Which of the following contributes to the nerve supply of the kidney?
**Core Concept**
The kidney receives its nerve supply from the renal plexus, which is formed by sympathetic and parasympathetic fibers. The renal plexus plays a crucial role in regulating renal function, including blood pressure control and electrolyte balance.
**Why the Correct Answer is Right**
The renal plexus is formed by the splanchnic nerves from the thoracic and lumbar spinal cord segments (T6-L2). The sympathetic fibers from the thoracic and lumbar splanchnic nerves synapse in the renal plexus, while the parasympathetic fibers from the vagus nerve (cranial nerve X) also contribute to the renal plexus. The renal plexus then innervates the renal cortex and medulla, influencing renal blood flow, glomerular filtration rate, and electrolyte excretion.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is likely incomplete or missing. Without more information, it's difficult to assess its accuracy.
**Option B:** This option is incorrect as the renal plexus does not receive direct innervation from the vagus nerve alone. While the vagus nerve does contribute to the renal plexus, it is not the sole contributor.
**Option C:** This option is not accurate as the renal plexus does not receive direct innervation from the superior mesenteric plexus. The superior mesenteric plexus primarily innervates the abdominal viscera.
**Option D:** This option is incorrect as the renal plexus does not receive direct innervation from the inferior hypogastric plexus. The inferior hypogastric plexus primarily innervates the pelvic viscera.
**Clinical Pearl / High-Yield Fact**
The renal plexus plays a crucial role in regulating renal function, including blood pressure control and electrolyte balance. Damage to the renal plexus can lead to hypertension and electrolyte imbalances.
**Correct Answer:** C. The renal plexus receives contributions from sympathetic and parasympathic fibers.