Your metabolic rate is influenced by many factors – including age, gender, muscle-to-fat ratio, amount of physical activity and hormone function.
What affects basal metabolic rate quizlet?
Gender and weight can affect basal metabolic rates. Basal metabolic rate is dependent upon age and genetics.
What hormone affects basal metabolic rate?
The basal metabolic rate, which is the amount of calories required by the body at rest, is determined by two hormones produced by the thyroid gland: thyroxine, also known as tetraiodothyronine or T4, and triiodothyronine, also known as T3.
What are factors that can increase or decrease BMR explain each quizlet?
Terms in this set (13)
- AGE. lean body mass diminishes with age, slowing the BMR.
- HEIGHT. in tall, thin people, the BMR is higher.
- GROWTH. in children, teens and pregnant women the BMR is higher.
- BODY COMPOSITION (gender) more lean tissue means higher BMR. …
- FEVER. …
- Stresses. …
- Environmental temperature. …
What are the 3 factors that affect an animal’s metabolic rate?
If such future studies yield results similar to those of our study, then three factors may largely account for the enormous range of species variation in metabolic rate: body mass, higher-level taxonomic affiliation, and the conditions of environmental productivity or food availability under which an animal has evolved …
What can decrease basal metabolic rate?
Crash dieting, starving or fasting – eating too few kilojoules encourages the body to slow the metabolism to conserve energy. BMR can drop by up to 15 per cent and if lean muscle tissue is also lost, this further reduces BMR.
What lowers the basal metabolic rate quizlet?
An over-secretion of thyroid hormones (hyperthyroidism) speeds up BMR; under-secretion of thyroid hormones (hypothyroidism) lowers BMR. The change may be as great as 50%. Very hot and very cold environment temperatures increases the BMR because they body expands more energy to regulate its own temperature.
Which hormone causes an increase in metabolism?
The hormones leptin and insulin, sex hormones and growth hormone influence our appetite, metabolism (the rate at which our body burns kilojoules for energy), and body fat distribution. People who are obese have levels of these hormones that encourage abnormal metabolism and the accumulation of body fat.
Which disease decreases the metabolic rate?
Thyroid disease also has a marked effect on BMR, since thyroid hormones regulate the rate of cellular metabolism. Hyperthyroidism—in which there is an increase in the production of thyroid hormones—leads to a high BMR, while hypothyroidism—in which thyroid hormones are depleted—causes a low BMR.
What hormone suppresses the appetite?
Well, let me introduce you to some hormones that do just those things: the “hunger hormones,” leptin and ghrelin. Leptin is a hormone, made by fat cells, that decreases your appetite. Ghrelin is a hormone that increases appetite, and also plays a role in body weight.
What does BMR stand for?
resting metabolic rate. Basal metabolic rate (BMR) is often used interchangeably with resting metabolic rate (RMR). While BMR is a minimum number of calories required for basic functions at rest, RMR — also called resting energy expenditure (REE) — is the number of calories that your body burns while it’s at rest.
How is BMR calculated?
There are 2 formulae used to calculate BMR, in [kcal / 24hrs] for men and women respectively: BMR for Men = 66.47 + (13.75 * weight [kg]) + (5.003 * size [cm]) − (6.755 * age [years]) BMR for Women = 655.1 + (9.563 * weight [kg]) + (1.85 * size [cm]) − (4.676 * age [years])
How does age affect BMR?
Age is one of the most important factor of changes in energy metabolism. The basal metabolic rate decreases almost linearly with age. … It is shown that the decrease in muscle mass relative to total body may be wholly responsible for the age-related decreases in basal metabolic rate.
What happens when the metabolic rate increases?
The higher it is, the more calories you burn and the easier it is to lose weight and keep it off. Having a high metabolism can also give you energy and make you feel better.
What causes an increase in metabolic rate?
Growth hormone and testosterone increase the metabolic rate by increasing basal metabolic rate. Food consumption: After consumption of a meal containing large quantities of protein, cellular chemical processes are stimulated. The metabolic rate starts increasing within one hour of food ingestion.
Does higher body temperature mean higher metabolism?
It has been known since early in the 20th century that a rise in temperature is associated with an increase in metabolic rate. Each degree C rise in temperature is associated with a 10–13% increment in oxygen consumption (18). The elevation in temperature itself is responsible for speeding up metabolism.