Role of other organs in excretion - class-X
Description: role of other organs in excretion | |
Number of Questions: 21 | |
Created by: Blackmamba | |
Tags: zoology excretory products and their elimination excretion - the wastage disposing system organs systems in animals excretion in humans excretory products and elimination human system excretion to maintain homeostasis biology excretory system of human excretion |
Which of the following waste can be removed by skin?
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(i) only
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(i), (ii), and (iii)
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(i), (iii)
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All of the above
Select the correct match
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Human- kidney, sebaceous glands, tear glands
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Earth worm- pharyngeal, integumentary, septal nephridia
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Cockroach- malphigian tubules, enteric caeca
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Frog- kidney, skin, buccal epithelium
The skin is the main excretory organ.
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True
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False
The statement "skin is the main excretory organ" is incorrect because in all chordates kidneys act as main excretory organ.
Wharton's duct is part of _________ gland.
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Parotid
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Submaxillary
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Sublingual
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Brunner's
The submaxillary duct is also known as the Wharton's duct opens into the floor of the mouth. They are the major ducts of the submaxillary (submandibular gland) and help in the transfer of saliva from the submaxillary gland to the opening under the tongue.
Primary function of sweat glands is
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Thermoregulation
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Excretion
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Osmoregulation
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None of the above
Sweat glands are coiled and tubular in structure. Coiled part of this gland is called as secretory unit. Around secretory unit, myoepithelial cells are present. When they contract sweat comes out from sweat gland. This secretion is called as sweat.
Which of the following organ do not serve a role in excreting metabolic wastes?
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Skin
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Large intestine
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Lungs
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Liver
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Kidney
The skin has sweat glands that excrete perspiration (salt, water, and nitrogenous wastes) through its pores.
Which one of the following does not play a role in excretion of metabolic wastes?
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Skin
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Large intestine
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Lungs
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Liver
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Kidney
Skin serves in excretion of waste material through the process of sweating. Large intestine serves to reabsorb water and essential minerals from the undigested food and to store it till it is excreted at the anus. Lungs serve in excretion via expiration. The liver serves in the formation of urea which is then excreted by kidneys. Kidneys are the organs of urine formation. This makes option B correct answer as large intestine only stores the undigested material; it does not excrete it directly.
Which of the following applications illustrates that evaporation leads to cooling?
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Perspiration in human body
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Transpiration in leaves
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Water in earthern post
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All of the above
Evaporation or the loss of water from the body due to heat is called as perspiration. The heat present in the surrounding causes water to be lost from the body in the form of sweat through the sweat glands on the skin. The water is deposited on the surface of the organism's body leading to a cooling effect. Thus the correct answer is option A.
Skin is said to play an important role in excretion due to presence of
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Sweat glands
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Sebaceous glands
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Hair follicles
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Hair cells
Sweat glands secrete a fluid called sweat that contains water and dissolved salts of Calcium, Sodium, Magnesium etc Thus, it helps in excreting water and salts to some extent by a process called sweating or perspiration.
The elimination of insoluble calcium phosphate takes place by
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Liver
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Kidney
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Large intestine
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Skin
Terrestrial animals must
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Excrete large amounts of urine
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Conserve water
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Actively pump out salts through skin
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Excrete large amount of salts in urine
Since terrestrial animals do not have automatic access to either fresh or salt water, they must regulate water content in other ways, balancing off gains and losses.
Which of the following organs synthesizes urea?
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Duodenum
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Kidney
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Liver
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Pancreas
Ammonia which is the major form of nitrogenous waste generated in the body is converted urea in the liver and excreted through the urine by the kidneys. Thus, the correct option is C.
Accessory excretory human organ is
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Skin
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Skin and liver
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Skin and lungs
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Skin, lungs, liver and intestine
The accessory excretory organs are:-
- Skin -contains sweat glands which remove toxic salts from the body
- Liver -used for excretion of cholesterol pigment.
- Kidney -excrete toxic liquid in form of urine.
- Lungs-excrete harmful gases from body.
