What is the primary purpose of a cervical collar in the management of trauma patients?

Correct Answer: B

Rationale: The primary purpose of a cervical collar in the management of trauma patients is to immobilize the cervical spine. This is crucial in cases of suspected cervical spine injury to prevent any further damage and to maintain spinal stability. By providing support and restricting movement in the cervical spine region, a cervical collar helps prevent potential spinal cord injuries and associated neurological deficits. It is essential to immobilize the cervical spine until a thorough evaluation can be carried out to determine the extent of injury, as any movement of the spine during this period can worsen the damage.

Correct Answer: A

Rationale: Endometriosis is a condition characterized by the abnormal growth of endometrial tissue outside the uterus. One common symptom of endometriosis is excessive menstrual bleeding, known as menorrhagia. This excessive bleeding is due to the presence of endometrial tissue in abnormal locations, leading to inflammation, scarring, and blood accumulation. In severe cases, endometriosis can lead to the formation of adhesions, cysts, and scar tissue, causing significant pain and fertility issues for affected individuals. Endometrial hyperplasia, leiomyomas (uterine fibroids), and adenomyosis are other gynecological conditions, but they do not involve the abnormal proliferation of endometrial tissue outside the uterus like endometriosis does.

Correct Answer: B

Rationale: Adenomyosis is a condition characterized by the presence of endometrial tissue within the myometrium (muscle wall) of the uterus. It can present with symptoms such as cyclic pelvic pain, dysmenorrhea (painful periods), and infertility. On pelvic examination, the uterus may be retroverted (tilted backward) and enlarged due to the presence of adenomyotic nodules within the uterine muscle. Adenomyosis can also cause heavy menstrual bleeding (menorrhagia). Endometriosis, on the other hand, involves the presence of endometrial tissue outside the uterus and can cause similar symptoms but is less likely to result in uterine enlargement or retroversion. Leiomyomas (uterine fibroids) are benign tumors of the uterine muscle and can also cause pelvic pain and abnormal uterine enlargement but are less likely to be associated with dysmenorrhea and infertility

Correct Answer: B

Rationale: During the acute phase response, C-reactive protein (CRP) primarily serves to activate the complement system. CRP binds to phosphocholine on the surface of pathogens, allowing for the activation of the classical pathway of the complement system. This leads to the recruitment of immune cells, opsonization of pathogens, and enhancement of phagocytosis. The activation of the complement system by CRP plays a crucial role in the host defense against infections, aiding in the elimination of pathogens and the resolution of inflammation.

Correct Answer: C

Rationale: Dendritic cells play a critical role in initiating adaptive immune responses by capturing antigens from pathogens, migrating to lymphoid organs, and presenting these antigens to naïve T cells. This activation of naïve T cells by dendritic cells is essential for the adaptive immune system to generate specific immune responses against pathogens. Dendritic cells act as professional antigen-presenting cells, which are specialized to capture, process, and present antigens to T cells, thereby facilitating the activation of T cells and the coordination of adaptive immune responses, such as the production of specific antibodies and the generation of memory T cells.