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Study Set 1

Chapters 1-6

QuestionAnswer
Shivering to try to raise your body temperature back to normal would be an example of: -the body trying to maintain homeostasis -a negative feedback
what are the basic components in a feedback control loop? effector mechanism, sensor, and integrating center
The body's thermostat is located in the: hypothalmus
Of the 11 major body systems, which is the least involved in maintaining homeostasis? reproductive
Of the pathogenic organisms, which is the most complex? Tapeworms
Intracellular parasites that consist of DNA or RNA surrounded by a protein coat and sometimes by a lipoprotein envelope are called: viruses
Epidemiology is the study of? Occurrence, distribution, and transmission of diseases in human population.
What term means self-immunity? autoimmunity
Homeostasis can best be described as? a state of relative constancy
Negative-feedback control systems is oppose a change
Positive-feedback control systems accelerate a change
Negative-feedback mechanisms: -minimize changes in blood glucose -maintain homeostasis -are responsible for an increased rate of sweating when air temperature is higher than body temperature
Intrinsic control: is sometimes called autoregulation
The normal reading or range of normal is called the? set point
Pathogenesis can be defined as? the course of disease development
Which of the following is a protein substance with now DNA or RNA and is thought to be the cause of mad cow disease? Prion
Which of the following may put one at risk for developing a given disease? Environment, stress, and lifestyle.
The contraction of the uterus during the birth of a baby is an example of ? positive feedback
If the secretion of oxytocin during childbirth operated as a negative feedback control loop, what effect would it have on uterine contractions? Oxytocin would inhibit uterine contractions
What are organic substances? lipids, carbohydrates, and proteins
What is DNA a double helix strand of nucletides
Which of the following is not true of both triglycerides and phospholipids? They both contain a hydrophobic and hydrophilic end
Peptide bonds join together molecules? amino acids
Unsaturated fats: will kink or bend because of the double bonds between the carbon atoms
Humans can synthesize 13 of 21 basic amino acids; the remaining 8, which must be included in the diet, are called: essential amino acids
What is a free radical? a functional group that is temporarily unattached and is highly reactive because of unpaired electrons.
The basic building blocks of fats are? fatty acids and glycerol
What is RNA -it contains ribose sugar -it contains adenine -it is composed of smaller molecules called nycleotides
What are amino acids frequently joined by? peptide bonds
What is dehydration synthesis? The formation of sucrose involves the removal of a molecule of water.
What are carbohydrates? -They include sugars -they are the bodies primary source of energy -they are a part of DNA and RNA
The alpha helix is an example of which level of protein structure? Secondary
Which level of protein structure refers to the number, kind, and sequence of amino acids? primary
What is the most important factor in determining the physical and chemical properties of fatty acids degree of saturation
Prostaglandins and steroids share which characteristics? Both have a ring structure in their molecule
Which energy-releasing or energy-transferring molecule does not contain a nucleotide? creatine phosphate
The type of lipoprotein associated with "bad" cholesterol and the production of atherosclerotic changes in blood vessels is? LDL
The roles played by proteins can be divided into which categories? Structural and functional
Created by: alejandrab2426
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