Tag: endocrine system and hormone

Questions Related to endocrine system and hormone

Select the correct matching of a hormone , it's source and function.

zoology endocrine system and adolescence control of blood glucose endocrine system and hormone hormones in human reproduction

  1. Vasopressin,  posterior pituitary,  Increase loss of water through urine

  2. Norepinephrine, Adrenal medulla, Increase heartbeat, increase rate of respiration and alertness

  3. Glucagon, Beta-cells of islets of langerhans, stimulates glycogenolysis

  4. Prolactin, Posterior pituitary and mammary glands, Regulates growth and milk formation in females

Show answer
Correct Option: B
Explanation:

Vasopressin is released by the posterior lobe of the pituitary gland and it stimulates the reabsorption of water and electrolytes. 

Norepinephrine is secreted by the adrenal medulla and it increases the alertness, heartbeat and respiratory rate.
Glucagon is released by alpha cells and it increases the blood sugar level.
Prolactin is released by the anterior lobe of the pituitary gland and it helps in the regulation of mammary glands and the formation of milk in them. 
Thus, the correct answer is 'Norepinephrine, Adrenal medulla, Increase heartbeat, increase rate of respiration and alertness.'

Which of the following hormones fall under the group amino acid derivatives?

biology coordination and response control of blood glucose endocrine system and hormone hormones in human reproduction

  1. Thyroid hormones

  2. Testosterone

  3. Glucagon

  4. Epinephrine

Show answer
Correct Option: A,D
Explanation:

A.Thyroid hormones derived from the amino acid tyrosine.

B. testosterone is derived from cholesterol 

C.Glucagon is derived from proglucagon

D. Epinephrine,derived from the amino acid tyrosine, 

So, the correct answer is 'Epinephrine' and Thyroid hormone'.

Which of the following is very accurate in case of hormonal control and coordination in human body?

biology coordination and response control of blood glucose endocrine system and hormone hormones in human reproduction

  1. Response is slow and wide spread

  2. Transmission of impulse is very quick

  3. Information passes through blood and lymph

  4. Both A and C

Show answer
Correct Option: D
Explanation:

Hormonal control and coordination are carried out via transmission through blood and lymph as it serves as a media for carrying and circulating hormones. However, the transmission may not be very quick. while the response is slow and widespread.

So, the correct option is 'Both A and C'.

The activities of the gastrointestinal tract are under the control of 

biology coordination and response control of blood glucose endocrine system and hormone hormones in human reproduction

  1. Nervous system

  2. Hormones

  3. Both A and B

  4. None of these

Show answer
Correct Option: C
Explanation:

The activities of the gastrointestinal tract are under the control of the nervous system and hormones. The sight, smell and/or the presence of food in the oral cavity can stimulate the secretion of saliva. Similarly, gastric and intestinal secretions are also stimulated by neural signals. The muscular activities of different parts of the alimentary canal can also be moderated by neural mechanisms (both local and through CNS). Hormonal control of the secretion of digestive juices is carried out by local hormones produced by the gastric and intestinal mucosa.

So, the correct option is 'Both'.

When an endotherms body temperature drops below normal, cold receptors send information to the hypothalamus.

The hypothalamus will send out signals that cause

biology coordination and response control of blood glucose endocrine system and hormone hormones in human reproduction

  1. The organism to seek warmer climate.

  2. The production of brown fat in the neck.

  3. Vasodilation (widening) of blood vessels.

  4. Vasoconstriction (narrowing) of blood vessels.

Show answer
Correct Option: A
Explanation:
  • Endotherms are animals which use internally generated heat to maintain body temperature. For example, birds and mammals.
  • When an endotherms body temperature drops below normal, cold receptors send information to the hypothalamus. The hypothalamus will send out signals that cause the organism to seek a warmer climate.
  • For example, when human body temperature drops below normal, cold receptors present in our body send signals to the hypothalamus. Then the hypothalamus will send out signals that cause us to seek a warmer climate.
  • So, the correct answer is 'The organism to seek warmer climate'.

Pungent odour of faeces is due to

biology coordination and response control of blood glucose endocrine system and hormone hormones in human reproduction

  1. Indole

  2. Scatole

  3. Phenol and hydrogen sulphide

  4. All the above

Show answer
Correct Option: D

............... is able to regulate its own body temperature.

biology coordination and response control of blood glucose endocrine system and hormone hormones in human reproduction

  1. Frog

  2. Fish

  3. Snake

  4. Sparrow

  5. Turtle

Show answer
Correct Option: D
Explanation:
Sparrow is able to regulate its own body temperature. A sparrow is the only animal out of that group that is endothermic.
Endothermic animals are those that must generate their own heat to maintain their body temperature. These animals are commonly referred to as "warm-blooded." An animal that is endothermic is categorized as an endotherm, and this includes all mammals. The opposite of an endotherm is an ectotherm.

Hormones can be differentiated from neurotransmitters on the basis of the fact that

zoology endocrine system and chemical co-ordination classification of hormones endocrine system and hormone hormones and metabolism

  1. Hormones modify cellular activity

  2. Hormones are secreted into the bloodstream

  3. Hormones produce a change in animal behavior

  4. Hormones attach to receptors on the cell surface

  5. Hormones are released in response to external stimuli

Show answer
Correct Option: B
Explanation:
Neurotransmitters are the chemical messenger that is released from an axon terminal of a neuron in response to an action potential. Whereas a hormone is a long distance chemical mediator that is secreted by an endocrine gland into the blood which is transported to target cells. Thus, the correct answer is option B.

The genes, which are confined to differential region of Y chromosome

only, are called

zoology endocrine system and chemical co-ordination classification of hormones endocrine system and hormone hormones and metabolism

  1. Mutant

  2. Autosomal

  3. Holandric

  4. Completely sex-linked

Show answer
Correct Option: C
Explanation:

The genes present on the differential part of Y chromosome are passed directly from father to son and are called as Holandric genes.

Which of the following is a feature of endocrine glands?

zoology endocrine system and chemical co-ordination classification of hormones endocrine system and hormone hormones and metabolism

  1. Secrete vitamins

  2. Cease functioning after adolescence

  3. Begin functioning in adolescence

  4. Have ducts

  5. Ductless glands

Show answer
Correct Option: E
Explanation:

  • Endocrine glands are glands of the endocrine system that secrete their products, hormones, directly into the blood(ductless) rather than through a duct.
  •  The major glands of the endocrine system include the pineal gland, pituitary gland, pancreas, ovaries, testes, thyroid gland, parathyroid gland, hypothalamus and adrenal glands. Hence, Ductless gland is a feature of endocrine glands.
So, the correct answer is 'Ductless glands'.