Basal metabolism and energy expenditure at high altitude, Biology

Assignment Help:

Define Basal Metabolism and Energy Expenditure at High Altitude?

The energy and nutrient requirements depend upon total energy expenditure and metabolic rate of the individual. Total energy expenditure (TEE), as you may recall studying in Unit 2, has three components i. e, basal metabolic rate (BMR), diet induced energy expenditure and expenditure related to activities. Short-term measurements or gas exchange during field studies suggest that altitude hypoxia increases BMR. Some studies show these acute increases (20-30%) to be sustained for 1-2 weeks while others show elevation to be maintained throughout a three week stay. The decline in BMR with acclimatization seems to be the result of an inadequate energy intake and a decrease in metabolically active tissue that accompanies weight loss. The decrease in metabolic rate is expected to be approximately 20-25 Kcal /dl kg lean tissue lost. Finally, the stress of high altitude (HA) decreases over a period of time as indicated by a decrease in the epinephrine levels in both men and women. 

Increased energy expenditure ranging from 6.9 to 25% has been reported. As regards the energy cost of various activities under stationary conditions, there is no variation as compared to the sea levels. Increased energy expenditure may be due to the heavier load carried by the troops, as cold protective garments and efforts in walking in snow bound hilly terrain.


Related Discussions:- Basal metabolism and energy expenditure at high altitude

What do you understand by larval amplification, What do you understand by L...

What do you understand by Larval amplification? A form of asexual reproduction where, during life cycle, a single larval organism can produce large numbers of the next developm

Nutrient requirements for preterm and low birth weight, Define the Nutrient...

Define the Nutrient requirements for preterm and low birth weight? Energy: For preterm infants 1.20 Kcal/kg/day,            For normal infants 108 Kcal/ kg/ day. Proteins

What would be the probability of obtaining result, A plant grown from one o...

A plant grown from one of Mendel's yellow peas is selfed. Five progeny peas are obtained from this self and they are all yellow. If the original selfed plant had been homozygous, w

Aspirin, ASPIRIN - It is acetylsalicyclic acid (C 6 H 4 (OCOCH) 3 ...

ASPIRIN - It is acetylsalicyclic acid (C 6 H 4 (OCOCH) 3 CH 3 ). It changes in salicyclic acid in body. It is analgesic, antipyratic (fever reducing), anti inflamma

Entomophily - cross-pollination, Entomophily - Cross-pollination It in...

Entomophily - Cross-pollination It involves insects to carry the pollen to achieve pollination. Salvia exhibits a specialised 'tumapipe' floral mechanism that signifies classi

Explain pro-oxidants - lipid oxidation, Explain Pro-Oxidants Transitio...

Explain Pro-Oxidants Transition metals, particularly those possessing two or more valency states and a suitable oxidation - reduction potential between them (e.g., cobalt, cop

Myoglobin, Myoglobin We can build up the structure of haemoglobin by c...

Myoglobin We can build up the structure of haemoglobin by considering a single unit or monomeric form caned myoglobin. This consists of a single polypeptide chain the globin i

photosynthesis: light energy to synthesize , Photosynthesis happens in alg...

Photosynthesis happens in algae, green plants and photosynthetic bacteria. Its part is to catch solar energy and use this to drive the synthesis of carbohydrate from water and carb

Bioclimatology effect of climate on distribution of organism, Bioclimatolog...

Bioclimatology: This is the study of effect of climate on distribution of organisms. Bioclimatology is the inter-disciplinary field of science which studies the interactions betwe

State whether the factor can lead, With your understanding of bone and musc...

With your understanding of bone and muscle tissue (cells and the extracellular material) discuss two lifestyle factors (one for bone and one for muscle) that affect the growth, dev

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd