian disorders (choice D) are movement disorders and are treated with medications that increase dopamine levels. Therefore, the correct answer is B as neuroleptics are specifically designed to address symptoms associated with psychosis.

Correct Answer: B

Rationale: The correct answer is B: Blocking a major degradative pathway for the amine neurotransmitters, which permits more amines to accumulate in presynaptic stores. MAO inhibitors work by blocking the enzyme monoamine oxidase, which is responsible for breaking down neurotransmitters like serotonin, dopamine, and norepinephrine. By inhibiting this enzyme, MAO inhibitors allow these neurotransmitters to accumulate in the synaptic cleft, leading to increased neurotransmission. A: Blocking the amine reuptake pumps is the mechanism of action for tricyclic antidepressants, not MAO inhibitors. C: Inhibiting the storage of amine neurotransmitters in vesicles is not a known mechanism of action for MAO inhibitors. D: Antagonism of alpha2-norepinephrine receptors is the mechanism of action for alpha2-adrenergic receptor antagonists, not MAO inhibitors.

Correct Answer: C

Rationale: The correct answer is C because Bemegride has both central and reflector effects. It acts centrally by stimulating the medullar respiratory center (not inhibiting it as in choice A), and peripherally by stimulating chemoreceptors in the carotid sinus zone (not acting as a spinal analeptic as in choice D). Therefore, choice C accurately describes the dual mechanism of action of Bemegride, making it the correct choice.