The layer of the uterine wall that is shed during menstruation is the

Correct Answer: A

Rationale: The correct answer is A: endometrium. The endometrium is the innermost layer of the uterine wall that thickens in preparation for potential implantation of a fertilized egg. If fertilization does not occur, this layer is shed during menstruation. The myometrium (B) is the middle layer responsible for uterine contractions during labor. Epimetrium (C) is not a recognized term relating to the uterine wall. Choice D is incorrect as the endometrium is indeed the layer that sheds during menstruation.

Correct Answer: B

Rationale: The correct answer is B: Hypoglycemia. Phenytoin is an anticonvulsant medication that commonly causes side effects such as ataxia, hirsutism, and gum hypertrophy. However, hypoglycemia is not a known side effect of phenytoin. It is important to monitor blood sugar levels in patients taking anticonvulsants, as some medications may lead to hyperglycemia rather than hypoglycemia. Therefore, choice B is the correct answer. Choices A, C, and D are incorrect as they are common side effects associated with phenytoin use.

Correct Answer: D

Rationale: The correct answer is D: On-Off phenomenon. Levodopa is a medication used to treat Parkinson's disease by increasing dopamine levels in the brain. The On-Off phenomenon refers to the fluctuation between periods of good symptom control (On) and poor symptom control (Off) experienced by some patients taking levodopa. Tremor (choice A) is a symptom of Parkinson's but not directly caused by levodopa. Spasticity (choice B) is not typically associated with levodopa use. Akinesia (choice C) is a symptom of Parkinson's but not a direct effect of levodopa. Therefore, the correct answer is D due to levodopa's potential to cause the On-Off phenomenon in Parkinson's disease treatment.

Correct Answer: C

Rationale: The correct answer is C: Diarrhoea. Morphine is known to cause constipation, not diarrhoea. Morphine binds to opioid receptors in the gut, reducing peristalsis and causing constipation. Analgesia and sedation are known effects of morphine due to its action on the central nervous system. Morphine is also known to increase prolactin secretion by acting on the hypothalamus. Therefore, the correct answer is C, as morphine does not typically cause diarrhoea.

Correct Answer: C

Rationale: The correct answer is C: Olanzapine. Olanzapine is an atypical antipsychotic medication, not an SSRI. SSRIs (Selective Serotonin Reuptake Inhibitors) are a class of antidepressants that specifically target serotonin reuptake. Fluvoxetine, Paroxetine, and Fluvoxamine are all SSRIs used to treat depression and anxiety disorders. Olanzapine, on the other hand, is primarily used to treat schizophrenia and bipolar disorder by targeting dopamine and serotonin receptors. Therefore, C is the correct answer as it does not belong to the class of selective SSRIs.