Class 12 Biology · Chapter 4 · Test 1
Hormones and Hypothalamus
38 MCQs
37 questions · 30 min · 37 marks
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Sample questions
The first 5 of 37. Try each one, then tap to see the answer.
Question 1
A hormone is a regulatory chemical secreted into the blood or tissue fluid by a(n):
- AExocrine gland
- BEndocrine gland
- CNeuron
- DMuscle
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Answer: B
Endocrine glands secrete hormones directly into blood or tissue fluid.
Question 2
Hormones are called chemical messengers because:
- AThey show their effects only in specific target cells
- BThey are carried only by neurons
- CThey act on all cells equally
- DThey are secreted into ducts
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Answer: A
Blood carries a hormone to every cell but only its target cells respond in a specific way.
Question 3
Exocrine glands secrete their products:
- ADirectly into blood
- BInto ducts attached to them
- CInto the nucleus
- DOnly into tissue fluid
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Answer: B
Exocrine glands have ducts while endocrine glands are ductless.
Question 4
Endocrine glands are:
- ADuctless
- BDuct-bearing
- COnly found in the brain
- DNon-secretory
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Answer: A
They secrete hormones directly into blood or tissue fluid.
Question 5
Peptide and protein hormones are made of chains of:
- AFatty acids
- BAmino acids
- CNucleotides
- DSugars
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Answer: B
Peptide and protein hormones are chains of amino acids.
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