Practice free Zoology NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
A majority of MTPs are performed illegally by unqualified individuals, leading to what potential outcomes?
The text warns: 'One disturbing trend observed is that a majority of the MTPs are performed illegally by unqualified quacks which are not only unsafe but could be fatal too.'
Which of the following organisms exchange O2 with CO2 via simple diffusion across their entire body surface?
As per the NCERT text, 'Lower invertebrates like sponges, coelenterates, flatworms, etc., exchange O2 with CO2 by simple diffusion over their entire body surface.'
What specialized vascularized structures are primarily used for respiration by most aquatic arthropods and molluscs?
The context states: 'Special vascularised structures called gills (branchial respiration) are used by most of the aquatic arthropods and molluscs...'
Besides lungs, what other respiratory organ can amphibians like frogs utilize for gas exchange?
According to the NCERT text, 'Amphibians like frogs can respire through their moist skin (cutaneous respiration) also.' And from Structural Organisation in Animals: 'In water, skin acts as aquatic respiratory organ (cutaneous respiration). ... On land, the buccal cavity, skin and lungs act as the respiratory organs.'
Which part of the human respiratory system functions to transport atmospheric air to the alveoli, clear it from foreign particles, and humidify it?
The NCERT text states: 'The part starting with the external nostrils up to the terminal bronchioles constitute the conducting part... The conducting part transports the atmospheric air to the alveoli, clears it from foreign particles, humidifies and also brings the air to body temperature.'
The primary site for the actual diffusion of O2 and CO2 between blood and atmospheric air in humans is:
The NCERT text specifies: 'Exchange part [alveoli and their ducts] is the site of actual diffusion of O2 and CO2 between blood and atmospheric air.' Also, 'Alveoli are the primary sites of exchange of gases.'
What is the approximate range for the volume of air inspired or expired during a normal respiration (Tidal Volume) in a healthy human?
The NCERT states: 'Tidal Volume (TV): Volume of air inspired or expired during a normal respiration. It is approx. 500 mL.'
What is the volume of air remaining in the lungs even after a forcible expiration?
According to the NCERT text: 'Residual Volume (RV): Volume of air remaining in the lungs even after a forcible expiration. This averages 1100 mL to 1200 mL.'
Vital Capacity (VC) is defined as:
The NCERT defines Vital Capacity (VC) as: 'The maximum volume of air a person can breathe in after a forced expiration. This includes ERV, TV and IRV or the maximum volume of air a person can breathe out after a forced inspiration.'
What component of the diffusion membrane, key for gas exchange, is composed of a thin basement membrane supporting the squamous epithelium and the basement membrane surrounding the single layer endothelial cells of capillaries?
The NCERT states: 'The diffusion membrane is made up of three major layers... namely, the thin squamous epithelium of alveoli, the endothelium of alveolar capillaries and the basement substance (composed of a thin basement membrane supporting the squamous epithelium and the basement membrane surrounding the single layer endothelial cells of capillaries) in between them.'
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.