Practice free Zoology NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Intracellular receptors are primarily found in which location within the target cell?
The NCERT mentions: 'Hormone receptors present on the cell membrane of the target cells are called membrane-bound receptors and the receptors present inside the target cell are called intracellular receptors, mostly nuclear receptors (present in the nucleus).'
Considering their chemical nature, which category do insulin and glucagon belong to?
Under the section 'On the basis of their chemical nature, hormones can be divided into groups', insulin and glucagon are listed as examples of 'peptide, polypeptide, protein hormones.'
Which of the following is an example of an amino-acid derivative hormone?
The NCERT classifies hormones based on their chemical nature, stating '(iv) amino-acid derivatives (e.g., epinephrine).'
Membrane-bound receptors are typically associated with hormones that...
Membrane-bound receptors are used by hormones that generally cannot enter the cell directly due to their chemical nature (e.g., peptide, polypeptide, protein hormones like insulin, glucagon). The NCERT lists 'peptide, polypeptide, protein hormones (e.g., insulin, glucagon, pituitary hormones, hypothalamic hormones, etc.)' as examples of hormones that would typically use this mechanism.
Which of these statements accurately describes the nature of hormones?
The NCERT defines hormones as 'non-nutrient chemicals which act as intercellular messengers and are produced in trace amounts.' The neural system provides rapid but short-lived coordination, not hormones alone.
What is the primary characteristic that differentiates endocrine glands from exocrine glands?
The NCERT states, 'Endocrine glands lack ducts and are hence, called ductless glands. Their secretions are called hormones.' This distinguishes them from exocrine glands which typically have ducts and secrete substances other than hormones.
The comprehensive regulation of physiological functions in the body is achieved by the joint coordination of:
The NCERT clearly states: 'The neural system and the endocrine system jointly coordinate and regulate the physiological functions in the body.'
Trace amounts of hormones can elicit significant effects because:
Though not explicitly stated as 'why' trace amounts are effective in a single sentence, the text explains that hormones 'act as intercellular messengers and are produced in trace amounts' and 'produce their effects on target tissues by binding to specific proteins called hormone receptors... Hormone-Receptor complex formation leads to certain biochemical changes in the target tissue.' This binding and subsequent biochemical cascade allows even trace amounts to have a significant effect.
Cortisol, testosterone, estradiol, and progesterone are examples of which chemical class of hormones?
Under the classification based on chemical nature, NCERT lists '(ii) steroids (e.g., cortisol, testosterone, estradiol and progesterone).'
If a hormone binds to an intracellular receptor, the resulting hormone-receptor complex typically interacts directly with the:
The NCERT states: 'Hormones which interact with intracellular receptors (e.g., steroid hormones, iodothyronines, etc.) mostly regulate gene expression or chromosome function by the interaction of hormone-receptor complex with the genome.'
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.