The internal opening of the metanephridium is knows as:
Correct answer: A. Nephrostomes
- A. Nephrostomes
- B. Nephridiopore
- C. Excretory pore
- D. All (A), (B) and (C)
Explanation
Earthworm is an ideal example of another type of tubular excretory system called as metanephridium. Each segment of earthworm has a pair of metanephridia. This system has an internal ciliated opening of the nephrostome immersed in coelomic fluid and enveloped by a network of capillaries. Nephrostome collects coelomic fluid. As fluid moves along the tubule, epithelium reabsorbs salt from the lumen and sends to blood vessels surrounding the nephridium. The left over appears as urine containing nitrogenous waste.
Last updated
About Homeostasis
Homeostasis maintains a stable internal environment through the kidney and urinary system, thermoregulation and excretion. The kidney topics include filtration, selective reabsorption, urine formation and water balance, while thermoregulation involves sweating, vasodilation, vasoconstriction and hormonal control; excretion is different from egestion, which removes undigested food.
Practise Homeostasis
698 free Homeostasis MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Biology questions like this
Biology is on 6 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
A biological defense of our body with greater speed and effectiveness is called:
A capillary tuft from which fluid leaves the circulatory system:
A cell is placed in a solution and it swells. This solution is _
A cell is placed in a solution and swells. This solution is:
A cell whose internal salt concentration is 0.3 /liter is placed in a solution having salt concentration 0.5/liter. The solution is _