Self Studies
Self Studies
Self Studies
Self Studies

Chemical Coordination and Integration Test 63

Result Self Studies

Chemical Coordination and Integration Test 63
  • Score

    -

    out of -
  • Rank

    -

    out of -
TIME Taken - -
Self Studies

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Self Studies Self Studies
Weekly Quiz Competition
  • Question 1
    1 / -0
    Thyrotropin - releasing factor (TRF) is produced by 
    Solution
    Thyrotropin-releasing hormone (TRH), also called thyrotropin-releasing factor (TRF), is a tropic, tripeptide hormone, produced by the hypothalamus, that stimulates the release of TSH (thyroid-stimulating hormone) from the anterior pituitary.
  • Question 2
    1 / -0
    In mammals the estrogens are secreted by the Graafian follicle from its
    Solution
    In mammals, the estrogens are secreted by the Graafian follicle from its internal theca. Theca interna cells express receptors for luteinizing hormone (LH) to produce estrogen. 
    After rupture of the mature ovarian follicle, the theca interna cells differentiate into the theca lutein cells of the corpus luteum. Theca lutein cells secrete androgens and progesterone. Theca lutein cells are also known as small luteal cells. So, the correct answer is option B.
  • Question 3
    1 / -0
    Ovulation is controlled mainly by .............. hormone.
    Solution
    • Ovulation is the release of eggs from the ovaries. In humans, this event occurs when the ovarian follicles rupture and release the secondary oocyte ovarian cells.
    • The process of ovulation is controlled by the hypothalamus of the brain and through the release of hormones secreted in the anterior lobe of the pituitary gland, luteinizing hormone (LH) and follicle-stimulating hormone (FSH).
    • Hence Ovulation is controlled mainly by luteinizing hormone.
    • So, the correct answer is 'Luteinizing hormone'.
  • Question 4
    1 / -0

