How body size and composition affecting the bmr, Biology

Assignment Help:

How Body size and composition affecting the BMR?

Basal and resting energy expenditures are related to body size, being most closely correlated with the size of the fat-free mass (FFM), which is the weight of the body less the weight of its fat muss. The size of the FFM generally explains about 70 to 80 percent of the variance in RMR. FFM is the metabolically active tissue in the body; what we also call as the lean body mass (LBM) and so most of the variation in BMR between people can be accounted for by the variation in their FFM. For example, athletes with greater muscular development have approximately a 5% higher basal metabolism than non-athletic individuals. Thus, exercise can help maintain a higher lean body mass and hence a higher metabolic rate. Similarly, the lower basal metabolic energy requirement of women is primarily related to their generally lower amount of lean muscle mass (more of fat mass) as compared to men. The decline in BMR with increasing age is also to some extent the consequence of changes in the relative size of organs and tissues. Further larger people (big size) have higher metabolic rates than people of smaller size. In fact, individuals with greater surface area have higher metabolic rate. To illustrate, if two people of different heights weigh the same, the taller individual with the larger body surface area will have a higher metabolic rate. In adults with higher percentages Bf body fat composition, mechanical hindrances can also increase the energy expenditure associated with certain types of activity.


Related Discussions:- How body size and composition affecting the bmr

Explain the life cycle of water, Explain the life cycle of Water? The ...

Explain the life cycle of Water? The water cycle , or hydrologic cycle, is one of the most important processes to living organisms on Earth. Consider the following facts:

Which are the main positive ions found in living beings, Which are the main...

Which are the main positive ions found in living beings? The major cations found in living beings are the sodium cation (Na+), the potassium cation (K+), the calcium cation (Ca

Predominant feature of steatorrhoea, Q. Predominant feature of steatorrhoea...

Q. Predominant feature of steatorrhoea? A predominant feature is delayed and defective absorption of fat, which results in bulky stools containing large quantities of fat (know

Purposes of patient /client records, PURPOSES OF PATIENT's /CLIENT's RECO...

PURPOSES OF PATIENT's /CLIENT's RECORDS Following purposes are served by maintaining patient's/client's records: A means of communication.  A basis on which therap

Define nutritional management of severe anorexia nervosa, Define nutritiona...

Define nutritional management of severe anorexia nervosa? The nutritional management of severe anorexia nervosa is therefore, considered in terms of three consecutive phases:

Determine the theory of evolution, What is the problem that the theory of e...

What is the problem that the theory of evolution and its rival theories try to solve? The problem that the theory of evolution, or simply evolution, and its rival theories try

Is the ventricle lumen larger during systole, Is the ventricle lumen larger...

Is the ventricle lumen larger during systole or during diastole? Systole is the stage of the cardiac cycle on which the ventricles contract. So the lumen of these chambers is d

Polyembryony, Polyembryony Presence of more than one embryo in a seed...

Polyembryony Presence of more than one embryo in a seed is termed polyembryony. The phenomenon, first discovered in orange seeds by Leeuwenhoek (1719), attracted considerable

PHYUM, HOW MANY PHYLUM OF ANIMALS?

HOW MANY PHYLUM OF ANIMALS?

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