20. A neutral atom contains A. more protons than electrons B. more electrons tha
ID: 3519842 • Letter: 2
Question
20. A neutral atom contains A. more protons than electrons B. more electrons than protons C. the same number of electrons and protons. D. only neutrons. E. None of these choices is conrect 21. The i A. protection from cancer B. production of Vitamin E C. detection of painful stimuli D. regulation of acid-base balance E. prevention of albinism. ntegumentary system has many functions, one of which is 22. The foramen magnum is a large opening in the base of the skull for the A. optic nerve. B. carotid arteries. C. internal jugular veins. D. facial and vestibulocochlear nerves. E. spinal cord. 23. The study of the structural features and functions of the cell is A. cytology B. histology C. molecular biology D. microbiology E. surface anatomy 24. A blood clot stimulating even more blood clotting is an example of A. negative feedback B. positive feedback C. neutral feedback. D. metabolism. E. There is no feedback involved.Explanation / Answer
Ans.20.
The choice is (C).
A neutral atom contains the same number of electrons and protons.
Since the number of protons and electrons are same thats why atom is neutral.
Ans.21.
The choice is (C).
Integumentary system helps in detection of painful stimuli because it has sensory receptors to detect pain.
Ans.22.
The choice is (E).
Foramen magnum is hole in occipital bone of the skull through which spinal cord pass.
Ans.23
The choice is (A)
Cytology is the study of structural features and functions of cell along with organization of organelles in cells.
Ans.24.
The choice is (B).
A blood clot stimulating more blood clotting is example of positive feedback mechanism.
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