Tag: zoology

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Questions Related to zoology

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

Accessory excretory human organ is

  1. Skin

  2. Skin and liver

  3. Skin and lungs

  4. Skin, lungs, liver and intestine
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.
Multiple choice zoology excretion to maintain homeostasis other excretory organ role of other organs in excretion accessory excretory organs excretion in other organisms

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

  1. spleen

  2. kidney

  3. liver

  4. gall bladder
Reveal answer Fill a bubble to check yourself
C Correct answer
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. 

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

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

  1. Uric acid

  2. Faeces

  3. Urea

  4. Ammonia
Reveal answer Fill a bubble to check yourself
B Correct answer
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. 

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

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

  1. Large intestine

  2. Urethra

  3. Ureter

  4. Bladder
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

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

  1. Stratum granulosum

  2. Stratum corneum

  3. Stratum lucidum

  4. Stratum malpighii
Reveal answer Fill a bubble to check yourself
D Correct answer
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. 

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

Which pair among the following is correct?

  1. Sweat- temperature regulation

  2. Saliva- sense of food taste

  3. Sebum- sexual attraction

  4. Humerus- hind leg
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

Multiple choice zoology excretory system of human other excretory organ role of other organs in excretion accessory excretory organs

Which one is not an excretory organ?

  1. Skin

  2. Kidneys

  3. Intestine

  4. Liver
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

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.

So, the correct answer is 'Intestine'.

Multiple choice zoology excretory system of human other excretory organ role of other organs in excretion accessory excretory organs

Which of the following passage way is part of cloaca of vertebrates?

  1. Rectum

  2. The reproductive tract

  3. The urinary tract

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

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.

Multiple choice zoology excretory system of human other excretory organ role of other organs in excretion accessory excretory organs

Which set is similar?

  1. Corpus luteum : graafian follicles

  2. Sebum : sweat

  3. Bundle of his : Pace maker
  4. Vita $B _7$: Niacin
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

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. 


So, the correct option is 'Sebum : Sweat'.