Tag: thymus and adrenal gland

Questions Related to thymus and adrenal gland

Adrenal gland is associated with

zoology the endocrine system adrenal gland thymus and adrenal gland adrenal glands

  1. Pharynx

  2. Pancreas

  3. Kidney

  4. Brain

Show answer
Correct Option: C
Explanation:
A. Pharynx is a part of alimentary canal that connects nose and mouth to the oesophagus.
B. Pancreas is a heterocrine gland as it acts both as endocrine and exocrine gland. It secretes insulin hormone into blood and act as endocrine gland and when it secretes digestive enzymes and juice through pancreatic duct, it acts as exocrine gland.
C. Kidneys are the bean shaped paired organs present I the abdominal cavity. Each kidney has an adrenal gland on its upper region. Adrenal gland is composed of adrenal cortex and adrenal medulla.
D. Brain is the central organ of nervous system.
Hence, adrenal glands are associated with kidneys. 
So, the correct answer is 'Kidney'.

In urinary, system, aldosterone takes part in retention (reabsorption) of

zoology the endocrine system adrenal gland thymus and adrenal gland adrenal glands

  1. $Ca^{2+}$

  2. $ K^+$

  3. $Na^+$

  4. Water

Show answer
Correct Option: C
Explanation:

In urinary, system, aldosterone takes part in retention of sodium ions. The ADH released by posterior pituitary triggers the release of aldosterone which increases the concentration of sodium ions in the blood. The increased salt concentration in the blood increases the blood osmotic potential which further increases reabsorption of water and incraeses the blood volume and blood pressure.

So, the correct answer is 'Na$^+$'.

Find out the correct layers in T.S. of adrenal gland.

zoology the endocrine system adrenal gland thymus and adrenal gland adrenal glands

  1. Medulla, Zona fasciculata, Zona reticularis, Zona glomerulosa

  2. Zona glomerulosa, Medulla, Zona reticularis, Zona fasciculata

  3. Zona glomerulosa, Zona fasciculata, Zona reticularis, Medulla

  4. Zona reticularis, Zona fasciculata, Zona glomerulosa, Medulla

Show answer
Correct Option: C
Explanation:
Adrenal glands are paired glands located at the anterior part of the kidneys. It is composed of two types of tissues, adrenal cortex and adrenal medulla. The adrenal medulla is located at the centre and the adrenal cortex lies outside the adrenal medulla. Adrenal cortex is divided into three layers - zona reticularis (innermost layer of the adrenal cortex), zona fasciculata (middle layer of the adrenal cortex) and zona glomerulosa (outermost layer of the adrenal cortex). The correct layers in T.S of adrenal gland is zona glomerulosa, zona fasciculata, zona reticularis and medulla.
So, the correct answer is 'zona glomerulosa, zona fasciculata, zona reticularis and medulla'.

Injury to adrenal cortex is not likely to affect secretion of

zoology the endocrine system adrenal gland thymus and adrenal gland adrenal glands

  1. Andlostenedione and dehydroepian-drosterone

  2. Adrenaline

  3. Cortisol

  4. Aldosterone

Show answer
Correct Option: B
Explanation:
Adrenaline is secreted from adrenal medulla in response to stress conditions in the body. Androstenedione and dehydroepiandrosterone (form of androgens), cortisol and aldosterone are corticoid hormones secreted by adrenal cortex. They are steroid hormones that regulate water balance and electrolyte balance in the body. Adrenal cortex secretes glucocorticoids (cortisol), mineralocorticoids (aldosterone) and sexocorticoids (androgens).   
So, the correct answer is 'Adrenaline'.

Adrenal gland is derived from

zoology the endocrine system adrenal gland thymus and adrenal gland adrenal glands

  1. Endoderm

  2. Ectoderm

  3. Mesoderm

  4. Ectoderm and mesoderm

Show answer
Correct Option: D
Explanation:
During embryonic stages, three germ layers are formed which give rise to various organs of foetus. The three germ layers are:
  • Outer layer ectoderm
  • Middle layer mesoderm
  • Inner layer endoderm
Adrenal gland has two parts, adrenal cortex and adrenal medulla.
Adrenal cortex is derived from mesoderm and adrenal medulla is derived from ectoderm.
So, the correct answer is 'Ectoderm and mesoderm'.

Which of the following is the hormone secreted by zona fasciculate?

zoology the endocrine system adrenal gland thymus and adrenal gland adrenal glands

  1. Aldosterone

  2. Cortisol

  3. Androstenedione

  4. Mineralocoricoids

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Correct Option: A

Hormone controlling Na$^+$ - K$^+$ ion concentration is 

zoology the endocrine system adrenal gland thymus and adrenal gland adrenal glands

  1. Aldosterone

  2. Antidiuretic hormone

  3. Progesterone

  4. Pitocin

Show answer
Correct Option: A
Explanation:
A. Aldosterone is a mineralocorticoid hormone secreted from the adrenal cortex. It maintains the electrolyte balance in the body by reducing the loss of sodium through urine and sweat. Hence, it controls Na⁺ - K⁺ ion concentration.
B. Anti diuretic hormone (ADH), is secreted from the posterior part of pituitary gland. This hormone increases reabsorption of water in kidneys and this results in decreased rate of urine production.
C. Progesterone is a steroid female sex hormone which is also known as pregnancy hormone. It maintains the inner lining of uterus which aids in implantation of embryo in the uterus. 
D. Pitocin is synthetic form of oxytocin. Oxytocin is secreted from the posterior pituitary and helps in the contraction of uterus during childbirth and also stimulates release of milk from mammary glands i.e. lactation.
So, the correct answer is 'Aldosterone'.

Which of the following leads to the secretion of Aldosterone from the Adrenal cortex?

zoology the endocrine system adrenal gland thymus and adrenal gland adrenal glands

  1. Chymotrypsin

  2. Trypsin

  3. Renin

  4. Rennin

Show answer
Correct Option: A

The tube that passes out of the Hilus is called ___________.

zoology the endocrine system adrenal gland thymus and adrenal gland adrenal glands

  1. Medulla

  2. Pelvis

  3. Ureter

  4. Collecting duct

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Correct Option: A

The fight-or-flight response is developed by the hormones of

zoology the endocrine system adrenal gland thymus and adrenal gland adrenal glands

  1. hypothalamus

  2. middle pituitary

  3. adrenal medulla

  4. adrenal cortex

Show answer
Correct Option: C
Explanation:

The adrenal medulla secretes two hormones called adrenaline or epinephrine and noradrenaline or norepinephrine. These are commonly called as catecholamines. Adrenaline and noradrenaline are rapidly secreted in response to the stress of any kind and during emergency situations and are called emergency hormones or hormones of Fight or Flight.

So the correct option is adrenal medulla.