Energy Balance and Weight Control
What behavioral technique supports healthy body weight changes?
Which system is most affected by dehydration
The cardiovascular system
Is PKU is treated with low phenylalanine diets?
For approximately how long have humans been producing their own food with agriculture?
10,000 years
What is NOT a requirement of natural selection?
Habitat isolation
Is the state of positive energy balance is achieved when the number of Calories consumed is less than the number of Calories expended.
The purpose of the warm-up is to:
Slowly increase the pulse rate to an aerobic level.
Facilitate vascular changes (splenic shunt) to accommodate aerobic exercise.
Gear up the energy metabolism, i.e., increase the delivery of oxygen and nutrients to the working muscle, and raise the temperature to an optimal level for energy production.
Increase the elasticity of the muscle fibers, which helps to prevent muscle, tendon, ligament, and joint injuries, as well as improve muscle contraction and preserve muscle glycogen in addition to reducing the amount of lactic acid build-up in the muscles.
Albinism is a recessive trait. If a carrier for albinism has children with someone who is homozygous dominant, what are their chances of having an albino child?
What was a consequence of humans’ shift to agriculture?
Trading of food between different groups of people
What may be a characteristic of a beneficial mutation?
It facilitates successful reproduction.
Does the intensity of the exercise increases, as the percentage of carbohydrates used to produce ATP increases.
Is ninety percent of the human’s body weight is water.
What is the expected genotypic ratio of offspring of a cross between a homozygous recessive individual and a heterozygous individual?
What do conventional food production employs the use of?
Pesticides, antibiotics, hormones, and genetically modified organisms.
Organisms born with the best adaptations survive and pass on their traits to offspring. Organisms without these adaptations die and do not reproduce. Over time, the population changes as more organisms inherit the adaptation.
Darwin's Theory
An individual who is homozygous...
carries two copies of the same allele for a gene
Which of the following contributes to the highest percentage of energy expenditure?
Resting energy expenditure (REE)
The allele of one gene that is known to increase risk for Type I diabetes is recessive. What proportion of offspring will not inherit any alleles for this gene if the parents are both heterozygous?
After the decline of tobacco what did farmers switch to?
The process in which DNA changes result in new alleles
Mutation
Achondroplasia is a form of dwarfism caused by a dominant allele. The homozygous dominant genotype causes death, so individuals who have this condition are all heterozygotes. If a person with achondroplasia mates with a person who does not have achondroplasia, what percentage of their children would be expected to have achondroplasia?
Basic measure of energy in a food substance
kilocalorie
The following pedigree shows a family suffering from hemochromatosis, a disorder that affects iron absorption. Is this disorder dominant or recessive?
How many days did it used to 'grow' a chicken? How many now?
3 months, 49 days (growth hormones)
Breeding of all dogs today.
An example of artificial selection