Correct Answer: B

Rationale: The correct answer is B: Compatible blood and tissue types. This is crucial to minimize the risk of rejection and ensure a successful transplant. Matching blood and tissue types help prevent the recipient's immune system from attacking the new organ. Blood relationship (A) is not as important as compatibility. Sex and size (C) are important considerations for certain transplants but not the most crucial factor. Need (D) is relevant but does not outweigh the importance of compatibility to ensure a successful transplant.

Correct Answer: D

Rationale: The correct answer is D because all the treatment modalities listed - surgery, radiotherapy, and chemotherapy - play essential roles in managing breast cancer. Surgery removes the primary tumor, radiotherapy targets any remaining microscopic disease, and chemotherapy systematically destroys cancer cells throughout the body. Each modality addresses a different aspect of the disease, making a comprehensive treatment approach necessary for the best outcomes. Choices A, B, and C alone do not cover all necessary aspects of breast cancer treatment, hence D is the correct choice.

Correct Answer: C

Rationale: Step 1: Patients with Grave's disease who undergo thyroidectomy require regular follow-up care for monitoring thyroid hormone levels and overall health. Step 2: Regular follow-up care ensures early detection of any complications or recurrence of the disease. Step 3: Monitoring helps in adjusting medication doses and managing any potential side effects. Step 4: Choice A is important but not specific to thyroidectomy for Grave's disease. Choice B is not typically used post-thyroidectomy. Choice D may be beneficial but not a priority compared to regular follow-up care.

Correct Answer: C

Rationale: The correct answer is C: Axon. The axon is the part of the neuron that transmits impulses away from the cell body towards other neurons or target cells. It is coated with a myelin sheath, which helps speed up the transmission of impulses. Dendrites (A) receive signals from other neurons, the neurolemma (B) is the outermost layer of the myelin sheath, and the synapse (D) is the junction between two neurons where neurotransmitters are released. Therefore, the axon is the only part of the neuron specifically responsible for transmitting impulses away from the cell body.

Correct Answer: B

Rationale: The correct answer is B: Nausea and vomiting. Chemotherapeutic drugs commonly cause nausea and vomiting due to their effect on the gastrointestinal system. This is because these drugs can irritate the stomach lining and trigger the vomiting center in the brain. Nausea and vomiting are well-documented side effects of chemotherapy and are often managed with antiemetic medications. A: Painful mouth sores are a common side effect of some chemotherapeutic drugs, but they are not the most common adverse effect. C: Frequent diarrhea can occur as a side effect of chemotherapy, but it is less common than nausea and vomiting. D: Constipation is not a common adverse effect of chemotherapeutic drugs; in fact, diarrhea is more commonly seen.