Multiple Choice Questions

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Posterior pituitary gland

  • produces and store hormones

  • stores 6 trophic honnones

  • stores and releases ADH and oxytocin

  • release and store growth and thyroid stimulating hormone


C.

stores and releases ADH and oxytocin

Posterior pituitary gland is the back portion of the pituitary. It is a small gland in the head called the master gland. It does not synthesize any hormone but stores and releases two hormones ADH (Antidiuretic Hormone) and Oxytocin.

Antidiuretic hormone is released in response to a fall in the water content of blood plasma and leads to an increase in the permeability to water of the distal and collective tubules of the nephron in the kidney so that water is retained in the blood plasma.

Oxytocin causes contraction of the uterus during birth and the ejection of milk from the nipple.


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Heart sound dub is caused due to closing of

  • valve

  • tricuspid valve

  • semilunar valve

  • None of the above


Gonadotrophins are secreted from

  • gonads

  • anterior pituitary

  • posterior pituitary

  • antidiuretic hormone


Cranial nerve showing maximum branching is

  • trigeminal

  • vagus

  • optic

  • facial


Earthworms are economically important for man as these are used as

  • bait for catching fish

  • food of poultry

  • medicine for gout

  • All of the above


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Heart beats originates from

  • pace maker

  • cardiac muscles

  • left atrium

  • right ventricle


The instrument used for measuring blood pressure is

  • electrocardiograph

  • X-rays

  • sphygmomanometer

  • electroencephalograph


Water vascular system is characteristic of

  • Protozoa

  • Porifera

  • Annelida

  • Echinodermata


Proximal and distal convoluted tubules are parts of a

  • nephron

  • oviduct

  • vas deferens

  • caecum


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Which of the following is a part of pectoral girdle?

  • Ilium

  • Ischium

  • Acetabulum

  • Glenoid cavity