Tag: hormones

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Questions Related to hormones

Multiple choice biology control and coordination in living organisms enzymes and hormones hormones coordination in human beings- chemical control

Mark the wrong statement about enzymes

  1. enzymes are biological catalysts

  2. each enzyme can catalyse a number of similar reactions

  3. enzymes are very efficient catalysts

  4. enzymes are needed only in very small amounts for their action
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Option (B) is incorrect. Enzymes are efficient and biological catalysts which are needed only in very small amounts for their action but each enzyme can catalyse only a specific selective reactions. This is often referred to as "the lock and key" model.

Multiple choice biology control and coordination in living organisms enzymes and hormones hormones coordination in human beings- chemical control

The chemical messengers produced in ductless glands are:

  1. vitamins

  2. lipids

  3. antibiotics

  4. hormones
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The chemical messengers produced in ductless glands are called hormones. Hormones are produced by the endocrine system (composed of glands) but are transported to different parts of the body through the bloodstream.


 Endocrine glands have a rich blood supply through which hormones travel to reach their target organs. Hormones alter the metabolism of target organs by increasing or decreasing their activity.

Hence, the option $D$ is correct.

Multiple choice biology control and coordination in living organisms enzymes and hormones hormones coordination in human beings- chemical control

Which of the following substance acts as stimulator?

  1. vitamins

  2. enzymes

  3. hormones

  4. carbohydrates
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Hormones acts as stimulator. Hormones are essential for every activity of life, including the processes of digestion, metabolism, growth, reproduction, and mood control. Many hormones, such as neurotransmitters, are active in more than one physical process. To release active hormones quickly into the irulation, hormone biosynthetic cells may produce and store biologically inactive hormones in the form of pre- or prohormones. These can then be quickly converted into their active hormone form in response to a particular stimulus.

Multiple choice biology control and coordination in living organisms enzymes and hormones hormones coordination in human beings- chemical control

The term hormone was first introduced by

  1. Gobind khorana

  2. Baylers and Starling

  3. James waston

  4. Giulio natta
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The term hormone was first introduced by Baylers and Starling. Hormones are your body's chemical messengers. They travel in your bloodstream to tissues or organs. They work slowly, over time, and affect many different processes, including growth and development, metabolism - how your body gets energy from the foods you eat, sexual function, reproduction, mood.

Multiple choice biology control and coordination in living organisms enzymes and hormones hormones coordination in human beings- chemical control

For artificial ripening of fruit, which of the following is used?

  1. Testosterone

  2. Insulin

  3. Ethylene

  4. Estrogen
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Ethylene gas is used for artificial ripening of fruits. Ethylene is also an important natural plant hormone, used to induce ripening process under controlled conditions of temperature. Ethylene treatment breaks down the green chlorophyll pigment in the exterior part of the peel and allows the yellow or orange carotenoid pigments to be expressed.

Multiple choice biology control and coordination in living organisms enzymes and hormones hormones coordination in human beings- chemical control

Match the following.
A. Homeostasis                      1) Insulin
B. Emergency hormone         2) Structure of insulin
C. Metabolism                       3) Adrenaline
D. Peptide hormones             4) Thyroxine
E. Pancreatic islets                5) Maintenance of constant internal environment
F. Sanger                                6) Affect the properties of Plasma membrane 

  1. A - 1; B - 5; C - 3; D - 4; E - 6; F - 2

  2. A - 2; B - 4; C - 3; D - 1; E - 6; F - 2

  3. A - 3; B - 5; C - 3; D - 4; E - 6; F - 1

  4. A - 5; B - 3; C - 4; D - 1,6; E - 1; F - 2
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Homeostasis is the maintenance of constant internal environment.
Adrenaline is an emergency hormone. It increases pulse rate, blood pressure during emergency and stimulates the breaking of liver glycogen into blood glucose.
Thyroxine is useful in metabolism. Insulin is secreted from thyroid gland. It regulates general growth and development and controls carbohydrate, lipid and protein metabolism.
Peptide hormones such as insulin, affect the properties of plasma membrane.
Insulin is secreted in pancreatic islets. It controls carbohydrate metabolism and maintains glucose level in the blood.
Sanger represents the structure of insulin.

Multiple choice biology control and coordination in living organisms enzymes and hormones hormones coordination in human beings- chemical control

Cortisol is a :

  1. glucocorticoid

  2. mineralocorticoid

  3. sex hormone

  4. none of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • Cortisol is type glucocorticoid hormone, cortisol (glucocorticoid) also called as life-saving hormone as it increases the blood glucose level in the condition of tension through gluconeogenesis, 
  • In the condition of tension the glucose consumption from neuron increases that can be fatal for one.
Other effects of cortisol are-
  1. Anti-inflammatory
  2. Immuno-suppressive
  3. BMR regulation
  4. RBC regulation

Multiple choice biology control and coordination in living organisms enzymes and hormones hormones coordination in human beings- chemical control

Parathyroid hormone (PTH):

  1. stimulates the release of calcium by the kidneys

  2. stops the absorption of calcium from the intestine

  3. causes blood calcium level to decrease

  4. causes blood phosphate level to decrease
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hormones are used to communicate between the organs of the body. The release of parathyroid hormone causes blood phosphate level to decrease. When blood calcium level is low, this hormone is released so that the level comes back to normal. Increased level of PTH may lead to joint pains, muscles weakness and many more effects.

Multiple choice biology control and coordination in living organisms enzymes and hormones hormones coordination in human beings- chemical control

Which hormone affects physical appearance?

  1. male and female

  2. steroid

  3. growth

  4. gonadotropin-releasing hormone
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

  • Male and female hormones or the gonadotropin-releasing hormones have almost the same functions, they induce the primary and secondary sexual characteristics
Example-Estrogen, progesterone.
  • steroid type of hormones play a role in the physiological effect on the body,
Example- Insulin, glucagon.
  • Growth type of hormones affects physical appearance.
Example- GH, somatomedin etc.