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Chemical and Nervous Coordination

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Starting from the top and moving towards the bottom, which of the following is the correct sequence of glands in a human body?

  1. Pituitary gland, Thyroid gland, Thymus gland, Pancreas, Adrenal gland

  2. Pituitary gland, Thyroid gland, Thymus gland, Adrenal gland, Pancreas

  3. Pituitary gland, Thymus gland, Thyroid gland, Adrenal gland, Pancreas

  4. Thyroid gland, Pituitary gland, Thymus gland, Pancreas, Adrenal gland

  5. Pancreas, Thyroid gland, Thymus gland, Adrenal gland, Pituitary gland


Correct Option: B
Explanation:

Yes, it is the correct answer. The correct sequence of glands in a human body from top to bottom is - Pituitary gland, Thyroid gland, Thymus gland, Adrenal gland, and Pancreas.

Which of the following statements regarding pituitary gland is incorrect?

  1. It is divided anatomically into an adenohypophysis and a neurohypophysis.

  2. The pars distalis region of the pituitary, produces many hormones.

  3. Adenohypophysis consists of two portions, pars distalis and pars intermedia.

  4. Melanocyte and prolactin are secreted by Pars intermedia.

  5. The pars distalis region of the pituitary is commonly called the anterior pituitary.


Correct Option: D
Explanation:

This is the incorrect statement and hence, the correct answer. Pars intermedia secretes only one hormone, i.e. melanocyte.

Which of the following statements is/are incorrect about hormones? (a) They are the secretion of the endocrine glands. (b) They are nutrient chemicals. (c) They are intercellular messengers. (d) They are produced in sufficient amount.

  1. a and b

  2. b and d

  3. c and d

  4. a, b and d

  5. a, b and c


Correct Option: B
Explanation:

Yes, it is the correct answer as b) and d) are the incorrect statements. Hormones are non-nutrient chemicals, which are produced in trace amount.

Which of the following glands is situated in the bony cavity called sella tursica?

  1. Thymus gland

  2. Pineal gland

  3. Pituitary gland

  4. Thyroid gland

  5. Adrenal gland


Correct Option: C
Explanation:

Yes, it is located in a bony cavity called sella tursica and is attached to hypothalamus by a stalk.

Over secretion of ________ stimulates abnormal growth of the body leading to gigantism.

  1. PRL

  2. FSH

  3. LH

  4. GH

  5. TH


Correct Option: D
Explanation:

Yes, it is correct. Over secretion of GH (growth hormone) stimulates abnormal growth of the body leading to gigantism and low secretion of GH results in stunted growth resulting in pituitary dwarfism.

Which of the following abbreviations does not match correctly with its full form?

  1. TSH - Tear Sac Hormone

  2. ACTH - Adrenocorticotrophic Hormone

  3. LH - Luteinizing Hormone

  4. FSH - Follicle Stimulating Hormone

  5. PRL - Prolactin


Correct Option: A
Explanation:

It is the correct answer. The abbreviation, TSH is matched incorrectly. The correct full form is - thyroid stimulating hormone.

What are the hormones secreted by adrenal medulla commonly called?

  1. Corticoids

  2. Catecholamines

  3. Adrenaline

  4. Glucocorticoids

  5. Aldosterone


Correct Option: B
Explanation:

Yes, it is correct. The adrenal medulla secretes two hormones, these are commonly called as catecholamines.

Which of the following is a pair of peptide hormones?

  1. Glucagon and insulin

  2. Testosterone and progesterone

  3. Ghrelin and orexin

  4. Thyroid stimulating hormone and growth hormone

  5. None of these


Correct Option: A
Explanation:

Yes, it is correct, Glucagon and insulin is a pair peptide hormones.

Based on the number of axon and dendrites, the neurons are not divided into which of the following types?

  1. Unipolar

  2. Tripolar

  3. Multipolar

  4. Bipolar

  5. None of these


Correct Option: B
Explanation:

It is not a type of neuron, so this is the correct answer.

Which of the following hormones are matched correctly with their functions?

1. MSH a. Regulates pigmentation
2.Vasopressin b. Stimulates resorption of water
3. Oxytocin c. Regulates the ryhthm of our body
  1. 1, 2 and 3

  2. 2 and 3

  3. 1 and 2

  4. Only 2

  5. Only 3


Correct Option: C
Explanation:

Yes, it is correct, both 1 and 2 are correctly matched with their functions.

Which of the following statements regarding aldosterone is/ are correct? (a) They stimulate reabsorption of Na+.

(b) They stimulate reabsorption of water. (c) They stimulate reabsorption of phosphate ion. (d) They stimulate the excretion of K.

  1. a, b, and c

  2. a, b and d

  3. b and d

  4. a and b

  5. b and c


Correct Option: B
Explanation:

Yes, it is correct as only statement c is incorrect. Aldosterone acts mainly at the renal tubules and stimulates the reabsorption of Na+ and water and excretion of K+ and phosphate ions.

_____________ transmits impulses from tissues/organs to the CNS.

  1. Afferent fiber

  2. Efferent fiber

  3. Somatic nervous sytem

  4. Autonomic nervous system

  5. Dendrites


Correct Option: A
Explanation:

Yes, it is correct. The afferent nerve fiber transmits impulses from tissues/organs to the CNS.

Which of the following body parts is responsible for the maintenance of body balance?

  1. Legs

  2. Feet

  3. Ears

  4. Eyes

  5. Head


Correct Option: C
Explanation:

Yes, it is correct answer. The ears perform two sensory functions, hearing and maintenance of body balance.

In the human eye, cones possess their own characteristic photopigments that respond to a group of colours. Which of the following groups of colours represent the same?

  1. Red, green and white

  2. White, yellow and red

  3. Green, red and blue

  4. Red, blue and white

  5. Green, blue and black


Correct Option: C
Explanation:

Yes, it is correct. They respond to red, green and blue lights. The sensations of different colours are produced by various combinations of these cones and their photopigments. When these cones are stimulated equally, a sensation of white light is produced.

Which of the following statements is/are incorrect regarding 'Islets of Langerhans'? (a) The exocrine pancreas consists of 'Islet of langerhans'. (b) There are about 1 to 2 million Islets of Langerhans in a normal human pancreas. (c) The two main types of cells in the Islet of Langerhans are called α-cells and β-cells. (d) The α-cells secrete a hormone called insulin, while the β-cells secrete glucagon.

  1. a, b, and d

  2. b, c, and d

  3. only d

  4. only a

  5. a and d


Correct Option: E
Explanation:

Yes, it is correct. Statements a and d are incorrect. The endocrine pancreas consists of ‘Islets of Langerhans’. The α -cells secrete a hormone called glucagon, while the β-cells secrete insulin.

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