Which of the following excretory system is partly based on the filtration of fluid under high hydrostatic pressure?
worktest questions for Unit 4
| Question | |
|---|---|
| Which group possess excretory organs known as Malpighian tubules? | C |
| Which of the following excretory systems is partly based on the filtration of fluid under high hydrostatic pressure? | C |
| Which of the following would contain blood in a normally functioning nephron? | E |
How do ADH and Raas work together in maintaining Osmoregulatory homeostasis quizlet?
ADH regulates the osmolarity of the blood by altering renal reabsorption of water, and RAAS maintains the osmolarity of the blood by stimulating Na+ reabsorption.
Which of the following is a nitrogenous waste that requires hardly any water for its excretion?
uric acid. Which nitrogenous waste requires hardly any water for its excretion? proteins and nucleic acids.
Which of the following is an advantage of excreting nitrogenous waste as urea rather than as ammonia?
African lungfish, which are often found in small, stagnant pools of fresh water, produce urea as a nitrogenous waste. What is the advantage of this adaptation? A) Urea takes less energy to synthesize than ammonia.
Which of the following organism uses only diffusion to excrete all kind of body wastes?
In unicellular organisms, since they do not have any specialized organs for the removal of waste materials, their wastes are removed directly through the cell membrane by the process of diffusion. Was this answer helpful?
What Osmoregulatory excretory system is used by freshwater flatworms?
Planaria are flatworms that live in fresh water. Their excretory system consists of two tubules connected to a highly branched duct system.
How do antidiuretic hormone ADH and the renin angiotensin aldosterone system RAAS work together in maintaining Osmoregulatory homeostasis?
ADH and the RAAS work antagonistically; ADH stimulates water reabsorption during dehydration and the RAAS causes increased excretion of water when it is in excess in body fluids.
What effect does antidiuretic hormone ADH have on the nephron?
ADH (antidiuretic hormone, also known as vasopressin) has which of the following effects on nephron function? Explanation: ADH acts upon the collecting ducts and distal convoluted tubules of nephrons to increase water reabsorption. It causes an increase in the number of aquaporins in order to allow for this.
What is nitrogen excretion?
The removal of unusable or excess nitrogen from a cell or a living organism.
What is human nitrogenous waste?
Two major nitrogenous waste products, urea and ammonium (NH(4)(+)), are produced in humans when proteins are oxidized, and in this manuscript their excretions are examined from two perspectives.
What is the advantage of excreting nitrogenous waste in the form of urea?
An advantage of excreting nitrogenous wastes in the form of uric acid that. uric acid can be excreted in almost solid form. formation of uric acid requires a least amount of energy. it is the first metabolic breakdown product of acids.
What is human excretory system?
Human excretory system includes organs that facilitate the removal of nitrogenous wastes from the body. The main excretory organs include kidney, ureter, urinary bladder and urethra. Kidneys filter the blood and urine is the filtrate obtained.
What is meant by excretion name two products excreted by trees?
Carbon dioxide, excess water produced during respiration and nitrogenous compounds produced during protein metabolism are the major excretory products in plants. Plants produce two gaseous waste products i.e. oxygen during photosynthesis and carbon dioxide during respiration.
What are osmoconformers and Osmoregulators?
Osmoconformers change their body fluid osmolarity to match the concentration of the medium. Most of the marine invertebrates are osmoconformers. Osmoregulators: Osmoregulators maintain the osmolarity of body fluids despite changes in the medium.
What is flatworm osmoregulation?
FLATWORMS: TURBELLARIA AND NEMERTEA Osmoregulation is an ecologically important function in nemerteans as in all other freshwater invertebrates with permeable body walls. It is controlled by the cerebral organs and involves several organs and enzymatic systems associated with blood vessels (Moore and Gibson, 1985).
How does ADH and RAAS work together?
ADH (Antidiuretic hormone) and RAAS (Renin Angiotensin Aldosterone System) work in response to low blood volume and low blood pressure. ADH increases the reabsorption of water in the distal convoluted tubule and collecting duct, and thus results in an increase in blood volume and blood pressure.
How does ADH control osmoregulation in human kidney?
It is released by the posterior part of the pituitary gland and also known as vasopressin. It mainly increases the permeability of distal convoluted tubule (DCT) and collecting duct (CD) due to which reabsorption of water increases and maintains osmoregulation in human kidney.
What is ADH and aldosterone?
ADH is a hormone that consists of amino acids, while aldosterone is in a class of steroid hormones that regulate water and salts balance. ADH makes the tubules more permeable to water, thus increasing the water permeability of these tubules, while aldosterone makes them more permeable to sodium ions.
What is the role of ADH?
Antidiuretic hormone (ADH) is a chemical produced in the brain that causes the kidneys to release less water, decreasing the amount of urine produced. A high ADH level causes the body to produce less urine. A low level results in greater urine production.
Which animal excretes ammonia?
aquatic amphibians Totally aquatic amphibians, such as Xenopus and nearly all larvae, excrete ammonia. At metamorphosis, the larvae of most species switch from excreting ammonia to excreting urea.
What animals pee ammonia?
Generally, aquatic animals excrete mostly ammonia, whereas terrestrial animals excrete either urea or uric acid. Ammonia, urea and uric acid are transported across cell membranes by different mechanisms corresponding to their different chemical properties in solution.
What is Ureotelism?
What Is Ureotelism? The elimination of urea from an organism is termed as Ureotelism, and the animals that excrete their wastes majorly in various forms of nitrogen such as urea are called Ureotelic animals. Excretion in our body occurs through skin, kidneys, and lungs. They excrete toxic substances.
Is urea a urine?
Urea (also known as carbamide) is a waste product of many living organisms, and is the major organic component of human urine.
How are animals Categorised on the basis of their nitrogenous waste products Why do the birds not excrete the same nitrogenous waste as the fishes?
Answer: Nitrogenous wastes in the body tend to form toxic ammonia, which must be excreted. Mammals such as humans excrete urea, while birds, reptiles, and some terrestrial invertebrates produce uric acid as waste.
Why some amount of urea is retained in the kidney matrix of ureotelic animals?
<br> (c) Some amount of urea may be retained in the kidney matrix of some of the ureotelic animals to maintain a desired osmolarity.
What excretory means?
( (ek-skruh-tawr-ee) ) The systems that excrete wastes from the body. For example, the system of organs that regulates the amount of water in the body and filters and eliminates from the blood the wastes produced by metabolism.
How is Pee made?
The nephrons of the kidneys process blood and create urine through a process of filtration, reabsorption, and secretion. Urine is about 95% water and 5% waste products. Nitrogenous wastes excreted in urine include urea, creatinine, ammonia, and uric acid.
Do trees poo?
So as long as you think of pooping in general terms, plants do it! They also do things like breathing, sweating, peeing, and even farting.
Do plants undergo excretion explain the various methods of excretion in plants with examples?
Plants also secrete waste in the form of gum and resins from their stem and branches. Therefore, various methods used by plants to get rid of their waste products are: Gaseous waste through stomata and lenticels. Stored solid and liquid waste by shedding leaves, peeling of bark and falling of fruits.
Are humans osmoconformers or Osmoregulators?
Humans are osmoregulators. This means we are able to actively control the salt concentrations irrespective of the salt concentrations in an environment. Other animals which exhibit osmoregulation includes freshwater fish such as rohu.