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Physiology
| Question | Answer |
|---|---|
| A neurologist is using a voltmeter to measure potential. The membrane potential of a neuron was recorded at +30 mV. This is what type of membrane potential? | Action |
| A synapse can occur only between an axon and: | a cell body, another axon, or a dendrite |
| To accomplish self-regulation, a highly complex and integrated communication control system or network is required. This type of network is called a(n) | feedback control loop. |
| 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. |
| Intracellular parasites that consist of DNA or RNA surrounded by a protein coat and sometimes by a lipoprotein envelope are called: | viruses. |
| Positive-feedback control systems: | accelerate a change. |
| Of the pathogenic organisms, which of the following are the most complex? | Tapeworms |
| 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 |
| A triglyceride is composed of a glycerol molecule and three of the same type of fatty acid. | False |
| A very large molecule composed of subunits of sugar, a nitrogen base, and a phosphate bond is a | nucleic acid. |
| RNA and DNA have the same pyrimidine bases but different purine bases. | False |
| Which of the following is polymer of glucose that is sometimes referred to as animal starch? | Glycogen |
| A structural lipid found in the cell membrane is a: | phospholipid and steroid |
| All of the following are examples of passive transport except: | endocytosis. |
| In which stage of mitosis do chromosomes move to the opposite ends of the cells along the spindle fibers? | anaphase |
| RNA makes proteins by | translation. |
| The result of meiosis is | four daughter cells that are haploid. |
| Osmosis can be defined as | the net movement of water molecules from a region of lower solute concentration to a region of higher solute concentration. |
| Which skin layer has cells that look prickly because of the desmosomes that join the cells together? | Stratum spinosum |
| Which type of tissue has the greatest capacity to regenerate? | Epithelial |
| What is are the two types/functions of bone marrow? | Red & yellow – produces red blood cells and stores energy as fat. |
| Why is cartilage slow to heal. | Because it is semi-solid and flexible and has no or limited blood supply |
| The cell organelles that synthesize organic matrix substances in bone formation are: | endoplasmic reticulum and ribosomes. |
| Which of the following may cause skeletal variations? | age, mechanical stress, Inadequate supply of calcium and vitamin D |
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lizzgonzalez
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