Which structure conducts urine from the kidney to the urinary bladder?
Ureter
Urethra
Renal column
Renal pelvis
The Correct Answer is A
The ureters are long, narrow tubes that transport urine from the kidneys to the urinary bladder. Each kidney has one ureter, which emerges from the renal pelvis (a funnel-shaped cavity in the kidney) and descends downward, passing behind the peritoneum and along the back of the abdominal cavity. The ureters then enter the bladder through small openings at the base of the bladder, where they join with the urethra, a tube that carries urine out of the body.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Lysosomes contribute to phagocytosis in white blood cells by fusing with the phagosome, which is the membrane-bound vesicle that engulfs the foreign particle or pathogen during phagocytosis. The lysosomes contain hydrolytic enzymes that can break down the engulfed material, thereby helping to destroy the invading pathogen. Additionally, lysosomes can also release reactive oxygen species and other antimicrobial molecules that further aid in the destruction of the pathogen.
Vacuoles, endoplasmic reticulum, and Golgi apparatus do not directly contribute to phagocytosis in white blood cells. Vacuoles are used for storage in cells, while the endoplasmic reticulum and Golgi apparatus are involved in protein synthesis and processing.
Correct Answer is A
Explanation
Ceruminous glands are specialized sweat glands located in the skin of the ear canal. These glands secrete a waxy substance called cerumen or ear wax. Ear wax helps to lubricate and protect the skin of the ear canal and prevent the entry of foreign particles, such as dust and insects, into the ear. It also has antibacterial properties that help to protect the ear from infection. The amount and composition of ear wax vary from person to person and can be affected by factors such as age, genetics, and environmental conditions.
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