Correct Answer: B

Rationale: Oxytocin release is responsible for the mild cramping and uterine contractions experienced by the new mother while breastfeeding. When a baby suckles at the breast, it stimulates nerve endings that signal the release of oxytocin from the posterior pituitary gland. Oxytocin is a hormone that plays a crucial role in stimulating the contraction of the uterine muscles, helping the uterus to contract back to its pre-pregnancy size. This process, known as uterine involution, is essential for postpartum recovery and preventing excessive bleeding. Therefore, the new mother's experience of mild cramping and uterine contractions while breastfeeding is a normal physiological response mediated by the release of oxytocin.

Correct Answer: C

Rationale: If the nurse notices that the patient's arms are not adequately padded while positioning for surgery, the nurse should immediately take action to prevent pressure injuries. Applying soft padding to the patient's arms will help distribute the pressure more evenly, reducing the risk of skin breakdown and potential harm to the patient during the surgical procedure. It is essential to prioritize the patient's safety and comfort in such situations. Simply proceeding with the positioning as planned could lead to complications, so addressing the inadequate padding promptly is the appropriate course of action.

Correct Answer: C

Rationale: Deep vein thrombosis (DVT) is a serious condition that requires prompt medical intervention. The presence of calf pain, swelling, and warmth in a postpartum client are concerning signs of a potential DVT. By notifying the healthcare provider immediately, appropriate diagnostic tests, such as ultrasound imaging, can be ordered to confirm the diagnosis. Timely treatment with anticoagulant medication can then be initiated to prevent complications such as pulmonary embolism. Applying warm compresses or encouraging ambulation may exacerbate the condition by promoting clot dislodgement, making immediate notification of the healthcare provider the most appropriate nursing action in this situation.

Correct Answer: C

Rationale: A pituitary adenoma is a type of benign tumor that arises from the pituitary gland, which is located at the base of the brain. When a pituitary adenoma grows large enough, it can compress surrounding structures, including the optic chiasm – the point at which the optic nerves cross over in the brain. Compression of the optic chiasm can lead to symptoms such as vision problems (e.g., visual disturbances), headaches, and nausea/vomiting, which are consistent with the presentation described in the question. Meningiomas, glioblastoma multiforme, and medulloblastomas are less likely to compress the optic chiasm and present with different characteristic symptoms based on their locations and growth patterns.

Correct Answer: C

Rationale: Rabies is a viral disease that affects the central nervous system. It is primarily transmitted through the bite of an infected animal, such as dogs, bats, raccoons, and foxes. The causative agent of rabies is the rabies virus, specifically from the genus Lyssavirus. Once the virus enters the body, it spreads through the nervous system to the brain, leading to severe neurological symptoms and, if left untreated, is almost always fatal. This is why prompt medical attention and vaccination following an animal bite are crucial in preventing the development of rabies in humans.