BIO 181 Practice tests (NCSU Paciulli), Exam Questions and answers, Accurate. Latest Update.

BIO 181 Practice tests (NCSU Paciulli), Exam Questions and answers, Accurate. Latest Update. The heart structure that functions as the initial receiving chamber is the: - -Right atrium The most important factor in the return of blood flow back to the heart is __________. - -valves in the veins Gas and nutrient exchange between circulation and the tissues occurs at the: - -capillaries Specialized muscle tissue that sets the pace for the conduction of electrical signals throughout the heart is known as the: - -sinoatrial node The juncture of the arterial and venous systems is found in the: - -Capillary beds The symbiotic microbes that help nourish a ruminant live mainly in specialized regions of the: - -Stomach During swallowing, which structure is "tipped" downward by the upward action of the larynx? - -Epiglottis When a bolus of food enters the esophagus, which mechanical action pushes the bolus down to the stomach? - -Peristalsis Which of the following is a secretion of the parotid gland? - -Salivary amylases The pancreas connects to which part of the alimentary canal? - -Small intestine Absorption in the small intestine is increased by: a. the many villi that are present on the inner surface of the small intestine b. the brush border formed by microvilli on the cells of the villi c. the rugae d. both answers a and b are correct - -Both a and b are correct The main function of the colon is: - -Water absorption Ulcers occur in the stomach as a result of: - -Helicobacter pylori which erodes the mucus coating in the stomach Which of the following has an incomplete digestive system? - -Hydra The folds in the stomach that allow the stomach increased surface area for expansion and holding of food are called: - -Rugae In plants, sugar compounds move in ___ direction(s) from ___ to ___: - -Two, source, sink Sugar moves in the plant via the: - -Phloem If a plant is exposed to high temperatures and drought, it will have to: - -Close its stomata to conserve water The exudation of water droplets, caused by root pressure that can be seen in the morning on the tips of grass blades is known as? - -Guttation Which of the following involves the leaves of a plant? a. Water