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STD 11 - 17. Locomotion and movement — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 11 - 17. Locomotion and movement4 Marks
MCQ
Vertebral formula for human beings is
  • A
    ${C_5}{T_{12}}{L_7}{S_5}{C_{3 - 5}} = 33 - 35$
  • ✓
    ${C_7}{T_{12}}{L_5}{S_5}{C_{3 - 5}} = 33 - 35$
  • C
    ${C_5}{T_{10}}{L_5}{S_5}{C_{3 - 5}} = 33$
  • D
    ${C_7}{T_{10}}{L_5}{S_5}{C_{3 - 5}} = 33$
✓

Answer

Correct option: B.
${C_7}{T_{12}}{L_5}{S_5}{C_{3 - 5}} = 33 - 35$
b
(b) Cervical vertebrae are $7$ in number, thoracic $12$ in number, lumbar $5$ in number, sacral $5$ in number in childhood, they fuse in adults to form a single bone, the sacrum coccygeal vary from $3-5$ in number.

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Mark the given statements True (T) or False (F) :
(i) The neural system provides an organized network of point-to-point connections for quick coordination. The endocrine system provides chemical integration through hormones.
(ii) The PNS includes the brain and spinal cord and is the site of information processing and control.
(iii) The efferent nerve fibres transmit impulses from tissues/organs to the CNS and the afferent fibres transmit regulatory impulses from the CNS to the concerned tissue.
(iv) The PNS is divided into two division called somatic and autonomic neural system.
(v) The autonomic neural system is classified into sympathetic and parasympathetic neural system.
(vi) The axon of neurons contain certain granular bodies called nissl's granules.
(vii) Bipolar type of neurons are found in retina of eye which contain one axon and one dendrite.
(viii) Unmyelinated nerve fibre is enclosed by a Schwann cell that does not form a myelin sheath around the axon.
(ix) The gap between two adjacent myelin sheaths is called nodes of ranvier.
(x) At resting state, axonal membrane is comparatively more permeable to Na+ ions and nearly impermeable to K+ ions.
(xi) The sodium-potassium pump transport 2Na+ outwards and 3K+ into the cell.
(xii) The electrical potential difference across the resting plasma membrane is called as the resting potential.
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