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Jade Helgens
Physiology Weeks 1-6
| Question | Answer |
|---|---|
| Which of the following is a protein substance with no DNA or RNA and is thought to be the cause of mad cow disease? a. Virus b. Bacteria c. Prion d. Protozoan | C: Prion |
| Intrinsic control: a. usually involves the endocrine or nervous system. b. operates at the cellular level. c. is sometimes called autoregulation. d. operates at the system or organism level. | C: Is sometimes called autoregulation |
| The types of lipids found that form hormones, such as cortisone, estrogen, and testosterone are: a. triglycerides b. phosphoglycerides c. steroids. d. prostaglandins | C: Steroids |
| What is the most important factor in determining the physical and chemical properties of fatty acids? a. Degree of saturation b. Presence of glycerol c. Available bonds of hydrocarbons d. Polarity | A: Degree of saturation |
| Transcription can be best described as the: a. degradation of tRNA b. reading of mRNA codons by tRNA c. replication of DNA d. synthesis of mRNA | D: Synthesis of mRNA |
| The physical process by which water and solute move through a membrane when a hydrostatic pressure gradient exists across the membrane is the process of: a. dialysis b. osmosis c. diffusion d. filtration | D: Filtration |
| Which of the following is not true of diffusion? a. Uses cellular energy b. Can occur in living and nonliving cells c. May occur both into and out of the cell d. All are true | A: Uses cellular energy |
| During which stage of mitosis do the centrioles move to the opposite poles of the cell? a. Prophase b. Metaphase c. Anaphase d. Telophase | A: Prophase |
| A sequence of three bases forms a(n): a. codon b. anticodon c. amino acid d. polypeptide bond | A: Codon |
| Which of the following terms is synonymous with tumor? a. Anaplasia b. Hyperplasia c. Neoplasm d. Benign | C Neoplasm |
| If a sequence of nitrogen bases in nucleic acid were 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 |
| Twenty-three chromosomes per cell in humans is referred to as: a. haploid b. diploid c. myoid d. dioid | A: Haploid |
| Which of the following is not true of RNA? a. It is a single strand b. It contains uracil rather than thymine c. The obligatory base pairs are adenine and uracil, and guanine and cytosine d. It contains deoxyribose sugar | D: It contains deoxyribose sugar |
| A DNA molecule is characterized by all of the following except: a. double helix shape b. obligatory base pairing c. ribose sugar d. phosphate groups | C: Ribose sugar |
| A tissue is: a. a membrane that lines body cavities b. a group of similar cells that perform a common function c. a thin sheet of cells embedded in a matrix d. the most complex organizational unit of the body | B: A group of similar cells that perform a common function |
| Which of the following is not a proteoglycan found in the matrix of connective tissue? a. Glucosamine b. Collagen c. Hyaluronic acid d. All of the above are proteoglycans | B: Collagen |
| Which of the following vitamins is(are) absorbed through the skin? a. Vitamin A b. Vitamin D c. Vitamin K d. All of the above | D: All of the above |
| Bones act as a reservoir for which of the following minerals? a. Copper b. Calcium c. Phosphorus d. Both A and B | B: Calcium and C: Phosphorus |
| Which of the following is not a characteristic of the diaphysis? a. Provides a bulbous shape for attachment of muscle b. Hollow c. Composed of compact bone d. All of the above are characteristics of the diaphysis | A: Provides a bulbous shape for attachment of muscle |
| In the epiphyseal plate, the zone of hypertrophy is in the _____ layer. a. first b. second c. third d. fourth | C: Third |
| Young children’s bones have a greater risk of fracturing because of incompletely ossified bone. a. True b. False | B: False |
| 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 |
| All of the following are characteristics of smooth muscle except: a. there are no striations b. there are no T-tubules c. thin and thick filaments are aligned in sarcomeres like skeletal muscles. d. the sarcoplasmic reticula are loosely organized | C: Thin and thick filaments are aligned in sarcomeres like skeletal muscles. |
| 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 |
| Which of the following statements is incorrect about motor units? a. Neurons stimulate a few dozen muscle fibers b. Neurons stimulate a few thousand muscle fibers c. The more fibers stimulated, the more precise the movements can be d. All are correct | C:The more muscle fibers stimulated by a motor neuron, the more precise the movements of that muscle can be |
| The type of movement possible at a synovial joint depends on the: a. amount of synovial fluid in the joint b. shape of the articulating surfaces of the bones c. presence of bursae in the joint d. Both A and B are correct | B: Shape of the articulating surfaces of the bones |
| Painful muscle contractions or involuntary twitches are called: a. tetanic contractions b. cramps c. convulsions d. fibrillations | B: Cramps |
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jhelgens
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