Chemical Coordination and Integration Test 70

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Chemical Coordination and Integration Test 70

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Weekly Quiz Competition

Question 1
1 / -0

Lac is secreted by

A
Dermal glands

B
Intestinal glands

C
Salivary glands

D
Mucosal glands

Solution

Lac is the scarlet resinous secretion by species of lac insects. Larvae of insect, Tachardia lacca secrete resinous substance by special dermal glands located all over the body. Resinous secretion becomes hard after coming in contact with air forming 'cell'.
Thus the correct answer is option A.
Question 2
1 / -0

Consider the following four statements (a-d) and select the option which includes the correct ones only.
(a) The thyroid hormone play an important role in basal metabolic rate and erythropoisis
(b) Glucocorticoids inhibits inflammatory reactions by suppressing the immune system and promotes erythropoisis
(c ) Androgen promotes development maturation and function of the male sex organ as well as erythropoisis
(d) The gastrointestinal tract not only secretes gastric inhibitory peptide but also promotes formation of RBC.

A
$$4$$

B
$$3$$

C
$$2$$

D
$$1$$

Solution

All the above-listed statements are true.
(a)The thyroid plays a crucial role in metabolism.
(b)Glucocorticoid inhibits inflammatory reactions.
(c)Androgen promotes the development of maturation of sex organs.
(d)Gastrointestinal tract secretes inhibitory peptide.
So, the correct option is '4'
Question 3
1 / -0

Choose the correct answer from the alternatives given.
Parathyroid hormone (PTH) regulates:

A
calcium balance between blood and tissues

B
glucose balance between blood and tissues

C
regulates sleep

D
regulates temperature

Solution

The parathyroid gland secretes a peptide hormone called parathyroid hormone (PTH). The secretion of PTH is regulated by the circulating levels of calcium ions. PTH increases the calcium levels in the blood. PTH also stimulates reabsorption of calcium by the renal tubules and increase calcium absorption from the digested food.
So the correct answer is calcium balance between blood and tissue.
Question 4
1 / -0

Choose the correct answers from the alternatives given.
Pancreatic juice contains

A
hydrogen carbonate

B
hydrochloric acid

C
sulphuric acid

D
deoxyribonucleic acid

Solution

Pancreatic juice is a liquid secreted by the pancreas, which contains a variety of enzymes, including trypsinogen, chymotrypsinogen, elastase, carboxypeptidase, pancreatic lipase, nucleases, and amylase. Pancreatic juice is alkaline in nature due to the high concentration of bicarbonate ions
So, the correct answer is 'hydrogen carbonate'
Question 5
1 / -0

The given diagram represents the mechanism of action for two categories of hormones. Which of the following options correctly identifies the labels A to I?

A
A-Steroid hormone, B-Receptor, C-Secondary messenger, D-Non-steroid hormone, E-Nucleus, F-Hormone-receptor complex, G-Genome, H-mRNA, I-Protein

B
A-Non-steroid hormone, B-Receptor, C-Secondary messenger, D-Steroid hormone, E-Nucleus, F-Hormone-receptor complex, G-Genome, H-mRNA, I-Protein

C
A-Steroid hormone, B-Receptor, C-Primary messenger, D-Non-steroid hormone, E-Nucleus, F-Hormone-receptor complex, G-Genome, H-mRNA, I-Protein

D
A-Steroid hormone, B-Enzyme, C-Secondary messenger, D-Non-steroid hormone, E-Nucleus, F-Hormone-receptor complex, G-Genome, H-mRNA, I-Protein
Solution
- Hormones (Non-steroidal hormones) (A) that interact with membrane-bound receptors (B) normally do not enter the target cell but generate second messengers (cyclic AMP, IP$$_3$$, etc) which in turn regulate cellular metabolism.
- Hormones (D) that interact with intracellular receptors (e.g., steroid hormones, iodothyronines, etc) mostly regulate gene expression or chromosome function by the interaction of the hormone-receptor complex (H) inside the nucleus (E) with the genome (G) cumulative biochemical actions. The mRNA (H) translates into protein (I) and shows physiological responses.
- So, the correct answer is B.
Question 6
1 / -0

The female hormone that causes deposition of fat in the breast, and hips and the growth of pubic hairs during puberty is

A
Estrogen

B
Progesterone

C
Luteinizing hormone

D
Follicle-stimulating hormone

Solution

Estrogen, or oestrogen, is the primary female sex hormone. It is responsible for the development and regulation of the female reproductive system and secondary sex characteristics. Estrogens are responsible for the development of female secondary sexual characteristics during puberty, including breast development, widening of the hips, and female fat distribution. Estrogen, in conjunction with growth hormone and its secretory product insulin-like growth factor 1 is critical in mediating breast development during puberty.
So the correct option is 'estrogen'.
Question 7
1 / -0

Match column I with column II and select the correct option from the given.
Column I Column II
A. Hypothalamus (i) Relaxin
B. Anterior pituitary (ii) Progesterone
C. Testis (iii) FSH and LH
D. Ovary (iv) Androgen
(v) Gonadotropin releasing hormone

