Answer the following statements true (T) or false (F)
1. The alveolar ventilation rate is the best index of effective ventilation.
2. In chronic bronchitis, mucus production is decreased and this leads to the inflammation and fibrosis of the mucosal lining of the bronchial tree.
3. Labored breathing is termed dyspnea
4. The largest amount of carbon dioxide is transported in the bloodstream in the form of carbonic anhydrase.
5. Increased temperature results in decreased O2 unloading from hemoglobin.
1. TRUE
2. FALSE
3. TRUE
4. FALSE
5. FALSE
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Why has pulse pressure disappeared by the time blood reaches capillary beds? Because __________.
A. the elastic arteries are too stretchy B. veins are too thin to accommodate the pulse pressure C. diastole lasts longer than systole D. the muscular arterioles do not exhibit elastic rebound
The patellar or knee-jerk reflex involves ________
A) stimulatory nerve impulses to both quadriceps and the hamstrings B) inhibitory nerve impulses to both quadriceps and the hamstrings C) stimulatory nerve impulses to the quadriceps and inhibitory impulses to the hamstrings D) stimulatory nerve impulses to the hamstrings and inhibitory impulses to the quadriceps
One cause of spastic paralysis might be
A. inhibition of acetylcholine molecules. B. blockage of acetylcholine receptors. C. inhibition of acetylcholinesterase. D. destruction of synaptic vesicles. E. increase in the amount of acetylcholinesterase.
Which of the skin layers below is the most superficial?
A. Basal lamina B. Epidermis C. Reticular layer D. Papillary layer E. Hypodermis