- Large intestine -remove undigested food material from body
Ureotelic organisms like mammals excrete urea in their urine, that is formed in
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spleen
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kidney
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liver
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gall bladder
(A) Spleen - Primarily acts as blood filter.
Which of the following is not a nitrogenous waste; that must be excreted from the body?
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Uric acid
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Faeces
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Urea
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Ammonia
Metabolic wastes are substances left over from a metabolic process which cannot be used by the organisms and must, therefore, be excreted. This includes nitrogen compounds. The nitrogen compounds through which excess nitrogen is eliminated from the organism are called nitrogenous wastes. They are ammonia, urea, uric acid, and creatinine.
Choose the correct answers from the following given.
In which of the following human structures are you least apt to find urine?
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Large intestine
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Urethra
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Ureter
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Bladder
The large intestine is the part of the digestive system. Whereas the excretory system of humans consists of two kidneys, two ureters, one urinary bladder, and one urethra. Urine is found in almost all excretory system parts(little or more).
Epidermal glands originate from ........... layer.
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Stratum granulosum
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Stratum corneum
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Stratum lucidum
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Stratum malpighii
The epidermis is composed of 4 or 5 layers depending on the region of skin being considered. The Malpighian layer (stratum malpighii) is defined as both the stratum basale and stratum spinosum. In spinous layer (stratum spinosum), keratinocytes become connected through desmosomes and start to produce lamellar bodies, from within the golgi, enriched in polar lipids, glycosphingolipids, free sterols, phospholipids and catabolic enzymes. Basal/germinal layer (stratum basale/germinativum) is composed of proliferating and non-proliferating keratinocytes, attached to the basement membrane by hemidesmosomes. Melanocytes are present, connected to numerous keratinocytes in this and other strata through dendrites. Merkel cells are also found in the stratum basale with large numbers in touch-sensitive sites such as the fingertips and lips.
Which pair among the following is correct?
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Sweat- temperature regulation
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Saliva- sense of food taste
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Sebum- sexual attraction
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Humerus- hind leg
The sweat on the surface of the skin is evaporated by the body heat. As the water is evaporated by heat released from the body, the body cools off. Each gram of water on the body surface absorbs about 0.58 calories of energy before evaporating, which is a significant source of heat loss.
Which one is not an excretory organ?
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Skin
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Kidneys
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Intestine
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Liver
In humans, kidneys are the chief excretory organ, other than kidneys, lungs, liver, and skin also help in the elimination of excretory wastes. Lungs remove a large amount of carbon dioxide and the significant amount of water every day. The liver secretes bile containing substances like bilirubin, biliverdin, degraded steroid hormones, vitamins. Most of these substances pass along with digestive wastes. Skin contains sweat glands through which NaCl, the small amount of urea, lactic acid etc are secreted. The intestine is not an excretory organ but it is a digestive organ.
Which of the following passage way is part of cloaca of vertebrates?
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Rectum
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The reproductive tract
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The urinary tract
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All of the above
Cloaca is the posterior opening that serves as the only opening for the intestinal, reproductive and urinary tracts of all amphibians, birds, reptiles, and monotremes. They possess this orifice, from which they excrete both urine and feces, unlike most placental mammals, which possess two or three separate orifices for evacuation.
Which set is similar?
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Corpus luteum : graafian follicles
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Sebum : sweat
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Bundle of his : Pace maker
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Vita $B _7$: Niacin
Sebum is an oily secretion produced by sebaceous glands, tiny ducts adjacent to hair follicles. Sebum is secreted into the follicle, from which it spreads over the hair and skin. The main role of sebum is to waterproof the skin and hair. Sweat is a salty, watery solution produced by sweat glands, numerous microscopic channels opening onto the skin surface. As sebum and sweat mix up on the skin surface, they form a protective layer often referred to as the acid mantle . Acid mantle has a particular level of acidity characterized by pH from about 4 to 5.5. A pH of 7 is considered neutral, above 7 is alkaline, and below is acidic.