Tag: testes and ovary

Quizzes (0) Questions (106)

Questions Related to testes and ovary

Multiple choice 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

Oxytocin is involved in

  1. Milk ejection

  2. Parturition

  3. Let down process

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Oxytocin is released by posterior pituitary during parturition in response to foetus ejection reflex. It stimulates strong uterine muscle contraction forcing the fetus downwards during parturition. Oxytocin helps to initiate release of milk by mammary gland after child birth. The more a baby suckles, the more oxytocin is released leading to milk let down. Thus, the correct answer is D.

Multiple choice 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

MSH produced by the pars intermedia of pituitary causes in lower vertebrates

  1. Darkening of skin

  2. Light colouration of skin

  3. Both A and B

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

MSH stimulates secretion of melanin from pigment cells in the skin and thereby causes skin darkening as required for camouflage in some lower vertebrates. Depending on the amount of melanin and carotene, the colour of skin is determined from pale yellow to dark. Thus, the correct answer is option A.

Multiple choice bio-chemistry 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

Deficiency of which of the following may cause bone deformation?

  1. PTH

  2. Vitamin D

  3. STH

  4. Thyroxine
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Rickets is a disorder caused by a lack of vitamin D, calcium, or phosphate. It leads to softening and weakening of the bones. Vitamin D helps the body control calcium and phosphate levels. If the blood levels of these minerals become too low, the body may produce hormones that cause calcium and phosphate to be released from the bones. This leads to weak and soft bones.

Multiple choice bio-chemistry 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

The vitamin which works along with para thyroid hormone is

  1. Vitamin C

  2. Calciferol

  3. Tocopherol
  4. Vitamin - $B _{12}$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A fall in the concentration of calcium in the bloodstream is detected by the parathyroid glands, which then produce parathyroid hormone. 

Parathyroid hormone increases the activity of the enzyme 1-hydroxylase, which produces active vitamin D. This increase in the concentration of calcium together with vitamin D feeds back to the parathyroid glands to stop further parathyroid hormone release. The production of vitamin D is also directly regulated by calcium, phosphate and calcitriol.

Multiple choice 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

Which hormone secretion is under nervous control?

  1. Adrenal cortex

  2. Anterior pituitary

  3. Posterior pituitary

  4. Pineal body
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Hormones of the adrenal cortex and pineal body are under control of tropic hormones of the anterior pituitary gland. The hormonal secretion of anterior pituitary is under control of regulatory hormones of the hypothalamus. The hormones of posterior pituitary are stored in axon ending and are secreted under nervous control. Thus, the correct answer is C.

Multiple choice 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

Life saving hormone are secreted by

  1. Pituitary gland

  2. Pineal gland

  3. Adrenal gland

  4. Thyroid gland
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Aldosterone of the adrenal cortex is life-saving hormone because it serves to retain sodium and water to maintain a sufficient blood volume for circulation. So, it maintains the osmolarity and volume of ECF. The pituitary gland regulates secretion of other endocrine glands. Pineal gland secretes melatonin that regulates body’s daily rhythms. Thyroid hormones regulate the basic metabolic rate. Thus, the correct answer is C.

Multiple choice 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

Third ventricle is found in 

  1. Heart of rabbit

  2. Brain of rabbit

  3. Heart of frog

  4. Kidney of frog
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The third ventricle (ventriculus tertius) is one of four connected fluid-filled cavities comprising the ventricular system within the rabbit's brain. The third ventricle is a narrow vertical cleft between the 2 lateral ventricles.

Multiple choice 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

Both organs of which set secretes hormones?

  1. Spleen- Brain

  2. Intestine- Eye

  3. Spleen- Liver

  4. Testes- Placenta
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The main hormone secreted by the testes is testosterone, an androgenic hormone. The placenta is an endocrine gland, that is only present during pregnancy. It secretes human chorionic gonadotrophin hormone (hCG), which is present only during pregnancy.

Multiple choice 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

Role of thymus in human is chiefly concerned with 

  1. Reproduction

  2. Immunology

  3. Calcium balance

  4. Blood coagulation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The thymus gland is an integral part of immune system. It helps in the maturation of lymphocytes. The thymus serves a vital role in the training and development of T-lymphocytes or T-cells, an extremely important type of white blood cell. So, the correct answer is option B.

Multiple choice 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

3F gland is 

  1. Adrenal

  2. Thyroid

  3. Gonadal

  4. Pancreas
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The adrenal medulla secretes 2 hormones - adrenalin and noradrenalin. 

Adrenalin is also called as an emergency hormone. Adrenaline brings about increased heartbeat, the rate of respiration and dilation of pupils, thereby preparing the body to face an emergency situation. Adrenalin is also called as 3F hormone because it takes care of emergency functions of the body during fear, fight, and flight. Hence, the adrenal gland is also known as 3F gland.