BIO 256

Bio 256 Exam 1 Questions with complete Solutions

Bio 256 Actual Exam Questions with Correct Answers Signal Transduction Mechanisms - Answer-• Cell-‐cell contact signaling - important in normal development and immunity • Electrical signaling - voltage-‐gated ion channels in nerve and muscle tissue - Channel opens in response to a change in the membrane potential • Voltage across a membrane due to differential concentration and charges of ions inside/outside the cell • Chemical signaling - ligand gated ion channels dete...

BIO 256 Exam 1 Review Questions and Answers function of saliva - Answer-begins starch and fat digestion, inhibits bacterial growth, binds food together to form bolus, dissolves molecules to stimulate taste buds two enzymes in the saliva - Answer-salivary amylase and lingual lipase salivary amylase function - Answer-begins starch digestion and breaks down polysaccharides lingual lipase function - Answer-activated by stomach acid and digests fat after food is swallowed and breaks down ...

Bio 256 Exam 3 Questions and Answers which of these is NOT a complication of aplastic anemia - Answer-hypertension which of the following is likely during vigorous exercise - Answer-capillaries of the active muscles will be engorged with blood the velocity of blood flow - Answer-is slowest in the capillaries because the total cross sectional area is the greatest which of the following factors does NOT influence heart rate? - Answer-skin color a motor neuron and the myofibers it ...

Bio 256 Exam 4 Questions with Correct Answers Inspiration occurs with - Answer-alveolar pressure less than atmospheric pressure Surface tension exists in alveoli because - Answer-polar water molecules are more strongly attracted to each other than to gas molecules in the air. The lung volume representing the total volume of exchangeable air is the - Answer-vital capacity. Boyle's law states that - Answer-when the pressure of a given mass of an ideal gas is inversely proportional to ...

Bio 256 Exam Questions with Complete Solutions (100% Pass) A steroid may be best described as a - Answer-lipid consisting of four carbon rings and various functional groups Saturated fatty acids have _____ double bonds - Answer-no Which is the part differing in the various amino acids? - Answer-side chain (-R) We have a much greater variety of proteins than polysaccharides in the body, mainly because - Answer-there are 20 different amino acid building blocks from which protein molecu...

Bio 256 Exam Questions with Complete Solutions (Definite Pass) Which is NOT part of an amino acid? - Answer-ribose After amino acids are assembled into a polypeptide chain, the chain often coils into a spring-like structure called the alpha helix. This coiling is due to ____. - Answer-hydrogen bonds Collagen is a ____ protein. - Answer-fibrous Which is NOT a function of proteins? - Answer-provide genetic code Which nitrogenous base is NOT found in DNA? - Answer-uracil RNA is ...

BIO 256 Exam Questions with Verified Answers The favored fuel of the liver is - Answer-fatty acids When cells move substances in vesicles into the extracellular space it is called - Answer-exocytosis Red blood cells placed in a hypotonic solution will exhibit - Answer-hemolysis Intracellular and extracellular fluids are separated by - Answer-plasma membrane What is the major cause of the underlying rapid aging disease, Progeria? - Answer-A single nucleotide change in the LMNA gene...

BIO 256 Exam Study Guide Questions with Correct Answers In an isotonic contraction, the muscle - Answer-changes in length and moves the "load" A sustained and frequent muscles stimulus brings about - Answer-tetanus Athletes sometimes complain of oxygen debt, a condition that results when insufficient oxygen is available to completely break down pyruvic acid. As a result the pyruvic acid is converted to - Answer-lactic acid Which serves as a quick source to replete ATP in exercising...