Tag: control and coordination in living organisms

Questions Related to control and coordination in living organisms

Stimulation of uterine contraction during child birth is brought by 

biology control and coordination in living organisms control of blood glucose endocrine system and hormone hormones in human reproduction testes and ovary parts of the brain kidney

  1. Adrenaline

  2. Progesterone

  3. Oxytocin

  4. Prolactin

Show answer
Correct Option: C
Explanation:

When contraction of the uterus starts, oxytocin is released, which stimulates more contractions and more oxytocin is released. In this way, contractions increase in intensity and frequency. Oxytocin causes contractions during the second and third stages of labor.

Which of the following help in communication with the other members of the same species?

biology control and coordination in living organisms control of blood glucose endocrine system and hormone hormones in human reproduction testes and ovary parts of the brain kidney

  1. Hormones

  2. Automones

  3. Pheromones

  4. Autocoids

Show answer
Correct Option: C
Explanation:

Pheromones are chemicals released by an organism into its environment enabling it to communicate with other members of its own species. It changes the behaviour of another animal of the same species (animals include insects). 

Which of the following is not a example of sex pheromone? 

biology control and coordination in living organisms control of blood glucose endocrine system and hormone hormones in human reproduction testes and ovary parts of the brain kidney

  1. Bombykol

  2. Muskone

  3. Formic acid

  4. Civetone

Show answer
Correct Option: C
Explanation:

Formic acid is the simplest carboxylic acid and occurs naturally, mostly in ant venom. 

Sex pheromones are pheromones released by an organism to attract an individual of the opposite sex, encourage them to mate with them, or perform some other function closely related with sexual reproduction. Volatile pheromones are characterized as sex pheromones and usually form a specific odour and are focused on alarm sensitivity. 
Bombykol, the sex pheromones of silkworm moths, civetone from the civet cat and muskone from the musk deer are examples of sex pheromones.

Which temporary endocrine gland forms in ovary after ovulation? 

zoology control and coordination in living organisms control of blood glucose endocrine system and hormone hormones in human reproduction testes and ovary parts of the brain kidney

  1. Corpus callosum

  2. Corpus albicans

  3. Corpus luteum

  4. Corpus striata

Show answer
Correct Option: C
Explanation:

The corpus luteum is a temporary endocrine structure in female mammals, that is involved in the production of progesterone and moderate levels of estradiol and inhibin. The corpus luteum develops from an ovarian follicle during the luteal phase of the menstrual cycle or oestrous cycle, following the release of a secondary oocyte from the follicle during ovulation. 

Which of the following is a gonadotropic hormone? 

biology control and coordination in living organisms control of blood glucose endocrine system and hormone hormones in human reproduction testes and ovary parts of the brain kidney

  1. Collip's hormone

  2. Prolactin

  3. Oxytocin

  4. Luteinizing hormone

Show answer
Correct Option: D
Explanation:

Luteinizing hormone (LH) stimulates the production of sex hormones by gonads. Since LH acts on gonads, it is known as gonadotropic hormones.  

Oxytocin stimulates strong uterine muscle contraction during childbirth and is known as the birth hormone.
Prolactin targets mammary gland to stimulate breast development and milk production after baby birth.
Parathormone is also called as Collip's hormone and serves to regulate blood calcium level. 
So, the correct answer is option D.

Abnormal condition where mammary gland of man become female like is called as 

zoology control and coordination in living organisms control of blood glucose endocrine system and hormone hormones in human reproduction testes and ovary parts of the brain kidney

  1. Gynosism

  2. Gynochorism

  3. Feminization

  4. Gynaecomastia

Show answer
Correct Option: D
Explanation:

Gynaecomastia refers to the presence of enlarged mammary glands in males like that of females and is caused by the presence of extra X chromosome in males. Gonochorism is the unisexual condition. Feminization refers to the development of female secondary sexual characters caused by hormonal changes at puberty in females. So, the correct answer is option D.

ADH responsible for reabsorption of water and reduction of urine secretion is released by 

biology control and coordination in living organisms control of blood glucose endocrine system and hormone hormones in human reproduction testes and ovary parts of the brain kidney

  1. Posterior pituitary gland

  2. Juxtaglomerular apparatus

  3. Anterior pituitary gland

  4. Hypothalamus

Show answer
Correct Option: A
Explanation:

ADH secretion is regulated by plasma osmolality. If osmolality increases it stimulates secretion of ADH which act at the collecting duct of nephron where it causes the reabsorption of only water and produces the concentrated urine.

So, the correct answer is 'Posterior pituitary gland'.

Which hormone is responsible for maintenance of pregnancy?

zoology control and coordination in living organisms control of blood glucose endocrine system and hormone hormones in human reproduction testes and ovary parts of the brain kidney

  1. HCG

  2. Progesterone

  3. Estrogen

  4. Prostaglandin

Show answer
Correct Option: B
Explanation:

Progesterone is produced from the corpus luteum, which is the small gland, that forms in the ovary after ovulation has occurred. This hormone is essential for the maintenance of pregnancy and also for the development of many symptoms during early pregnancy.

Vasopressin influences 

biology control and coordination in living organisms control of blood glucose endocrine system and hormone hormones in human reproduction testes and ovary parts of the brain kidney

  1. Electrolyte efflux

  2. Nerve excitability

  3. Water reabsorption

  4. All of the above

Show answer
Correct Option: C
Explanation:

Vasopressin, also known as antidiuretic hormone (ADH), is a neurohypophysial hormone which has two primary functions- to retain water in the body and to constrict the blood vessels. Vasopressin regulates the body's retention of water by increasing water reabsorption in the collecting ducts of the kidney nephron.

Mammalian prolactin is secreted by 

biology control and coordination in living organisms control of blood glucose endocrine system and hormone hormones in human reproduction testes and ovary parts of the brain kidney

  1. Adenohypophysis

  2. Neurohypophysis

  3. Adrenal cortex

  4. Adrenal medulla

Show answer
Correct Option: A
Explanation:

Prolactin (PRL), also known as luteotropic hormone or luteotropin, is a protein, that in humans is best known for its role in enabling female mammals to produce milk. Prolactin is a single-chain protein hormone. It is secreted by the lactotrophs in the anterior pituitary (adenohypophysis).