A
A-(v), B-(iii), C-(iv), D-(ii)

B
A-(v), B-(iii), C-(ii), D-(iv)

C
A-(i), B-(ii), C-(iv), D-(iii)

D
A-(iii), B-(v), C-(iv), D-(ii)

Solution

A. Hypothalamus: It is located in the base of the diencephalon. It releases releasor hormone(stimulate anterior pituitary) and inhibiting hormone( inhibit anterior pituitary). So, hypothalamus stimulates gonadotrophin-releasing hormone.
B. Anterior pituitary: It stimulates FSH and LH whose function is to stimulate spermatogenesis in male and growth of ovarian follicle in the female.
C. Testis: It secretes androgen in males such as testosterone whose function develops male reproductive organs and accessory sexual characters.
D. Ovary: It stimulates estrogen and progesterone. Progesterone stops egg production, attaches foetus to the uterine wall.
So, the correct answer is 'A- v, B-iii, C-iv, D-ii'.

Question 8

1 / -0

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 Langerhans	Stimulates 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

Solution

Vasopressin hormone is secreted by the posterior pituitary gland. It constricts the blood vessel and increases reabsorption of water from kidney. Hence, it decreases loss of water through urine. Norepinephrine is secreted by adrenal medulla. It increases heart rate and blood pressure. It also increases rate of respiration and alertness. Glucagon hormone is secreted by the alpha cells of Islets of Langerhands. It stimulates glycogenolysis in the liver. It increases amount of glucose in the blood. Prolactin hormone is secreted by the anterior pituitary gland. It promotes the mild formation in females. It also causes growth or enlargement of mammary glands.

Thus, the correct answer is 'A and C.'

Question 9
1 / -0

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

A
ii and v only

B
i, ii and v only

C
i and iii only

D
ii and iv only

Solution

The correct statement is- 'The pineal gland secretes a hormone melatonin which helps to regulate sleep pattern. Parathyroid Gland release hormone which regulates the level of calcium in the blood with the help of calcitonin which is produced in the thyroid gland.'
So the correct option is 'ii and v only'.
Question 10
1 / -0

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

A
C, A, D and B

B
B, D, A and C

C
D, B, C and A

D
None of the above

Solution

Lipid insoluble hormones such as epinephrine acts or functions on a particular site by binding to it. These hormones have their receptors on the plasma membrane of the target cells. The binding of hormone to the receptor initiates a series of events. These series of events are called as signal transduction. In this, the hormone first binds to the surface receptor. It leads to the activation of the enzyme adenylate cyclase. This enzyme converts the ATP into cyclic AMP or cAMP inside the cell. This cAMP acts as second messenger. This cAMP then activates cAMP-dependent protein kinase called protein kinase A. This proteni kinase A triggers a series of molecular interactions that leads to glycogenolysis. This results in the synthesize of glucose from glycogen.
Thus, the correct answer is 'B, D, A and C.'

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Column I	Column II
A. Hypothalamus	(i) Relaxin
B. Anterior pituitary	(ii) Progesterone
C. Testis	(iii) FSH and LH
D. Ovary	(iv) Androgen
	(v) Gonadotropin releasing hormone

Chemical Coordination and Integration Test 70

Result

Chemical Coordination and Integration Test 70

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SHARING IS CARING

Question 1

Dermal glands

Intestinal glands

Salivary glands

Mucosal glands

Solution

Question 2

$$4$$

$$3$$

$$2$$

$$1$$

Solution

Question 3

calcium balance between blood and tissues

glucose balance between blood and tissues

regulates sleep

regulates temperature

Solution

Question 4

hydrogen carbonate

hydrochloric acid

sulphuric acid

deoxyribonucleic acid

Solution

Question 5

A-Steroid hormone, B-Receptor, C-Secondary messenger, D-Non-steroid hormone, E-Nucleus, F-Hormone-receptor complex, G-Genome, H-mRNA, I-Protein

A-Non-steroid hormone, B-Receptor, C-Secondary messenger, D-Steroid hormone, E-Nucleus, F-Hormone-receptor complex, G-Genome, H-mRNA, I-Protein

A-Steroid hormone, B-Receptor, C-Primary messenger, D-Non-steroid hormone, E-Nucleus, F-Hormone-receptor complex, G-Genome, H-mRNA, I-Protein

A-Steroid hormone, B-Enzyme, C-Secondary messenger, D-Non-steroid hormone, E-Nucleus, F-Hormone-receptor complex, G-Genome, H-mRNA, I-Protein

Solution

Question 6

Estrogen

Progesterone

Luteinizing hormone

Follicle-stimulating hormone

Solution

Question 7

A-(v), B-(iii), C-(iv), D-(ii)

A-(v), B-(iii), C-(ii), D-(iv)

A-(i), B-(ii), C-(iv), D-(iii)

A-(iii), B-(v), C-(iv), D-(ii)

Solution

Question 8

A and B

B and D

C and D

A and C

Solution

Question 9

ii and v only

i, ii and v only

i and iii only

ii and iv only

Solution

Question 10

C, A, D and B

B, D, A and C

D, B, C and A

None of the above

Solution

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