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Grenisha Howard
Week 14 Physiology Practice Final (1-50)
| Question | Answer |
|---|---|
| Positive-feedback control systems: | Accelerate a change |
| Homeostasis can best be described as: | A state of relative constancy |
| Which of the following is a protein substance with no DNA or RNA and is thought to be the cause of mad cow disease? | Prion |
| Of the 11 major body systems, which is the lease involved in maintain homeostasis? | Reproductive |
| Shivering to try to raise your body temperature back to normal would be an example of: 1. The body trying to maintain homeostasis 2. A positive-feedback mechanism 3. A negative-feedback mechanism | 1 & 3 |
| Negative-feedback mechanisms: 1. Minimize changes in blood glucose levels 2. Maintain homeostasis 3. Are responsible for an increased rate of sweating when air temperature is higher than body temperature | All of the above |
| The term that literally means self-immunity is: | Autoimmunity |
| The contraction of the uterus during the birth of a baby is an example of ____ feedback. | Positive |
| The body's thermostat is located in the: | Hypothalamus |
| Negative-feedback control systems: | Oppose a change |
| Of the pathogenic organisms, which of the following are the most complex? 1. Viruses 2. Tapeworms 3. Bacteria 4. Protozoa | Tapeworms |
| Which of the following may put one at risk for developing a given disease? 1. Environment 2. Stress 3. Lifestyle | All of the above |
| Intracellular parasites that consist of DNA or RNA surrounded by a protein coat and sometimes by a lipoprotein envelope are called: | Viruses |
| Pathogenesis can be defined as: | The course of disease development |
| 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 |
| Which lipid is part of vitamin D? | Steriods |
| What is the most important factor in determining the physical and chemical properties of fatty acids? | Degree of saturation |
| Which lipid acts as a "tissue hormone"? | Prostaglandin |
| Unsaturated fats: | Will kink or bend because of the double bond between the carbon atoms |
| The basic building blocks of fats are: | Fatty acids and glycerol |
| A ________ is a functional group that is temporarily unattached and is highly reactive because of unpaired electrons. | Free radical |
| The formation of sucrose involves the removal of a molecule of water. This is called: | Dehydration synthesis |
| Which of the following is not true of RNA? 1. It contains ribose sugars 2. It contains adenine 3. It is composed of smaller molecules called nucleotides | All of the above are true |
| The roles played by proteins can be divided into which catagories? | Structural and functional |
| DNA: | Is a double-helix strand of nucleotides |
| Sometimes referred to as animal starch, _____ is the main polysaccharide in the body. | Glycogen |
| Prostaglandins and steroids share which of the following characteristics? | Both have a ring structure in their molecule |
| If one side of a DNA molecule is CTAGGCTG, the other side would be: | GATCCGAC |
| All of the following substances are organic except: | Electrolytes |
| Which type of connective tissue helps newborns maintain body temperature by producing heat? | Brown fat |
| Which of the following is not a characteristic of muscle tissue? 1. Cells are specialized to contract 2. Produces movement for the body 3. Generates heat for the body 4. Cells are separated by a large quantity of extracellular matrix | Cells are separated by a large quantity of extracellular matrix |
| Basement membrane is composed of molecules made by _____ tissue. | Connective and Epethelial |
| The type of tissue that contains cells called neurons is called: | Nervous |
| Which type of tissue has the greatest capacity to regenerate? | Epithelial |
| Which tissue is most likely to form a keloid scar as it heals? | Connective |
| Which cells form the blood-brain barrier that protects the brain from harmful substances in the blood? | Astrocytes |
| Of the five epidermal cell layers, the only one that can undergo mitosis is the stratum: | Basale |
| Which cells help destroy pathogens and damaged tissue in the brain? | Microglia |
| Connective tissue forms from stem cell tissue called: | Mesenchyme |
| Which of the following is not a function of the skin? | Synthesis of vitamin E |
| The papillary layer of the dermis: | produces the ridges that make fingerprints |
| Which is not a function of epithelial tissue: | Assimilation |
| Which of the following is not a characteristic of skeletal muscles? | Having on nucleus per cell |
| The area referred to as true skin is the: | Dermis |
| The cell organelles that synthesize organic matrix substances in bone formation are: | Endoplasmic reticulum and Golgi apparatus |
| Blood calcium levels involve secretion of which two hormones: | Parathyroid and calcitonin |
| The humerus articulates proximally with the ______. | Scapula |
| Normally, bone loss will begin to exceed bone gain between the ages of ____ years. | 35 and 40 |
| An age-related skeletal disease that is characterized by loss of bone mineral density and increased bone fragility is ________. | Osteoporosis |
| Which of the following is not true of carbohydrates? 1. They include substances commonly called sugars 2. They are the body's primary source of energy 3. They are a part of both DNA and RNA | All of the above are true |
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Grenisha
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