Tag: zoology

Questions Related to zoology

Action of endocrine glands is mediated through

zoology the endocrine system introduction to human endocrine system endocrine system and hormone coordination in human beings- chemical control

  1. Hormones

  2. Enzymes

  3. Minerals

  4. Vitamins

Show answer
Correct Option: A
Explanation:

Endocrine glands release hormones (chemical messengers) into the bloodstream to be transported to various organs and tissues throughout the body.

I am ductless gland. I secrete chemicals which are transported by the blood to target cells. Who am I?

zoology the endocrine system introduction to human endocrine system endocrine system and hormone coordination in human beings- chemical control

  1. Endocrine gland

  2. Exocrine gland

  3. Brain

  4. Bone marrow

Show answer
Correct Option: A
Explanation:

The gland is an endocrine gland as it released many hormones which travels to the target site cells through blood. Adrenal gland and thyroid gland are endocrine glands.

Endocrine glands release hormones directly into the

zoology the endocrine system introduction to human endocrine system endocrine system and hormone coordination in human beings- chemical control

  1. Blood

  2. Lymph

  3. Capillary

  4. Vein

Show answer
Correct Option: A
Explanation:

Endocrine glands are the glands of the endocrine system of our body that secretes their hormones, products, directly into the blood. Pineal gland, pituitary gland, pancreas, ovaries, testes, thyroid gland, parathyroid gland, hypothalamus and adrenal glands are the major endocrine glands. In contrast to these glands, some glands release their hormones with the help of a duct onto the epithelial surface and are called endocrine glands. Some of these are sweat gland, mammary gland, lacrimal gland, salivary gland, sebaceous gland, mucous gland etc. 

So, the correct answer is option A.

All functions of the body are regulated and integrated by

zoology the endocrine system introduction to human endocrine system endocrine system and hormone coordination in human beings- chemical control

  1. Respiratory system

  2. Digestive system

  3. Neuroendocrine system

  4. Excretory system

Show answer
Correct Option: C
Explanation:

Hormones are used to communicate between organs and tissues to regulate physiological and behavioral activities, such as digestion, metabolism, respiration, tissue function, sensory perception, sleep, excretion, lactation, stress, growth and development, movement, reproduction, and mood.

Which of the following hormones is a steroid?

zoology the endocrine system introduction to human endocrine system endocrine system and hormone coordination in human beings- chemical control

  1. Prostaglandin

  2. Estrogen

  3. Thyroxine

  4. Adrenaline

Show answer
Correct Option: B
Explanation:

A steroid hormone is a steroid that acts as a hormone. Steroid hormones can be grouped into two classes : Corticosteroids and sex steroids. Within those two classes are the five types according to the receptors to which they bind : glucocorticoid,  mineralocorticoids, androgens, estorgens and progesterone. 

So the correct option is "Estrogen".

Endocrine glands release hormones directly into the blood. ............. transports it to the target organs .................. 

zoology the endocrine system introduction to human endocrine system endocrine system and hormone coordination in human beings- chemical control

  1. Blood, target organ

  2. Effector organ, blood

  3. Ducts, target organ

  4. Capillaries, target organ

Show answer
Correct Option: A
Explanation:

Endocrine glands release hormones directly into the blood for transportation to the effector organ. The effector organ can also be called as a target organ. The major glands of the endocrine system include the pineal gland, pituitary gland, pancreas, ovaries, testes, thyroid gland, parathyroid gland, hypothalamus and adrenal glands.

So, the correct answer is option A.

Structure responsible for formation of sigmoid notch is

zoology the endocrine system introduction to human endocrine system endocrine system and hormone coordination in human beings- chemical control

  1. Olecranon process of humerus

  2. Olecranon process of femur

  3. Olecranon process of radius ulna

  4. Olecranon process of tibia fibula

Show answer
Correct Option: C
Explanation:

Ulna projects beyond the radius as an oleander process which has a deep sub terminal sigmoid notch for articulation with the distal end of humerus.

Which of the following statements is correct in relation to the endocrine system?

zoology the endocrine system introduction to human endocrine system endocrine system and hormone coordination in human beings- chemical control

  1. Adenohypophysis is under direct neural regulation of the hypothalamus

  2. Organs in the body like gastrointestine tract, heart, kidney and liver do not produce any hormones

  3. Non-nutrient chemicals produced by the body in trace amount that act as intercellular messenger are known as hormones

  4. Releasing and inhibitory hormones are produced by the pituitary gland

Show answer
Correct Option: C
Explanation:

Adenohypophysis is not under direct regulation of the hypothalamus. Neurohypophysis is under direct regulation of the hypothalamus.

Organs in the body like gastrointestine tract produce peptide hormones, heart produce atrial natriuretic factor (ANF) hormone, kidney produce erythropoietin and liver produce angiotensinogen.
Hormones are non-nutrient chemicals produced by the body in trace amount that act as intercellular messenger. They are secreted from endocrine glands. They act on their target organ and carry out specific functions.
Releasing and inhibitory hormone like Thyrotropin releasing hormone and dopamine, respectively, are produced by the hypothalamus.
Statement C is correct in relation to the endocrine system.

Which of the following disease results from endocrine disorder?

zoology the endocrine system introduction to human endocrine system endocrine system and hormone coordination in human beings- chemical control

  1. Goitre

  2. Jaundice

  3. Typhoid

  4. Pneumonia

Show answer
Correct Option: A
Explanation:

(A) Goiter is the enlargement of the thyroid gland. A goiter is associated with the thyroid which is not functioning properly.

(B) Jaundice is a yellowish pigmentation of the skin. 
(C) Typhoid is a bacterial infection that spreads through contaminated water and food.
(D) Pneumonia is an inflammatory condition of lung affecting primarily the small air sacs known as alveoli.
So the correct option is goiter. 

Choose the correct option among the following.

Column A Column B
A. Epinephrine (i) Stimulates in muscle growth
B. Testosterone (ii) Decrease in blood pressure
C. Glucagon (iii) Breakdown of liver glycogen
D. Atrial natriuretic factor (iv) Increases heart beat
zoology the endocrine system introduction to human endocrine system endocrine system and hormone coordination in human beings- chemical control

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

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

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

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

Show answer
Correct Option: B
Explanation:

A. Role of epinephrine and non- epinephrine- They whip up metabolism for preparing the animal to face special conditions created by physical stress such as fall in BP or blood sugar, anger, fear etc..All these conditions require more energy which is provided by increasing heart rate, blood pressure, sugar level of blood.

B. Testosterone- It stimulates the development of male accessory sex characters such as hair on the face, growth and distribution of hair on the body, stronger bones and muscles.
C. Glucagon- It is secreted by alpha cells of the islands of Langerhans in response to a fall in the blood glucose level. It brings about change of liver glycogen to blood glucose( glycogenolysis).
D. Atrial natriuretic factor- The cells, called cardiocytes, of the atria secrete a peptide, ANF in response to an increased return of the venous blood. This hormone regulates the blood volume through increased excretion of ions and water.
So, the correct answer is 'A-(iv), B-(1), C-(iii), D-(ii)'.