Which of the following is normally absent from glomerular filtrate?
Correct answer: D. Plasma proteins
- A. Glucose
- B. Urea
- C. Sodium ions
- D. Plasma proteins
Explanation
The basement membrane acts as the real molecular sieve and holds back anything much larger than about 68,000 relative molecular mass, so plasma proteins and blood cells stay in the capillary while water, glucose, salts and urea pass through freely. Protein appearing in the urine therefore signals damage to the filtration membrane. Glucose is filtered but is then completely reabsorbed further along the tubule.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Kidney and Urinary System
The kidney and urinary system remove nitrogenous wastes, regulate water and ion balance, and help maintain blood pH through filtration, selective reabsorption and secretion. Questions cover nephron structure, ultrafiltration, the loop of Henle, collecting ducts, urine formation and the roles of ADH and aldosterone, while distinguishing excretion from egestion.
Practise Homeostasis
698 free Homeostasis MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Kidney and Urinary System questions
Ultrafiltration in the glomerulus is driven by
The structural and functional unit of the kidney is the
Homeostasis is best defined as
All the glucose in the filtrate is normally reabsorbed in the
A desert mammal can produce very concentrated urine because it has
Antidiuretic hormone controls the water content of the blood by