Practice free Zoology NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Sebaceous glands eliminate which of the following substances through sebum?
As per the NCERT, 'Sebaceous glands eliminate certain substances like sterols, hydrocarbons and waxes through sebum.'
The oily covering provided by sebum on the skin has what primary role?
The NCERT states, 'This secretion provides a protective oily covering for the skin.'
How much carbon dioxide is removed by the lungs per minute approximately?
The NCERT text specifies, 'Our lungs remove large amounts of CO$_2$ (approximately 200mL/minute) and also significant quantities of water every day.'
Which of the following describes the role of the liver in excretion related to nitrogenous wastes for ureotelic animals?
The NCERT states, '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.' This highlights the role of the liver in converting ammonia to urea for excretion in ureotelic animals.
Which of the following substances, if present in liver secretions, contributes to the color of feces?
Bilirubin and biliverdin are bile pigments produced from the breakdown of hemoglobin, and their excretion via bile gives feces its characteristic brown color. The NCERT mentions, 'Liver...secretes bile-containing substances like bilirubin, biliverdin...Most of these substances ultimately pass out alongwith digestive wastes.'
Apart from excretory waste, sweat also contains small amounts of:
The NCERT states, 'Sweat produced by the sweat glands is a watery fluid containing NaCl, small amounts of urea, lactic acid, etc.'
What is the largest gland in the human body that plays a role in excretion?
The NCERT mentions, 'Liver, the largest gland in our body, secretes bile-containing substances like bilirubin, biliverdin, cholesterol, degraded steroid hormones, vitamins and drugs.'
The secretion of sebaceous glands provides a protective oily covering for the skin. This substance is called:
The NCERT states, 'Sebaceous glands eliminate certain substances like sterols, hydrocarbons and waxes through sebum. This secretion provides a protective oily covering for the skin.'
Which of the following describes the characteristic of acquired immunity that differentiates it from innate immunity?
As per NCERT, 'Acquired immunity, on the other hand is pathogen specific. It is characterised by memory.' This clearly distinguishes it from innate immunity which is non-specific.
What is the term for the initial, low-intensity immune response observed when the body first encounters a pathogen?
NCERT states, 'This means when our body encounters a pathogen for the first time it produces a response called primary response which is of low intensity.'
Ready to ace NEET?
Free access · No credit card required
Yes. You can attempt every Zoology question on this page for free without logging in, and check the correct answer with a detailed explanation instantly.
No account is required to attempt questions and view answers. A free account adds bookmarks, personal notes, and progress tracking.
The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.