Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

Multiple choice biology excretion - the wastage disposing system introduction to excretory system structures and functions related to the excretory system introduction to excretion

Select the option that correctly matches a characteristics feature with the group of three animals.

  1. Excretion through Malpighian tubules - Limulus, Loligo, Locusta

  2. Parapodia help in swimmming - Neries, Pheretima, Hirudinaria

  3. Rasping organ called radula - Pila, Octopus, Sepia

  4. Comb plates for locomotion - Pleurobrachia, Pennatula, Ctenoplana
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
The phylum Mollusca animals have a file-like rasping organ called radula that helps in feeding.
(A) Malpighian tubules are the excretory organs present in terrestrial arthropods and are responsible for maintaining the ionic and osmotic balance. These tubules remove the waste from the hemolymph and the final excretion occurs in the rectum. Loligo is a mollusc.
(B) Parapodia help in swimming in aquatic annelids. Pheretima is not aquatic.
(C) In phylum Mollusca, Class Cephalopoda has a file-like structure called radula which helps in feeding. Pila, Octopus, Sepia have the radula.
(D) Phylum Ctenophora animals have eight rows of ciliated comb-plates that help in locomotion. Pennatula is a Cnidarian. 
Hence, the correct answer is 'Rasping organ called radula- Pila, Octopus, Sepia'.
Multiple choice biology excretion - the wastage disposing system introduction to excretory system structures and functions related to the excretory system introduction to excretion

Which one of the following is correctly matched?

  1. Wings of honey bee and crow - Homologous

  2. Thorn of Bougainvillea and tendrils of Cucurbita - Analogous

  3. Nephridia of earthworm and malphighian tubules of cockroach - Excretory

  4. Nictitating membrane and blindspot in human eye - Vestigial
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Homologous organs are the organ which has the same origin but performs different functions. Wings of honey bee and crow are the analogous as they perform the same function. Where thorn of Bougainvillea and tendrils of Cucurbita are the homologous organs. Nictitating membrane is the vestigial organ of the human eye but not the blind spot. Whereas nephridia is the excretory organ of earthworm and malpighian tubule of the cockroach. Thus, the correct answer is option C.

Multiple choice biology breath and blood of life human respiration the mechanism of breathing breathing and its movements

Which of the following option is correct regarding the characteristics of the diaphragm?


(A) Found in mammals.
(B) Separate the thoracic and Abdominal cavity.
(C) Formed by inter-costal muscles.
(D) Due to its contraction volume of thoracic cavity increases on Anterior-Posterior axis.

  1. A, C and D are correct

  2. A, B and D are correct

  3. B, C and D are incorrect

  4. A, B and C are incorrect
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • The diaphragm is the type of skeletal muscle found in mammals which plays a major role in respiration. It is a dome-shaped structure and moves in and out at the time of respiration. Its muscles separate the thoracic cavity having heart and lungs from the abdominal cavity. 
  • During inhalation, the diaphragm contracts and chest cavity increases to get more oxygen while in exhalation diaphragm relaxes and the chest cavity decreases and releases carbon dioxide.

So, the correct option is 'Found in mammals, Separate the thoracic and Abdominal cavity, and Due to its contraction volume of the thoracic cavity increases on Anterior-Posterior axis'.

Multiple choice biology breath and blood of life human respiration the mechanism of breathing breathing and its movements

Which of the following changes occur in diaphargm relax and intercostal muscles when expiration of air takes place?

  1. External intercostal muscles relax and diaphargm contracts

  2. External intercostal muscles contract and diaphargm relax.

  3. External intercostal muscles contract and diaphargm relaxes

  4. External intercostal muscles and diaphargm contract
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice biology breath and blood of life human respiration the mechanism of breathing breathing and its movements

One of the following depend more on ribs and their muscles for breathing than diaphragm.

  1. Female (human)

  2. Monkey

  3. Kangaroo

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

The ribs and the various muscles of respiration aid in both inspiration and expiration, which require changes in the pressure within the thoracic cavity. The important respiratory muscles are the diaphragm, the external intercostal and the internal intercostal muscles. The ribs and the respiratory muscles work to achieve this by changing the dimensions of the thoracic cavity.
When a person inhales, the rib cage move out and up in order to accommodate the incoming air. On the other hand, when a person exhales, the rib cage move in, in order to expel the carbon dioxide. Both the external intercostal muscles and the internal intercostal muscles elevate the ribs, thus increasing the width of the thoracic cavity, while the diaphragm contracts to increase the vertical dimensions of the thoracic cavity, and also aids in the elevation of the lower ribs. The muscles that connect the ribs together ensure that the diaphragm can expand and contract appropriately as air is breathed in and expelled. Thus, in mammals, breathing depends more on ribs and their muscles for breathing than diaphragm.

Multiple choice biology breath and blood of life human respiration the mechanism of breathing breathing and its movements

The respiratory organs in cockroach are

  1. Lungs

  2. Gills

  3. Lenticels

  4. Spiracles
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

  • Spiracles are openings on the surface of some animals, which usually lead to respiratory systems. 
  • The spiracle is a small hole behind each eye that opens to the mouth. Insects and some more derived spiders have spiracles on their exoskeletons to allow air to enter the trachea.
  •  In the respiratory system of insects, the tracheal tubes primarily deliver oxygen directly into the animals' tissues. 
  • The spiracles can be opened and closed in an efficient manner to reduce water loss. Hence, The respiratory organs in cockroach are spiracles.
So, the correct answer is 'spiracles'.

Multiple choice biology breath and blood of life human respiration the mechanism of breathing breathing and its movements

______ is the muscle responsible in respiration.

  1. Diaphragm

  2. Muscle tissue

  3. Heart

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

Diaphragm is a muscular and tendinous sheath that closes the opening between thorax and abdomen and is pierced by structures that pass between these two regions of the body. The diaphragm is the primary muscle of respiration. Diaphragm is the primary respiratory muscle of the body. It, on contraction, increases the vertical diameter of the chest cavity by pulling its central tendon downwards. In this way, the lungs get extra space to expand and air rushes into them. 

Multiple choice biology breath and blood of life human respiration the mechanism of breathing breathing and its movements

State whether the following statements are true or false.
Forceful expiration results from a forceful contraction of diaphragm.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Forced expiration is an active process. It involves contraction of the abdominal muscles which forces the diaphragm upwards reducing the volume of the thoracic cavity. 
  • It also requires contraction of the internal intercostal muscles and innermost intercostal muscles which pull the ribs downwards. Both these actions contribute to a decreased thoracic volume and pressure is inversely proportional to volume. 
  • Therefore pressure within the lungs increases forcing the air out quicker than in normal expiration.
So, the correct option is 'True'.