Correct Answer: D

Rationale: The large intestine, also known as the colon, is responsible for absorbing water and electrolytes from undigested food residue that passes through the digestive system after it has been processed in the small intestine. As the waste material moves through the colon, water is absorbed, and the remaining material forms feces. The feces are then stored until they are eliminated from the body through the rectum and anus. The liver, stomach, and pancreas play important roles in digestion and nutrient absorption, but the specific function of absorbing water and forming feces is carried out by the large intestine.

Correct Answer: C

Rationale: The patient is likely infected with Cryptosporidium parvum based on the symptoms of watery diarrhea, abdominal cramps, and nausea after consuming contaminated water. Cryptosporidium is a protozoan parasite that can be transmitted through contaminated water sources, such as streams. Laboratory tests revealing oocysts in the stool sample further support the diagnosis of Cryptosporidium infection, as these oocysts are characteristic of this parasite. Giardia lamblia is another common protozoan parasite that can cause similar symptoms but is usually associated with more foul-smelling, greasy diarrhea. Entamoeba histolytica causes amoebic dysentery, which presents with bloody diarrhea and abdominal pain. Cyclospora cayetanensis also causes watery diarrhea, but it is usually associated with foodborne outbreaks rather than waterborne transmission.

Correct Answer: C

Rationale: The presentation described in the question, including the skin lesion resembling a "bull's eye" rash at the site of a tick bite, is characteristic of Lyme disease. Lyme disease is caused by the spirochete bacterium Borrelia burgdorferi, which is transmitted to humans through the bite of infected black-legged ticks (Ixodes scapularis). The symptoms of Lyme disease include fever, headache, myalgia, and the erythema migrans rash, which appears as a red circular rash with central clearing resembling a bull's eye.

Correct Answer: D

Rationale: Complete abortion is the most likely cause of the symptoms described. In a complete abortion, all products of conception are expelled from the uterus. Symptoms include vaginal bleeding, passage of tissue, and dilation of the cervix. In this scenario, the presentation of a dilated cervix with visualized products of conception is classic for a complete abortion at 10 weeks gestation.

Correct Answer: C

Rationale: In a postpartum client exhibiting signs of anxiety, restlessness, and palpitations, it is essential to prioritize notifying the healthcare provider immediately. These symptoms could indicate a serious condition such as postpartum preeclampsia, postpartum hemorrhage, or postpartum cardiomyopathy, which require urgent medical attention. It is crucial to rule out any life-threatening conditions and ensure the client receives appropriate treatment promptly. While relaxation techniques and deep breathing exercises can be helpful for anxiety management in some cases, in this situation, the priority is to ensure the client's safety and well-being by seeking medical evaluation and intervention. Administering a benzodiazepine without consulting the healthcare provider first could potentially mask symptoms or interact with other medications the client may be taking, making it unsafe to proceed without professional guidance.