PNB 2264 Final Exam With 100% Correct Answers 2024/2025

PNB 2264 Final Exam With 100% Correct Answers 2024/2025 Yotiao is a membrane bound protein that interacts with signaling enzymes inside the cytosol, but cannot interact with molecules in the extracellular fluid. Yotiao should therefore be classified as: - An ion channel - A glycolipid - An integral membrane protein - A peripheral membrane protein - answera peripheral membrane protein Which of the following situations represents a homeostatic mechanism -After eating a large amount of salty popcorn, the amount of salt excreted in the urine increases - The scent or sight of food causes you to salivate - A person who becomes very nervous begins to sweat - After going outside on a hot day the core body temperature increases in response - answerAfter eating a large amount of salty popcorn, the amount of salt excreted in the urine increases Kyphosis can be caused by: -Torn menisci, which causes instability of the knee joint -Lower than normal mineralization of bone matrix, which decreases the tensile stretch of long bones -Lower overall density of bone with normal inorganic organic ratio, which leads to compression fractures in vertebrae -Weak abdominal muscles, leading to an exaggerated lumbar curve - answerLower overall density of bone with normal inorganic organic ratio, which leads to compression fractures in vertebrae When your blood calcium level decreases below normal, this ____ is sensed by ____ in the Parathyroid gland. Osteoclasts have the role of the ____ in this control system. - feedback, the control center, receptor - stimulus, receptors, effector - set point, receptors, efferent pathway - stimulus, the afferent pathway, effector - answerstimulus, receptors, effector The pelvic girdle includes which contribution of bones? -Acetabulum and femoral head -Ilium, ischium and pubis -clavicle, scapula and humerus -clavicle, scapula and sternum - answerIlium, ischium and pubis The cervical curvature is a normal secondary postural curvature, cover anterior, that develops as an infant learns to hold their head up (true or false) - answertrue Which of the following is characteristic of water? -Water is a poor solvent, unable to mix with polar substances -the water molecule ionizes to form H2 and O- ions -water is able to mix with and dissolve lipids such as triglycerides, oils, and steroid hormones -the oxygen in the water molecule has a partial negative charge, and the hydrogen a partial positive charge - answerthe oxygen in the water molecule has a partial negative charge, and the hydrogen a partial positive charge the articulation between C-1 (atlas) and C-2 (axis) is a ____ joint that allows the movement ____ -pivot and gliding, rotation of the head to the left and right ("no" movement) -combined symphysis and gliding, slight movements in all directions -pivot, flexion and extension of the neck ("yes" movement) -double condyloid, flexion and extension of the neck ("yes" movement) - answerpivot and gliding, rotation of the head to the left and right ("no" movement) A tear in a blood vessel that exposes collagen to blood activates platelets to become sticky and activate chemical signals, which can cause more platelets to become sticky and secrete the same chemical signals. This is an example of ____ control -closed loop, negative feedback -no -closed loop, positive feedback -feed-forward -open loop, positive feedback - answerfeed-f