COMPREHENSIVE EXAM BIOS255 QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED

COMPREHENSIVE EXAM BIOS255 QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED Terms in this set (64) Negative feedback A process in which the body sense change and activates a mechanism to reverse it Examples of negative feedback Thermoregulation, blood sugar retention, blood pressure regulation Positive feedback Feedback that enhances the stimuli Example of positive feedback Giving birth Blood plasma does what? Produces antibodies Muscle contraction order 1. Cross bridge formation requires Ca+ & ATP 2. Ca+ binds to troponin complex 3. Conformation change in troponin Ca+/ tropomyosin exposed binding sites on G actin subunit 4. Myosin head binds to G-actin subunit release of ADP + Pi triggers "power-stroke" 5. ATP Binding & dissociation of actin & myosin 6. Myosin heads do a powerstroke (using ADP and P) which slides actin and decreases length of sarcomere (Z line to Z line) Osteoblasts function Bone formation What type of joint is the knee? Hinge joint What type of immunity do you get after a vaccine with antibodies? Artificial acquired active immunity How does pH and body temperature affect the affinity of hemoglobin and oxygen? Decreases the affinity for hemoglobin to oxygen (meaning oxygen will less likely stick to hemoglobin) What bone(s) does the tibia articulate? Femur and talus What helps alleviate water tension in the lungs and also reduces cohesion? Surfactants Where does graded potential have to reach in order for neuron firing? "Trigger zone" Axon hillock What bones make up the pectoral girdle? Clavicle and scapula Where does the phrenic nerve (that replays impulses to the diaphragm) originate? Cervical plexus External respiration The exchange of O2 and CO2 between the alveoli and the pulmonary capillaries Local graded potential Amount of stimulation determines how much sodium enters the cell Where IS cerebrospinal fluid? Subarachnoid space Tunica media is the thickest in _. Arteries Plasma protein in blood helps maintain _ , drawing fluid back to the blood. Blood Colloid Osmotic Pressure (BCOP) MAP formula DP+(PP/3) Stroke volume formula EDV - ESV