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Heather B.
Physiology wk 1-6
| Question | Answer |
|---|---|
| Because negative feedback control systems oppose changes that are opposite in direction to the initial disturbance, they are | slowed or maintained in the homeostatic range. |
| The impact of effector activity on sensors may be positive or negative. Therefore, homeostatic control mechanisms are categorized as | organs that are directly influenced by physiological variables or mechanisms. |
| Of the pathogenic organisms, which of the following are the most complex? Viruses Tapeworms Bacteria Protozoa | Tapeworms |
| Homeostasis can best be described as: a constant state maintained by living and nonliving organisms. a state of relative constancy. adaptation to the external environment. changes in body temperature. | a state of relative constancy. |
| A triglyceride is composed of a glycerol molecule and three of the same type of fatty acid. True False | false |
| RNA and DNA have the same pyrimidine bases but different purine bases. True False | false |
| What determines how a protein performs? shape size quantity peptide bonds | shape |
| Which of the following is polymer of glucose that is sometimes referred to as animal starch? Disaccharide Polysaccharide Monosaccharide Glycogen | Glycogen |
| A structural lipid found in the cell membrane is a: triglyceride. phospholipid. steroid. Both B and C are correct. | Both B and C are correct. |
| When two molecules of glucose are joined, they form which disaccharide? Sucrose Maltose Lactose Fructose | Maltose |
| The amino group in an amino acid is: NH3+. COO–. symbolized by the letter R. SO2. | NH3+. |
| Osmosis can be defined as the net movement of water molecules from a region of higher concentration to a region of lower concentration. an excretory process. a process in which cells engulf particles. the net movement of water molecules fro | the net movement of water molecules from a region of lower solute concentration to a region of higher solute concentration. |
| If red blood cells containing 10% solute are placed in a solution containing 10% solute, what will happen? Nothing will happen. Water will move into the cells. Water will move out of the cells. Water will move into and out of the cells at e | Water will move into and out of the cells at equal rates. |
| RNA makes proteins by transcription. translation. replication. duplication. | replication. |
| Which of the following is not a characteristic of meiosis? four haploid gametes a reduction division two steps of cell division two haploid gametes | two haploid gametes |