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Shoua L
Physiology Weeks 1-6 (Assignment 1)
| Question | Answer |
|---|---|
| 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. |
| Intracellular parasites that consist of DNA or RNA surrounded by a protein coat and sometimes by a lipoprotein envelope are called: A. viruses B. bacteria C. fungi D. protozoa | A. viruses |
| Which lipid is part of vitamin D? A. Glycerol B. Steroids C. Prostaglandins D. Fatty acids | B. Steroids |
| The type of lipoprotein associated with “bad” cholesterol and the production of atherosclerotic changes in blood vessels is: A. HDL B. LDL C. VHDL D. none of the above. | B. LDL |
| Which of the following is not true of carbohydrates? A. They include substances commonly called sugars B. They are the body’s primary source of energy C. They are a part of both DNA and RNA D. All of the above are true of carbohydrates | D. All of the above are true of carbohydrates |
| Which of the following is not true of RNA? A. It contains ribose sugar B. It contains adenine C. It is composed of smaller molecules called nucleotides D. All of the above are true of RNA | D. All of the above are true of RNA |
| Phagocytosis is an example of: A. exocytosis B. endocytosis C. passive transport D. facilitated diffusion | B. endocytosis |
| Twenty-three chromosomes per cell in humans is referred to as: A. haploid B. diploid C. myoid D. dioid | A. haploid |
| A sequence of nitrogen bases in nucleic acid are A-U-C-G-A, which of the following would be true about the nucleic acid? A. It contains deoxyribose sugar B. It could be found only in the nucleus C. It contains ribose sugar D. Both A and B are true | C. It contains ribose sugar |
| Of the five epidermal cell layers, the only one that can undergo mitosis is the stratum: A. basale B. lucidum C. corneum D. granulosum | A. basale |
| Which of the following is not a characteristic of muscle tissue? A. Cells are specialized to contract B. Produces movement for the body C. Generates heat for the body D. Cells are separated by a large quantity of extracellular matrix | D. Cells are separated by a large quantity of extracellular matrix |
| Which of the following may cause skeletal variations? A. Inadequate supply of calcium and vitamin D B. Mechanical stress C. Age D. All of the above may cause skeletal variations | D. All of the above may cause skeletal variations |
| The cell organelles that synthesize organic matrix substances in bone formation are: A. mitochondria and Golgi apparatus B. ribosomes and Golgi apparatus C. endoplasmic reticulum and ribosomes D. endoplasmic reticulum and Golgi apparatus | D. endoplasmic reticulum and Golgi apparatus |
| Which of the following is not a part of the neuromuscular junction? A. T-tubules B. Motor neuron C. Motor end plate D. All of the structures are part of the neuromuscular junction | A. T-tubules |
| Painful muscle contractions or involuntary twitches are called: A. tetanic contractions B. cramps C. convulsions D. fibrillations | B. cramps |
| The mechanisms that produce and maintain the resting membrane potential do so by producing a: | slight excess of positive ions on the outer surface of the plasma membrane |
| Neurons are the only living cells that maintain a difference in the concentration of ions across their membranes. True or False | False - Neurons are the only living cells that maintain a difference in the concentration of ions across their membranes. |
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Shoualor83
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