Tag: hormones and metabolism

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Questions Related to hormones and metabolism

Multiple choice zoology endocrine system and chemical co-ordination classification of hormones endocrine system and hormone hormones and metabolism

Steroid-based hormones are able to act inside the cell. This is possible because

  1. there are no receptors for hormones on the cell surface

  2. hormones must interact with the nucleus to have an effect.

  3. proteins carry them into the cell

  4. steroid-based hormones are hydrophobic molecules that can pass through the cell membrane.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Steroid based hormones are fat soluble so they can enter the cell easily after which they bind to the specific steroid receptors and perform the required activities on the cell. And because they are lipids(hydrophobic molecules)  so they can enter the cell membrane.
So, the correct option is 'steroid-based hormones are hydrophobic molecules that can pass through the cell membrane'
Multiple choice zoology endocrine system and chemical co-ordination classification of hormones endocrine system and hormone hormones and metabolism

All of the following statements are true about hormones except

  1. They are transporated by the circulatory system

  2. They bind to receptors on target cells

  3. They must be present in large quantities to have an effect

  4. They are secreted by endocrine glands

  5. They can affect organs of the body that are far removed from their site of synthesis
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
1. Hormones are produced by specialized glands(endocrine glands) and are secreted directly into the bloodstream.
2. Hormones are transported by the bloodstream from the endocrine cells to serve as ‘chemi­cal messenger’ which act on target cells or organs by regulating the rates of specific metabolic reactions. 
3. Hormones exert their effects not where they are locally produced, but on other tissues of the body. 
4. Hormones are required in very small amounts and their effect may be excitatory or inhibitory depending upon their concentration and the physiological state of the responding tissue. Hence, All of the following statements are true about hormones except They must be present in large quantities to have an effect. 
So, the correct answer is 'They must be present in large quantities to have an effect'.  
Multiple choice zoology endocrine system and chemical co-ordination classification of hormones endocrine system and hormone hormones and metabolism

Choose the peptide hormone from the following

  1. adrenaline

  2. Insulin

  3. Testosterone

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

Peptide hormones are the one which have single or multiple long amino acid chain/s. Insulin is a peptide hormone with two amino acid chains, one with 21 and other with 30 amino acids. This makes option B correct. 

Multiple choice zoology endocrine system and chemical co-ordination classification of hormones endocrine system and hormone hormones and metabolism

Identify the incorrect pair.

  1. Fatty acid- Insulin

  2. Glucose- Chitin

  3. Thymine- Nucleotide

  4. Amino acid- Hemoglobin

  5. Nitrogen- Uric acid
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Chitin is a polymer of N-acetyl glucosamine which in turn is a derivative of glucose. 

Thymine one of the purine (nitrogenous base) that makes deoxyribonucleotide units of DNA. 
Hemoglobin has four protein subunits, two alpha-globin and two beta-globin. Uric acid is a heterocyclic compound of CHON. 
Insulin is a protein hormone secreted by the pancreas.
So, the correct answer is option A.

Multiple choice zoology endocrine system and chemical co-ordination classification of hormones endocrine system and hormone hormones and metabolism

Chemically hormones are

  1. Biogenetic amines only

  2. Proteins, steroids and biogenetic amines

  3. Proteins only

  4. Steroids only
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Hormones are certain essential substances in our bodies that are released by our body's endocrine system.  They are chemical messengers in our bodies that transmit messages for the action of various glands in our bodies and their secretions. 

Hormones are made up of certain chemical substances like proteins,  steroids and biogenetic amines. So, option B " proteins, steroids and biogenetic amine" is the correct option.

Multiple choice zoology endocrine system and chemical co-ordination classification of hormones endocrine system and hormone hormones and metabolism

With increasing age, secretion of which of the following reduces to almost half?

  1. GTH

  2. Melatonin

  3. Estrogen

  4. ADH
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
The primary function of estrogen is development of female secondary sexual characters. These include breasts, endometrium, regulation of the menstrual cycle, etc. In males, estrogen regulates certain functions of the reproductive system important for maturation of sperms. The loss of estrogen is a central feature of menopause, which usually occurs around age 50. However, estrogen production begins to decline in most women before they turn 40. 
So, the correct option is 'Estrogen'.
Multiple choice zoology endocrine system and chemical co-ordination classification of hormones endocrine system and hormone hormones and metabolism

Epinepherine is

  1. Nephrostomal part of mesoderm

  2. Clusters of glomeruli in mammalian kidney

  3. Hormone of the adrenal gland

  4. Frontal lobe of nephritides
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The chromatin cells of adrenal medulla synthesize two hormones adrenaline or epinephrine (80%) and noradrenaline or norepinephrine (20%).