Which of the following is the anatomical structure of the kidney located immediately before the ureter?
Minor calyx
Renal pyramid
Major calyx
Renal pelvis
The Correct Answer is D
A. The minor calyx collects urine from the renal papillae (tips of the renal pyramids), but it is not the structure immediately before the ureter. It connects to the major calyx.
B. Renal pyramids are structures within the kidney that contain the renal tubules and are involved in the filtration and excretion process. However, they do not directly connect to the ureter.
C. The major calyx is a larger collecting area formed by the union of several minor calyces. It channels urine into the renal pelvis but is not directly before the ureter.
D. The renal pelvis is the funnel-shaped structure that collects urine from the major calyces and funnels it into the ureter. It is the anatomical structure immediately before the ureter, which then carries urine to the bladder.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. When the inspiratory muscles contract, the length of the thoracic cavity actually increases, not decreases, as the diaphragm moves downward and the ribs expand.
B. When the diaphragm contracts (during inspiration), it moves downward into the abdomen, not upward.
C. The correct action is that the contraction of the inspiratory muscles (including the diaphragm and external intercostals) increases the diameter of the thoracic cavity, allowing for the expansion of the lungs to draw in air.
D. The chest cavity does not compress the lungs during inspiration; rather, it allows for the lungs to expand as air is drawn in.
Correct Answer is A
Explanation
A. Myelin is a fatty substance that wraps around axons in many neurons. It acts as an insulative covering that speeds up the transmission of nerve impulses by enabling the signal to jump between gaps in the myelin (called nodes of Ranvier). This is the correct answer.
B. The synapse is the junction between two neurons where signals are transmitted. It is not involved in the insulative covering of a neuron.
C. The axon is the long, slender part of a neuron that transmits electrical signals, but it requires myelin to efficiently conduct those signals.
D. Dendrites are branched extensions of a neuron that receive signals from other neurons. They do not have an insulative function.
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