Multiple Choice
Which of the following procedures uses a device with a light attached to look inside a body cavity or organ?
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1. Introduction to Anatomy & Physiology
Introduction to Organ Systems
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Which structure of the excretory system is primarily responsible for filtration?
A
Urethra
B
Kidney
C
Ureter
D
Bladder
Verified step by step guidance1
Step 1: Understand the primary function of filtration in the excretory system. Filtration refers to the process of removing waste products, excess substances, and toxins from the blood.
Step 2: Identify the structure in the excretory system responsible for filtration. The kidney is the organ that contains specialized structures called nephrons, which perform filtration.
Step 3: Learn about the role of nephrons in the kidney. Nephrons consist of the glomerulus and Bowman's capsule, where blood is filtered to form a filtrate that eventually becomes urine.
Step 4: Differentiate the roles of other structures in the excretory system. The ureter transports urine from the kidney to the bladder, the bladder stores urine, and the urethra expels urine from the body.
Step 5: Conclude that the kidney is the correct answer because it is the structure primarily responsible for filtration in the excretory system.
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