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Ask QuestionPosted by Priya Parjapati 5 years, 9 months ago
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Divya Waliya 5 years, 9 months ago
Divya Waliya 5 years, 9 months ago
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Yogita Ingle 5 years, 9 months ago
Anatomy is a branch of the biological science which is concerned with the description of body structures of various living organisms as revealed by dissection.
The word anatomy is derived from the Greek word “anatomē”, where “ana” means “up” and “tome” means to “cutting.” Originally, anatomy was first learnt by cutting up corpses, hence the name “anatomy.”
Posted by Veer Singh 5 years, 9 months ago
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Posted by Moumita Mondal 5 years, 9 months ago
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Yogita Ingle 5 years, 9 months ago
The hormone insulin provide a good example to explain the mode of human action through the extracellular receptors. The membrane bound receptor of insulin is a protein consisting of four subunits : the two a-subunits and two p-subunits. The following are the steps in this mechanism :
(a) Binding to the receptor : Insulin binds with the outer a-subunits of the receptor. This causes a structural change in the p-subunits, to become an activated kinase, which promotes phosphorylation.
(b) Second Messengers : The hormonal control of cell function is done through adenylate cyclase. The hormone receptor complex does not directly stimulates adenylate cyclase. It is done through a transducer G protein. The hormone receptor
complex induces the release of GDP from the G protein. It makes phosphatidylinositol which activates other processes.
© Amplification of signal : Mediates amplifier signals. The P-subunit activates DG and IP3 with second messenger. Some hormones use secondary messenger cAMP. Adenyl cyclase is amplifier. It changes Adenyl cyclase into ATP and then into cAMP. Adrenaline binds to receptors in liver or muscles cells which changes shape and binds to G protein. Then it binds to GTP and activates adenyl cyclase. This adrenaline releases 100 million moles of glucose (C5Hi2Ofi) in one or two minutes.
Posted by Moumita Mondal 5 years, 9 months ago
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Yogita Ingle 5 years, 9 months ago
- Facilitated diffusion is the passive transport of molecules along their concentration gradient across a biological membrane with the help of special proteins.
- The proteins form channels in the membrane for molecules to pass through.
Posted by Priyanshi Srivastava 5 years, 9 months ago
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Yogita Ingle 5 years, 9 months ago
It is clear, colorless fluid which is also known as hyaloplasm or cytosol. It contains different kinds of inorganic and organic chemical compounds like water, minerals, sugar, amino acids, RNA, nucleotides etc. Nucleotides are the monomers of nucleic acid like DNA and RNA.
Posted by Ruban P A 5 years, 9 months ago
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Yogita Ingle 5 years, 9 months ago
he transport of material into and out of the cells is carried out by a number of methods. These are diffusion, faciliated diffusion and active transport. Diffusion : Diffusion occurs from region of higher concentration to region of lower concentration across the permeable membrane. It is passive and slow process. No energy expenditure takes place.
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Meghna Thapar 5 years, 6 months ago
The primary functions of the liver are:
- Bile production and excretion.
- Excretion of bilirubin, cholesterol, hormones, and drugs.
- Metabolism of fats, proteins, and carbohydrates.
- Enzyme activation.
- Storage of glycogen, vitamins, and minerals.
- Synthesis of plasma proteins, such as albumin, and clotting factors.
Posted by Divya Gautam 5 years, 9 months ago
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Priyanshi Srivastava 5 years, 9 months ago
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Meghna Thapar 5 years, 9 months ago
Importance of classification:
(i) It makes the study of such a wide variety of organisms easy.
(ii) It projects before us a good picture of all life forms at a glance.
(iii) It helps us understand the interrelationship among different groups of organisms.
(iv) It serves as a base for the development of other biological sciences such as biogeography etc.
(v) Various fields of applied biology such as agriculture, public health and environmental biology depends on classification of pests, disease vectors, pathogens and components of an ecosystem.
Posted by Status Ka Mela 5 years, 9 months ago
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Meghna Thapar 5 years, 9 months ago
The forebrain is the largest region as well as the most evolutionarily recent portion of our brain. It is composed of our cerebrum, which is divided into two hemispheres by the longitudinal fissure. The cerebrum is also divided into four lobes:
- The frontal lobe
- Temporal lobe
- Parietal lobe
- And the occipital lobe
Posted by Saket Mishra 5 years, 9 months ago
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Meghna Thapar 5 years, 9 months ago
The haplontic life cycle is a type of life cycle with a dominant haploid stage. The zygote of the organisms with a haplontic life cycle undergoes meiosis immediately after karyogamy in a process called the zygotic meiosis. Hence, the organism ends up in a haploid stage. The mitotic cell division of these haploid cells allows the formation of a multicellular organism with a mass of haploid cells.
Posted by Prachi Kaushik 5 years, 9 months ago
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Yogita Ingle 5 years, 9 months ago
According to Oswald Tippo blue green algae is a member of. Thallophyta .
Posted by Nisha Yadav 5 years, 9 months ago
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Meghna Thapar 5 years, 9 months ago
An amphibolic pathway is the one which is used for both breaks down and break up reactions. Krebs cycle is amphibolic because it provides the number of intermediates for the anabolic pathway. In this process, both catabolism and anabolism occurs
Posted by Nisha Yadav 5 years, 9 months ago
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Meghna Thapar 5 years, 9 months ago
Fovia centrellis is a small depression in the retina of the eye where visual acuity is highest. The centre of the field of vision is focused in this region, where retinal cones are particularly concentrated.
Posted by Harshpreet Kaur 5 years, 9 months ago
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Meghna Thapar 5 years, 9 months ago
Amino acids are organic molecules that, when linked together with other amino acids, form a protein. Amino acids are essential to life because the proteins they form are involved in virtually all cell functions. Amino acids, often referred to as the building blocks of proteins, are compounds that play many critical roles in your body. They're needed for vital processes like the building of proteins and synthesis of hormones and neurotransmitters.
Posted by Srishty Jaiswal 5 years, 10 months ago
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Meghna Thapar 5 years, 9 months ago
Partial pressure is the pressure that a gas in a mixture of gases would exert if it occupied the same volume as the mixture at the same temperature.
Posted by Aman Mehra 5 years, 10 months ago
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Meghna Thapar 5 years, 9 months ago
The thoracic cage protects the heart and lungs. It is composed of 12 pairs of ribs with their costal cartilages and the sternum. The ribs are anchored posteriorly to the 12 thoracic vertebrae. The sternum consists of the manubrium, body, and xiphoid process
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Priya Parjapati 5 years, 9 months ago
1Thank You