Tag: coordination in human beings- chemical control

Questions Related to coordination in human beings- chemical control

A man is suffering from abnormally low body temperature, loss of appetite and extreme thirst. His brain scan is liable to show tumour in

biology chemical messages for homeostasis hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

  1. Pons

  2. Cerebellum

  3. Medulla oblongata

  4. Hypothalamus

Show answer
Correct Option: D

Hypothalamus is not involved in

biology chemical messages for homeostasis hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

  1. Osmoregulation and thirst

  2. Temperature control

  3. Accuracy of muscular movement

  4. Sleep wake cycle

Show answer
Correct Option: C

Pituicytes are under the control of ____________.

biology chemical messages for homeostasis hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

  1. Adenohypophysis

  2. Hypothalamus

  3. Neurohypophysis

  4. Both (a) and (c)

Show answer
Correct Option: B
Explanation:

Pituicytes are the cells found in the posterior lobe of pituitary gland. The hormones, oxytocin and vasopressin released by pituicytes are actually produced by hypothalamus.

Which is not an example of homologous structure

biology chemical messages for homeostasis hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

  1. Heterodont teeth in mammals

  2. different types of vertebrates

  3. Both

  4. None

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Correct Option: D
Explanation:

Heterodont teeth and different types of vertebrates are examples of homologous structures. The structure which are different in appearance and perform different functions but have similar structure and developmental origin are called homologous organs.

Somatostatin is produced in.

biology chemical messages for homeostasis hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

  1. Adenohypophysis

  2. Neurohypophysis

  3. Pineal gland

  4. Basal part of diencephalon

Show answer
Correct Option: D
Explanation:

Somatostatin is produced from the hypothalamus(one part of the diencephalon) inhibits the pituitary gland's secretion of growth hormone and thyroid stimulating hormone. So, the correct answer is option D.

Which is correct for Vasopressin

biology chemical messages for homeostasis hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

  1. It is a long peptide in nature

  2. It is also called as Diuretic hormone

  3. It is released from hypothalamus

  4. It is released from adrenal cortex

Show answer
Correct Option: C
Explanation:

Vasopressin is produced by the hypothalamus and is stored in the posterior lobe of the pituitary. It is also called an anti-diuretic hormone (ADH), as it acts on the kidney and promotes re-absorption of water from urine. Thus ADH constantly regulates the amount of water in blood and therefore play a key role in the maintenance of blood pressure.

So the correct answer is "It is released from hypothalamus"

GnRH of hypothalamus stimulates

zoology endocrine system and chemical co-ordination hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

  1. Ovulation and maintenance of corpus luteum

  2. Secretion of androgen and development of mammary gland

  3. Contraction of uterus during parturition

  4. Ejection of milk

Show answer
Correct Option: A
Explanation:

GnRH of hypothalamus stimulates the synthesis and secretion of the two gonadotropin hormones, namely luteinizing hormone (LH) and follicle-stimulating hormone (FSH) from the anterior pituitary gland. FSH is responsible for the ovulation. It stimulates the growth of ovarian follicle and growth of eggs in the ovaries. It is also responsible for the pubertal development. Corpus luteum is formed and maintained by the LH. 

Thus, the correct answer is 'Ovulation and maintenance of corpus luteum.'

When a young child's body temperature drops, hypothalamus produces _____________ hormone.

zoology endocrine system and chemical co-ordination hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

  1. GH

  2. TSH

  3. TRH

  4. Both A and B

Show answer
Correct Option: C
Explanation:
  • The hypothalamus is the basal part of the diencephalon, forebrain.
  • When a young child's body temperature drops, the hypothalamus produces TRH( thyrotropin-releasing hormone)hormone.
  • Thyroid-releasing hormone (TRH) from the hypothalamus stimulates TSH(Thyroid stimulating hormone) from the pituitary, which stimulates thyroid hormone release from the thyroid gland.
  • Thyroid hormone causes an increase in BMR(Basal metabolic cate) and increases in BMR results in an increase in body temperature to normal.
  • Hence When a young child's body temperature drops, the hypothalamus produces TRH( thyrotropin-releasing hormone)hormone.
  • So, the correct answer is 'TRH'.

Gonadotropin releasing hormone is transferred to anterior pituitary by

zoology endocrine system and chemical co-ordination hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

  1. left coronary artery

  2. hypophysial portal artery

  3. axons of neurosecretory cells

  4. nuclei of hypothalamus

Show answer
Correct Option: B
Explanation:

Gonadotropin-releasing hormone is a hormone responsible for releasing FSH and LH  from anterior pituitary gland. It is transferred to the anterior pituitary gland by the hypophysial portal artery. 

So, the correct option is 'Hypophysial portal artery'.

Gonadotropin releasing hormone is formed by

zoology endocrine system and chemical co-ordination hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

  1. Adenohypophysis

  2. Pars intermedia

  3. Neurohypophysis

  4. Hypothalamus

Show answer
Correct Option: D
Explanation:
A. Adenohypophysis is anterior pituitary which consists of pars distalis and pars intermedia. Pars distalis produces growth hormone (GH), thyroid stimulating hormone (TSH), adrenocorticotrophic hormone (ACTH), prolactin (PRL), follicle stimulating hormone (FSH) and luteinizing hormone (LH). Pars intermedia produces melanocyte stimulating hormone (MSH).
B. Pars intermedia is part of adenohypophysis which produce melanocyte stimulating hormone (MSH).
C. Neurohypophysis is posterior pituitary stores and releases two hormones oxytocin and vasopressin.
D. Hypothalamus secrete gonadotrophin releasing hormone (GnRH) and somatostatin hormone.
So, the correct answer is 'Hypothalamus'.