Questions and Answers
What are segmental arteries?
What do interlobar arteries ascend towards?
the cortex
What do arcuate arteries branch from?
interlobar arteries
Cortical radiate arteries branch off arcuate arteries and ascend into the ______.
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What do afferent arterioles provide to capillary networks?
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What is the starting point of the blood flow to the kidneys?
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What is the last stop of the blood flow from the kidneys?
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What do ureters carry from the kidneys?
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What drains urine from the bladder?
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What is the triangular area of the urinary bladder called?
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What is the medical term for urination?
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What type of muscle is the internal urethral sphincter made of?
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What type of muscle is the external urethral sphincter made of?
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Study Notes
Blood Flow in the Kidney
- Segmental Arteries: Branch from the renal artery and enter the hilum of the kidney.
- Interlobar Arteries: Arise from segmental arteries, ascend through renal columns towards the cortex, and branch into arcuate arteries at the apex of the medullary region.
- Arcuate Arteries: Formed by the branching of interlobar arteries, these arteries run along the boundary between the cortex and medulla.
- Cortical Radiate Arteries: Branch from arcuate arteries and ascend into the renal cortex, leading to afferent arterioles that supply blood to capillary networks and nephrons.
- Afferent Arterioles: Subdivisions of cortical radiate arteries that directly supply blood to the nephrons for filtration.
Components of the Urinary System
- Renal Artery: Initial blood supply source to the kidneys, responsible for delivering oxygenated blood.
- Renal Vein: Final destination for deoxygenated blood, carries filtered blood away from the kidneys.
- Ureters: Muscular tubes transporting urine from kidneys to the urinary bladder.
- Urethra: Carries urine from the bladder to the outside of the body, facilitating urination.
- Trigone: Triangular region in the bladder marked by the openings of two ureters and the urethra, important for urinary storage and exit.
Urination Process
- Micturition: Medical term for the act of urination, indicating the body's process of expelling urine.
- Internal Urethral Sphincter: Smooth muscle located at the base of the urinary bladder, controls the release of urine involuntarily.
- External Urethral Sphincter: Skeletal muscle situated near the external urethral orifice, allowing voluntary control over urination.
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Description
This quiz focuses on the blood flow in the kidney, highlighting key components such as segmental arteries, interlobar arteries, and arcuate arteries. Test your knowledge of the anatomy and function of the renal vascular system. Perfect for students studying the urinary system!
