The urinary system contributes to homeostasis through several roles which include: (Select all that apply)
Final synthesis step of vitamin K production
Filters the blood, removing wastes
Regulates the pH of the body
Excretion of wastes
Correct Answer : B,C,D
A. Final synthesis step of vitamin K production: The final (and major) synthesis of vitamin K is by gut bacteria and liver processes; the urinary system (kidneys) is not the final synthesis site for vitamin K .
B. Filters the blood, removing wastes: The kidneys filter blood plasma (glomerular filtration) to remove metabolic wastes and excess substances .
C. Regulates the pH of the body: The kidneys conserve or excrete H⁺ and bicarbonate and so play a central role in acid–base balance .
D. Excretion of wastes: By forming urine and eliminating nitrogenous wastes and excess electrolytes/fluid, the urinary system excretes metabolic wastes .
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Related Questions
Correct Answer is B
Explanation
A. Enzymes:Enzymes (salivary, gastric, pancreatic, brush-border) mediate chemical digestion by breaking down macromolecules -not mechanical digestion.
B. Peristalsis:Peristalsis is a muscular movement that propels and helps mechanically mix food; it is a form of mechanical digestion/transport.
C. Gastric Juice: Gastric juice (HCl, pepsinogen) contributes to chemical digestion and acidic breakdown of proteins, not mechanical breakdown.
D. Hydrochloric acid: HCl denatures proteins and activates pepsinogen (chemical digestion); it is not a mechanical process.
Correct Answer is C
Explanation
C- Ascending colon: The ascending colon is the right-sided large-intestine segment that ascends from the cecum to the hepatic (right colic) flexure; on a standard abdominal/colonic diagram the ascending colon is vertical on the right side and shows haustral markings.
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