Tag: excretion to maintain homeostasis

Questions Related to excretion to maintain homeostasis

Terrestrial animals must

zoology excretion to maintain homeostasis other excretory organ role of other organs in excretion accessory excretory organs excretion in other organisms

  1. Excrete large amounts of urine

  2. Conserve water

  3. Actively pump out salts through skin

  4. Excrete large amount of salts in urine

Show answer
Correct Option: B
Explanation:

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.


So, the correct answer is 'Conserve water'.

Which of the following organs synthesizes urea?

zoology excretion to maintain homeostasis other excretory organ role of other organs in excretion accessory excretory organs excretion in other organisms

  1. Duodenum

  2. Kidney

  3. Liver

  4. Pancreas

Show answer
Correct Option: C
Explanation:

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

zoology excretion to maintain homeostasis other excretory organ role of other organs in excretion accessory excretory organs excretion in other organisms

  1. Skin

  2. Skin and liver

  3. Skin and lungs

  4. Skin, lungs, liver and intestine

Show answer
Correct Option: D
Explanation:

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
So, the correct option is 'Skin, lungs, liver and intestine'.

Ureotelic organisms like mammals excrete urea in their urine, that is formed in

zoology excretion to maintain homeostasis other excretory organ role of other organs in excretion accessory excretory organs excretion in other organisms

  1. spleen

  2. kidney

  3. liver

  4. gall bladder

Show answer
Correct Option: C
Explanation:

(A) Spleen - Primarily acts as blood filter. 

(B) Kidney - Kidneys are two bean-shaped organs in the renal system. They help the body pass waste as urine. They also help filter blood before sending it back to the heart. 
(C) Liver - Mammals, many terrestrial amphibians and marine fishes mainly excrete urea and are called ureotelic animals. Ammonia produced by metabolism is converted into urea in the liver of these animals and released into the blood which is filtered and excreted out by the kidneys.
(D) Gall bladder - The bile secreted by the hepatic cells passes through the hepatic ducts and is stored and concentrated in a thin muscular sac called the gall bladder. 
So the correct option is Liver. 

Which of the following is not a nitrogenous waste; that must be excreted from the body?

zoology excretion to maintain homeostasis other excretory organ role of other organs in excretion accessory excretory organs excretion in other organisms

  1. Uric acid

  2. Faeces

  3. Urea

  4. Ammonia

Show answer
Correct Option: B
Explanation:

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. 

So the correct option is feaces. 

Choose the correct answers from the following given.
In which of the following human structures are you least apt to find urine?

zoology excretion to maintain homeostasis other excretory organ role of other organs in excretion accessory excretory organs excretion in other organisms

  1. Large intestine

  2. Urethra

  3. Ureter

  4. Bladder

Show answer
Correct Option: A
Explanation:

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).

So the correct answer is large intestine.

Epidermal glands originate from ........... layer.

zoology excretion to maintain homeostasis other excretory organ role of other organs in excretion accessory excretory organs excretion in other organisms

  1. Stratum granulosum

  2. Stratum corneum

  3. Stratum lucidum

  4. Stratum malpighii

Show answer
Correct Option: D
Explanation:

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?

zoology excretion to maintain homeostasis other excretory organ role of other organs in excretion accessory excretory organs excretion in other organisms

  1. Sweat- temperature regulation

  2. Saliva- sense of food taste

  3. Sebum- sexual attraction

  4. Humerus- hind leg

Show answer
Correct Option: A
Explanation:

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 of the following is correct with reference to haemodialysis? 

zoology excretion to maintain homeostasis haemodialysis kidney dialysis kidney disorders

  1. Absorbs and resends excess of ions.

  2. The dialysis unit has a coiled cellophone tube

  3. Blood is pumped back through suitable artery after haemodialysis

  4. Nitrogenous wastes are removed by active.

Show answer
Correct Option: B
Explanation:
Haemodialysis is done in the patients whose kidneys become completely non-functional. Haemodialysis is the process of diffusion across a semipermeable membrane to remove unwanted substances from the blood while adding derivable components. The dialysis unit consists of a coiled cellophane tube kept it the dialysing fluid. The membrane of the tube is impermeable to blood cells and proteins but permeable to urea, uric acid, creatinine and mineral ions.

So, the correct answer is 'The dialysis unit has a coiled cellophone tube'.

Dialysing unit (artificial kidney) contains a fluid which is almost same as plasma except that it has 

zoology excretion to maintain homeostasis haemodialysis kidney dialysis kidney disorders

  1. High glucose

  2. High urea

  3. No urea

  4. High uric acid

Show answer
Correct Option: C
Explanation:

Artificial kidney (Dialysing unit ) is a machine that is used for filtration of blood in the people whose kidneys are failed or damaged by the process called Dialysis.

Dialysis fluid is produced by the blending of treated water with electrolytes at the patient's bedside. The composition of the dialysis fluid should match that of plasma except for the nitrogenous waste (urea). 

So the answer is 'No urea'.