Chemical Coordination and Integration Test 69

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Chemical Coordination and Integration Test 69

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Question 1
1 / -0

A man is suffering from abnormally low body temperature, loss of appetite and extreme thirst. His brain scan is liable to show tumour in

A
Pons

B
Cerebellum

C
Medulla oblongata

D
Hypothalamus
Question 2
1 / -0

Endostyle metamorphoses into

A
Parathyroid

B
Thyroid

C
Thymus

D
Thalamus

Solution

As we have studied that ontogeny repeats phylogeny which means that the developmental stages of an embryo represent its ancestral features.
This can be easily visualized in the metamorphosis of endostyle. The endostyle in amphioxus(ammocoetes) corresponds to the thyroid gland in vertebrates since it seems to produce iodinated, tyrosine molecules which may function as thyroxine hormone produced by the thyroid gland.
So, the correct answer is 'Thyroid'.
Question 3
1 / -0

Somatostatin is produced in.

A
Adenohypophysis

B
Neurohypophysis

C
Pineal gland

D
Basal part of diencephalon

Solution

Somatostatin is produced from the hypothalamus(one part of the diencephalon) inhibits the pituitary gland's secretion of growth hormone and thyroid stimulating hormone. So, the correct answer is option D.
Question 4
1 / -0

Which of the following activities is disturbed, if parathyroid gland degenerates?

A
Growth

B
Sodium concentration

C
Potassium concentration

D
Calcium concentration

Solution

Parathyroid gland secretes hormone called parathormone (PTH). This hormone regulates calcium and phosphate balance between blood and other tissue. so, if parathyroid gland degenerates calcium concentration will be adversely affected.
so, the correct answer is option D.
Question 5
1 / -0

Name the hormone that helps in absorption of thyroid hormones from colloid to follicular cells.

A
LH

B
GH

C
FSH

D
TSH
Solution
- In the thyroid gland, the prohormone $T_3$ and $T_4$ remain in the colloid center till TSH stimulates the colloid to diffuse into the follicular cell and release $T_3$ and $T_4$ hormones.
Hence, the correct answer is option D, i.e., TSH.
Question 6
1 / -0

Which of the following is wrong?

A
Sella turcica is a bony cavity where pituitary gland is located.

B
Parathyroid hormone decreases the Ca $^{2+}$ levels in blood.

C
Thymosins play a major role in T-cell differentiation.

D
Insulin stimulates glycogenesis.

Solution

A. Correct option -B
B .Explanation for correct option -B

The parathyroid glands secrete 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.

Explanation for incorrect option
Option A: The pituitary gland is located in a bony cavity called Sella turcica and is attached to the hypothalamus by a stalk.
Option C: Thymosins are secreted by the thymus gland. These play a major role in the differentiation of T-lymphocytes, which provide cell-mediated immunity.
Option D : Insulin stimulates the conversion of glucose to glycogen (glycogenesis).
Question 7
1 / -0

The isthmus which connects right and left lobes of thyroid gland is located from ______ tracheal cartilages

A
$1^{st}\,to\, 3^{rd}$

B
$2^{nd}\, to\, 4^{th}$

C
$5^{th} \,to\, 7^{th}$

D
$6^{th}\, to\, 8^{th}$
Question 8
1 / -0

Which one of the following pairs of hormones are the examples of those that can easily pass through the cell membrane of the target cell and bind to a receptor inside it(mostly in nucleus)?

A
Insulin, glucagon

B
Thyroxine, insulin

C
Somatostatin, oxytocin

D
Cortisol, testosterone

Solution

Cortisol and testosterone are lipid soluble hormones, which can directly pass through the cell membrane of the target cell and bind with intracellular receptors. So, the correct answer is option D.
Question 9
1 / -0

Choose the correct answers from the alternatives given.
The major insect body parts are:

A
head, cephalothorax, and abdomen

B
cephalothorax, midsection, and abdomen

C
head, thorax, and abdomen

D
head, prothorax, and metathorax

Solution

Insects have the main visible parts on the head are the large compound eyes, the antenna (feelers), and the mouthparts. The thorax is the middle region of the body, and it bears the legs and wings There are three sections of the thorax: the prothorax, the mesothorax, and the metathorax. and the third part is the Abdomen.
So, the correct option is, 'Head, thorax and abdomen'.
Question 10
1 / -0

Hypothalamus directly controls the production of which of the following hormones?

A
Glucocorticoid and insulin

B
Insulin and glucagon

C
Atrial natriuretic factor and gastrin

D
Glucocorticoids and androgens

Solution

Hypothalamus plays very important role in maintaining body temperature and heart rate. It is also important to maintain homeostasis. Various hormones are produced and released by hypothalamus. It produces releasing and inhibiting hormones which in turn release or inhibit the production of pituitary hormones. The hormones produces are Anti-diuretic hormone (ADH), Corticotropin-releasing hormone (CRH), Gonadotropin-releasing hormone (GnRH), somatostain, oxytocin, Dopamine. During stress, CRH stimulates the production of ACTH from the pituitary gland. This in turn secretes glucocorticoids. Glucocorticoids increase blood glucose levels. GnRH stimulates the production and release of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) from pituitary gland. This in turn increases production of androgen from testes.
Thus, the correct answer is option D.

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Chemical Coordination and Integration Test 69

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Chemical Coordination and Integration Test 69

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Question 1

Pons

Cerebellum

Medulla oblongata

Hypothalamus

Question 2

Parathyroid

Thyroid

Thymus

Thalamus

Solution

Question 3

Adenohypophysis

Neurohypophysis

Pineal gland

Basal part of diencephalon

Solution

Question 4

Growth

Sodium concentration

Potassium concentration

Calcium concentration

Solution

Question 5

LH

GH

FSH

TSH

Solution

Question 6

Sella turcica is a bony cavity where pituitary gland is located.

Parathyroid hormone decreases the Ca2+^{2+}2+ levels in blood.

Thymosins play a major role in T-cell differentiation.

Insulin stimulates glycogenesis.

Solution

Question 7

1st to 3rd1^{st}\,to\, 3^{rd}1stto3rd

2nd to 4th2^{nd}\, to\, 4^{th}2ndto4th

5th to 7th5^{th} \,to\, 7^{th}5thto7th

6th to 8th6^{th}\, to\, 8^{th}6thto8th

Question 8

Insulin, glucagon

Thyroxine, insulin

Somatostatin, oxytocin

Cortisol, testosterone

Solution

Question 9

head, cephalothorax, and abdomen

cephalothorax, midsection, and abdomen

head, thorax, and abdomen

head, prothorax, and metathorax

Solution

Question 10

Glucocorticoid and insulin

Insulin and glucagon

Atrial natriuretic factor and gastrin

Glucocorticoids and androgens

Solution

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Parathyroid hormone decreases the Ca $^{2+}$ levels in blood.

$1^{st}\,to\, 3^{rd}$

$2^{nd}\, to\, 4^{th}$

$5^{th} \,to\, 7^{th}$

$6^{th}\, to\, 8^{th}$