ACTH controls the secretion of:

  • cortisol
  • aldosterone
  • epinephrine
  • 4 testosterone

Oxytocin helps in 

  • Ovulation

  • Lactation but not childbirth

  • Childbirth but not lactation

  • Lactation and Childbirth both

Which of the following are not steroid hormones but still do not act through second messenger system, are small, nonpolar and can be taken orally?

  • prostaglandins
  • estrogen and progesterone
  • insulin and glucagon
  • thyroid hormones (T3 and T4)

Which of the following glands secretes the hormone melatonin?

  • anterior pituitary gland.
  • melanocytes.
  • pineal gland.
  • suprachiasmatic nucleus of hypothalamus

Which of the following regulates carbohydrate, protein and lipid metabolism in a manner opposite to that of insulin?

  • Glucagon
  • Cortisol
  • Epinephrine
  • Norepinephrine

Glucocorticoids do not:

  • Stimulate gluconeogenesis
  • Cause lipolysis
  • Cause proteolysis
  • Stimulate cellular uptake and utilization of amino acids

The development of secondary sexual characters in females is primarily controlled by:

  • Estrogen
  • Progesterone
  • LH
  • FSH

Which hormone stimulates exocrine pancreas to secrete water and bicarbonate ions?

  • Gastrin
  • Cholecystokinin
  • Secretin
  • Gastric inhibitory peptide

A hormone that has intracellular receptors would be 

  • ACTH
  • ADH
  • Melatonin
  • Aldosterone

A hormone that is antagonist to the parathyroid hormone is secreted from :

  • Thyroid
  • Adrenal cortex
  • Hypothalamus
  • Parathyroid itself

The immune responses in older people are weak due to the degeneration of:

  • Thyroid
  • Pineal
  • Adrenal
  • Thymus

Which of the following endocrine glands is under the direct neural regulation of the hypothalamus?

  • Pineal
  • Thymus
  • Posterior pitutary
  • Adrenal medulla

Which of the following is true?

  • Hormones regulate cellular functions, and generally negative feedback regulates hormone levels.
  • The circulating level of a hormone is held constant through a series of positive feedback loops.
  • Both lipid-soluble hormones and water soluble hormones bind to intracellular protein receptors.
  • The ducts of endocrine organs release their contents into the bloodstream.

All the following are secreted by the anterior pituitary except:-

  • Prolactin

  • Somatotropin

  • Vasopressin

  • Gonadotropins

Identify the incorrect statement:

  • In males FSH regulates spermatogenesis
  • Thyroid gland produces T3 and thyroxine (T4) hormones
  • ACTH stimulates secretion of glucocorticoids
  • PTH is a hyperglycemic hormone

Hormones that act by interacting with intracellular include all the following except:

  • Thyroxin
  • Estrogen
  • Epinephrine
  • Cortisol 

The amino acid derivative among the following hormone is:-

  • Insulin

  • Epinephrine
  • Estradiol
  • Testosterone

Androgenic steroids in females are secreted by:

  • pineal gland
  • Testes
  • Adrenal cortex
  • Hypothalamus

Which of the following hormones does not have an intracellular receptor?

  • Estradiol
  • Thyroxin
  • Adrenocorticotrophic hormone
  • Cortisol

Hyperthyroidism [Graves' disease] is characterized by all the following except:

  • Toxic goiter

  • Exopthalmos

  • Bradycardia

  • Muscle weakness and termors

Hypersecretion of growth hormone in adults does not cause further increase in height because 

  • growth hormone becomes inactive in adults
  • epiphyseal plates close after adolescence 
  • bones loose their sensitivity to growth hormone in adults 
  • muscle fibres do not grow in size after birth 

Which of the following is a temporary endocrine gland in the human body?

  • pineal gland   

  • corpus cardiacum

  • corpus Luteum

  • corpus allatum

GnRH, a hypothalamic hormone, needed in reproduction, acts on

  • anterior pituitary gland and stimulates secretion of LH and oxytocin

  • anterior pituitary gland and stimulates secretion of LH and FSH

  • posterior pituitary gland and stimulates secretion of oxytocin and FSH

  • posterior pituitary gland and stimulates secretion of LH and relaxin

Which hormones do stimulate the production of pancreatic juice and bicarbonate?

  • Angiotensin and epinephrine

  • Gastrin and insulin

  • Cholecystokinin and secretin

  • Insulin and glucagon

Graves disease is caused due to?

  • hyposecretion of thyroid gland
  • hypersecretion of thyroid gland
  • hyposecretion of adrenal gland
  • hypersecretion of adrenal gland

Name a peptide hormone which acts mainly on hepatocytes, adipocytes and enhances cellular glucose uptake and utilisation.

  • Insulin 
  • Glucagon 
  • Secretin 
  • Gastrin 

The posterior pituitary gland is not a ‘true’ endocrine gland because.

  • it is provided with a duct

  • it only stores and releases hormones
  • it is under the regulation of hypothalamus
  • it secretes enzymes

Changes in GnRH pulse frequency in females is controlled by circulating levels of:-

  • estrogen and inhibin

  • progesterone only

  • progesterone and inhibin

  • estrogen and progesterone

Which of the following pairs of hormones are not antagonistic (having opposite effects) to each other?

  • Insulin               Thyroid hormone

  • Aldosterone       Atrial Natriuretic Factor

  • Relaxin              Inhibin

  • Parathormone   Calcitonin

Which one of the following hormones is not involved in sugar metabolism?

  • Cortisone

  • Aldosterone

  • Insulin

  • Glucagon

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Practice Zoology Quiz Questions and Answers