CBSE Questions for Class 11 Medical Biology Chemical Coordination And Integration Quiz 15 - MCQExams.com

Refer to the given diagrammatic representation of the mechanism of action of a protein hormone.
In which of the following options correct labelling of A, B, and C is given?

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  • A-Generation of second messenger, B-Physiological responses, C-Biochemical responses
  • A-Activation of genes, B-Biochemical responses, C- Generation of second messenger
  • A-Generation of second messenger, B-Biochemical responses, C-Physiological responses
  • A-Biochemical responses, B-Activation of genes, C-Physiological responses
Choose the incorrect pairs.
Hormone Source Function
A.Vasopressin Posterior pituitary Increases loss of water through urine 
B.Norepinephrine Adrenal medulla Increases heartbeat, rate of respiration and alertness
C.Glucagon Beta-cells of Islets of LangerhansStimulates glycogenolysis 
D.Prolactin Anterior pituitary Regulates growth of mammary glands and milk formation in females 
  • A and B
  • B and D
  • C and D
  • A and C
The pineal gland secretes a hormone progesterone which helps to regulate sleep pattern. Thyroid glands release hormone which regulate the level of calcium in the blood with the help of calcitonin which is produced in the parathyroid glands. Select the correct option regarding the given paragraph.
i) Positions of pineal and parathyroid should be interchanged
ii) Progesterone must be replaced by melatonin
iii) Parathyroid should not be replaced as it is correctly mentioned.
iv) Positions of progesterone and calcitonin should be interchanged
v) Positions of thyroid and parathyroid should be interchanged 
  • ii and v only
  • i, ii and v only
  • i and iii only
  • ii and iv only
Question
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  • (1) A$$ \longrightarrow $$ iii, B $$ \longrightarrow $$ii, C $$ \longrightarrow $$ iv, D $$ \longrightarrow $$i
  • (2) A$$ \longrightarrow $$ iii, B $$ \longrightarrow $$i, C $$ \longrightarrow $$ iv, D $$ \longrightarrow $$ii
  • (3) A$$ \longrightarrow $$ iii, B $$ \longrightarrow $$ii, C $$ \longrightarrow $$ i, D $$ \longrightarrow $$iv
  • (4) A$$ \longrightarrow $$ iii, B $$ \longrightarrow $$iv, C $$ \longrightarrow $$ i, D $$ \longrightarrow $$ii
Which hormone is secreted from zona glomerulosa ______________.
  • Aldosterone
  • Cortisol
  • Androgen
  • Glucagon
Arrange the following step in correct sequence found during the mechanism of lipid insoluble hormone (epinephrine) function or action.
A. Second messenger formation
B. Binding to the surface receptor
C. Glycogenolysis
D. Adenylate cyclase activation
  • C, A, D and B
  • B, D, A and C
  • D, B, C and A
  • None of the above
The effect of some compounds (present in partially digested food) on pancreatic secretion is depicted in the bar graph. Compounds 1, 2, and 3 represent:

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  • Acid, Fat, Salt
  • Salt,  Peptone, Fat
  • Acid,  Fat, Peptone
  • Pepsin, Acid, Fat
Consider the following four statements (i-iv) and select the option that correctly identifies the true (T) and false (F) ones.
(i) Atrial natriuretic factor can cause vasodilation( dilation of blood vessels) and thereby decreases the blood pressure.
(ii) On an average, $$60-70$$ gm of urea is excreted out per day. 
(iii) Sebaceous glands eliminate certain substances like $$NaCl$$ , urea and lactic acid through sebum.
(iv) PCT is lined by simple cuboidal brush border epithelium which increases the surface area for reabsorption. 
  • (i) $$F$$ , (ii) $$F$$, (iii) $$T$$, (iv) $$T$$
  • (i) $$F$$ , (ii) $$T$$, (iii) $$T$$, (iv) $$T$$
  • (i) $$T$$ , (ii) $$F$$, (iii) $$F$$, (iv) $$T$$
  • (i) $$T$$ , (ii) $$T$$, (iii) $$F$$, (iv) $$T$$
The atrial wall of our heart secretes a very important peptide hormone called _______, which _______ because it causes dilation of the blood vessels. Choose the option which correctly fills the blank.
  • Rennin, increases the blood pressure
  • Angiotensinogen, decreases the blood pressure
  • Atrial natriuretic factor, decreases the blood pressure
  • Atrial natriuretic factor, increases the blood pressure
Secretion of which of the following gland may effect by the surgical removal of pituitary gland?
  • Thyroid
  • Adrenal gland's medulla
  • Leydig cells
  • Thymus
  • Parathyroid
Name the two hormones that regulates blood calcium levels in the body
  • Insulin and glucagon
  • Thyroxine and estrogen
  • Thyrocalcitonin and parathyroid hormone
  • Prolactin and oxytocin
Similarity between the secretion of thyroid and adrenal gland is that, secretions from both
  • Are proteins
  • Are steroid
  • Increase glucose metabolism
  • Control mineral metabolism
The chemical substances released by activated spermatozoa, that acts on the ground substances of the follicle cells is 
  • Progesterone
  • Hyaluronidase
  • Relaxin
  • Gonadotropin
  • Teratogen
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