    List IList II
    APituitary gland1Deficiency cause goitre
    BAdrenal glands2Deficiency causes diabetes
    CTestes3Estrogen
    DThyroid gland4Testosterone
    EPancreas5Stress hormone
    FOvaries6Master gland
    Solution
    • A- 6 -The pituitary gland is a small pea-sized gland located at the base of the brain that plays a major role in regulating vital body functions and general wellbeing. The pituitary gland is also called the “master gland” because its hormones control other parts of the endocrine system.
    •  B- 5 -Adrenaline is a hormone secreted by adrenal medulla during stress. Adrenaline is called an emergency hormone because it initiates quick action which makes the individual think and responds quickly to the stress. Hence adrenaline is also called a stress hormone.
    • C- 4-The testes are two oval-shaped male reproductive glands that produce sperm and the hormone testosterone. Leydig cells of the testis secrete a hormone called testosterone.
    • D- 1 -Follicular cells of thyroid gland secrete hormones called thyroid hormones. The deficiency of these hormones results in enlargement of the thyroid gland, commonly called goiter. 
    • E- 2- Diabetes is a disease in which your blood glucose, or blood sugar, levels are too high. Glucose comes from the foods you eat. Insulin is a hormone secreted by the pancreas that helps the glucose get into your cells to give them energy. With type 1 diabetes, your body does not make insulin. Hence deficiency of pancreatic secretion causes diabetes.
    •  F- 3 -Ovary is the primary female sex organ that produces one ovum during each menstrual cycle. In addition, ovary also produces two groups of steroid hormones called estrogen and progesterone.
    • So, the correct answer is 'A- 6, B- 5, C- 4, D- 1, E- 2, F- 3'.
  • Question 5
    1 / -0
    According to the accepted concept of hormone action, if receptor molecules are removed from target organs
    Solution
    • Though hormones are released into the blood stream and hence can reach all cells, yet they affect only those cells which have hormone specific receptors.
    • Thus, binding of hormone to receptor is crucial irrespective of presence of receptors inside the cell or on its surface. 
    • This makes options A and D incorrect as absence of receptors renders the cell unaffected by hormonal action. 
    • Option B is incorrect as hormone-receptor binding is essential step in hormonal action. 
    • Thus, in absence of receptors, the target organ will no longer respond to hormone. Option C is correct. 
  • Question 6
    1 / -0
    Identify the mismatched pair from the following.
    Solution
    a) Epinephrine and nor epinephrine are the secreted by adrenal medulla under emergency condition to prepare the body for flight or fight response and hence are known as emergency hormones. 
    b) During parturition, pressure of fetus’s head against the cervix and send signals to make hypothalamus to trigger the release of oxytocin from posterior pituitary. Oxytocin stimulates strong uterine muscle contraction forcing the fetus downwards and hence is also known as birth hormone. 
    c) Progesterone is secreted by corpus luteum (the ovulated follicle) during first three months of pregnancy and by placenta during next 6 months. It prepares the uterus for implantation, maintains the uterine endometrium during pregnancy and inhibits development of new follicle and menses for about 6 months by exerting negative feedback on secretion of gonadotropins. In absence of progesterone, disintegration of uterine endometrium can cause abortion/miscarriage and hence, it is regarded as pregnancy hormone. 
    d) Follicle stimulating hormone (FSH) and Luteinizing hormone are gonadotropins secreted by anterior pituitary. Since both LH and FSH act on gonads, they are known as gonadotropins. Gonads (testes and ovaries) serve as endocrine organs and secrete androgens and estrogen and progesterone respectively.
  • Question 7
    1 / -0
    Which one of the following four glands is correctly matched with the accompanying description?
    Solution
    Hyposecretion of thyroxine causes cretinism in children.
    The thymus is a specialized organ of the immune system. The thymus is active in young ones but gradually disappear after sexual maturity. 
    Parathormone secreted from parathyroid plays an important role in increasing the blood calcium levels through bone desorption.
    Delta cells of the islets of Langerhans produce somatostatin, which inhibits the activity of alpha and beta cells. Hence, option B is correct.
  • Question 8
    1 / -0
    According to the accepted concept of hormone action, if receptor molecules are removed from target organs 
    Solution
    Though hormones are released into the blood stream and hence can reach all cells, yet they affect only those cells which have hormone specific receptors. Thus, binding of hormone to receptor is crucial irrespective of presence of receptors inside the cell or on its surface. Thus, options A and D are incorrect as the absence of receptors renders the cell unaffected by hormonal action. Option B is incorrect as hormone-receptor binding is an essential step in hormonal action. Thus, in absence of receptors, the target organ will no longer respond to the hormone. Hence, the correct answer is option C.
  • Question 9
    1 / -0
    MSH of pars intermedia of pituitary causes in lower vertebrates
    Solution
    An area which makes the boundary between an anterior and posterior lobes of the pituitary is called as pars intermedia. It is made up of three distinct cells such as basophils, chromophobes, and cysts with colloid. In humans, It produces melanocyte-stimulating hormone or MSH which causes the release of melanin pigment in skin melanocytes (pigment cells). But in lower vertebrates (fish, amphibians), MSH from the pars intermedia causes darkening of the skin and response to changes in the background color. This color change is due to MSH stimulating the dispersion of melanin pigment in dermal (skin) melanophore cells. Thus, the correct answer is option A.
  • Question 10
    1 / -0
    Match the following:
    A. Islets of Langerhans1. Calcitonin 
    B. Pituitary gland2. Epinephrine
    C. Thyroid gland3. Growth hormone
    D.Adrenal gland4. Insulin
    Solution
    Islets of Langerhans are the cells in the pancreas. The $$\beta$$- cells of Langerhans produce insulin which is the hormone required for the regulation of the blood sugar. 
    The anterior part of the pituitary gland secretes the growth hormone. The growth hormone is responsible for growth, development and the regulation of metabolism.
    The parafollicular cells of thyroid gland secrete calcitonin. The hormone helps in the regulation of calcium and phosphorus in the blood. 
    The medulla part of the adrenal gland secretes epinephrine. The hormone is released during stress which controls the blood volume, pressure and the heart rate.
    Thus, the correct answer is option B. 
Self Studies
User
Question Analysis

  • Correct -

  • Wrong -

  • Skipped -

My Perfomance
  • Score

    -

    out of -
  • Rank

    -

    out of -
Re-Attempt Weekly Quiz Competition
Selfstudy
Selfstudy
Self Studies Get latest Exam Updates
& Study Material Alerts!
No, Thanks
Self Studies
Click on Allow to receive notifications
Allow Notification
Self Studies
Self Studies Self Studies
To enable notifications follow this 2 steps:
  • First Click on Secure Icon Self Studies
  • Second click on the toggle icon
Allow Notification
Get latest Exam Updates & FREE Study Material Alerts!
Self Studies ×
Open Now