GMS6440 Problem Set #1 Exam Questions And Answers

Cardiac muscle contraction is considered to be voluntary movement. True or False - ANS False-- it moves involuntarily In the GI tract, smooth muscle is the major muscle type. True or False - ANS True In our body, approximately 8 liters of intestinal juices are secreted into the GI tract daily, but only 100ml of water is secreted into the feces. True or False - ANS True Normal movement of blood flow in the heart is: left atrium-- left ventricle-- right atrium -- right ventricle. True or False - ANS False. -- Right Atrium- Right Ventricle- Left Atrium- Left Ventricle Normally, humans have 2 lobes in the right lung and 3 lobes in the left lung. True or False - ANS False. -- 3 lobes in the right, 2 lobes in the left In the lung, gas exchange occurs mostly at the alveoli. True or False. - ANS True The urinary system is normally composed of two kidneys, two ureters and two bladders. True or False - ANS False. -- Two kidneys, two ureters and ONE bladder Filtered wastes from the glomerulus will move in the following order: Bowman's capsule- proximal tubule- distal tubule- loop of Henle- collecting duct. True or False. - ANS False. -- Bowman's- proximal tubule- Loop of Henle- distal tubule- collecting duct Both endocrine and nervous systems play important roles in controlling the activities of many different organ systems to maintain homeostasis. True or False - ANS True Specificity of hormone action in target cells is determined by receptors. True or False - ANS True The area of nerve axon not wrapped in myelin sheath (non-myelinated area) is called nodes of Ranvier where action potential is insulated. True or False - ANS False. -- Myelin sheath insulates action potential. the AP propagates faster by skipping the unmyelinated areas and jumping from node to node What chemical component of the plasma membrane prevents ions from readily and freely moving across the membrane? -CHO -Lipids -Proteins - ANS Lipids (the phospholipid bilayer specifically) Where is the concentration of Potassium greater: -Cytoplasm -ECF - ANS cytoplasm Across a cell's plasma membrane, movement of water is... -Passive through a channel -an active event - ANS Passive Where is the concentration of Sodium greater: -Cytoplasm -ECF - ANS ECF For a neutrally charged molecule, "active" transport means that the molecules move across a membrane: -from high to low concentration -from low to high concentration - ANS from low to high What molecule is the source of energy for primary active transport to occur? -Water -ATP -GMP - ANS ATP There is only one type of channel in cell membranes. True or False - ANS False Regarding primary active transport, solutes move from a compartment of low concentration to a compartment of high concentration. True or False - ANS True Regarding secondary active transport of glucose, the movement of glucose is from a compartment of high concentration to a compartment of low concentration. True or False - ANS False All transport through membrane channels is classified as "active" transport. True or False - ANS False