NEET Biology : Chemical Coordination and Integration

Assertion: Pituitary is attached to hypothalamus by a vein.

Reason: This attachment hypophysial portal vein.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

What is the effect of GnRH produced by hypothalamus?

• Stimulates the synthesis and secretion of androgens

• Stimulates secretion of milk in mammary glands

• Stimulates foetal ejection reflex

• Stimulates synthesis of carbohydrates from non- carbohydrates in liver

Assertion: Rabies is acute infectious disease of warm blooded mammals characterised by
involvement of central nervous system resulting in paralysis and finally death.

Reason: This is caused due to neurotropic filterable bacteria in saliva of rabid animals.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

Which of the following match is correct?

• Hormone	Effect
  Oxytocin	Milk ejection hormone

• Glucagon

  Decreases blood sugar level

• Adrenaline

  Decreases heart rate

• Thyroxine

  Decreases BMR

Assertion : Insulin is antagonistic to glucagon.

Reason : It is an anabolic hormone.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

Assertion : Pantothenic acid deficiency is probably the most common vitamin deficiency.

Reason : Macrocytic anaemia is a characteristic feature of pantothenic acid deficiency.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false

Assertion : Hormone calcitonin has antagonistic effect to that of parathormone.

Reason : Calcitonin decreases blood calcium level while parathormone increases blood calcium level.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false

A patient of diabetes mellitus excretes glucose in urine even when he is kept in a carbohydrate free diet. It is because

• fats are catabolised in adipose tissues to form glucose

• amino acids are catabolised in kidney to form glucose

• amino acids are discharged in blood stream from liver

• glycogen from muscles is released in blood stream.

Assertion : Adrenaline is called an emergency hormone.

Reason : It acts on the cells of skeletal, cardiac, smooth muscles, blood vessels and fat cells

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false

Which of the following statements regarding glucagon is false?

• It is secreted by $\mathrm{\alpha }$-cells of Langerhans

• It acts antagonistically to insulin

• It decreases blood sugar level

• The gland responsible for its secretion is heterocrine gland.