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Which of the following are true for ventilation?
A. The problems with ventilation induced by injection of curare occur because of the drug's direct action on nicotinic ACh Receptors (nAChRs) in the sarcoplasmic reticulum membranes of the respiratory muscles (the diaphragm and the rib-cage muscles).
B. An increase in the hydrogen ion concentration in the interstitial spaces of the brain stem leads to a decrease in the duration of the respiratory cycle (duration of respiratory cycle equals duration of inspiration plus duration of expiration).
C. When the pressure within the alveoli is greater than atmospheric pressure, there will be inspiration of air into the lungs.
Q. Effects of smoking on oesophagitis? 1. A decrease in pyloric sphincter pressure which may predispose an individual to duodenal ulcer. 2. An alteration in the nature of ga
Herbicide tolerant crops (HTC) Increased use of the herbicides plant is tolerant to (describes ecological impact eg toxic residues in soil, runoff into waterways) Ther
Describe in brief about the Boron - Micronutrients Boron is required in extremely small amounts in the range of 0.01 to 1.0 ppm. The actual amount may vary from crop to crop
Two homologous human chromosomes have the following structure: --A--B-.-C--D--E--F--G--H--I--J-- --A--D--C-.-B--E--F--G--J--I--H-- where the letters represent genetic markers and t
defination
Define Muscular strength component for physical fitness? It is the ability of a muscle to exert force for a brief period of time. Upper-body strength, for example, can be measu
What problem would most likely to occur if a haploid cell attempted to perform meiosis? a.The cell could not replicate its DNA prior to meiosis. b.The cell could not pair hom
Is transportation of gases in tracheophytes made through the vascular tissues? Carbon dioxide and oxygen are not transported by the xylem or phloem. These gases reach the cells
How are mineral salts, water and food (sugar) transported throughout the plant? Mineral salts, Water and sugar are transported throughout the plant through conductive vessels f
does crossing over occur in all the homologous chromosomes???
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