Instructions

In a comparison between bone and cartilage, which one of the following statements is correct? on Select one: O A. unlike bone, cartilage lacks blood vessels O B. both are able to store minerals and synthesise blood cells O C. bone grows and repairs more slowly than cartilage O D. both are classified as epithelial tissue O E both lack nerves In the kidney, atrial natriuretic peptide (ANP) stimulates vasodilatation of the afferent arteriole, which causes the radius to double. What will happen to the blood flow into the glomerulus? Select one: O A. it will decrease by 4-fold OB.it will halve O C. it will increase by 16-fold O D. it will increase by 4-fold E. it will double Which one of the following would be a good example of paracrine communication between cells? Select one: O A. ions passing through gap junctions between cells O B. release of hormones from the hypothalamus and their actions on the anterior pituitary gland O C. signals from sympathetic autonomic nerves to the heart O D. positive feedback actions of oxytocin on the uterus during childbirth O E actions of insulin on glucagon secretion within the pancreatic islets of Langerhans Timmy is running in the London Marathon. A number of mechanisms ensure that his skeletal muscles are adequately supplied with oxygen except Select one: O A increased heart rate due to activation of cardiac calcium channels by adrenaline O B. vasodilatation of the splanchnic circulation induced by the sympathetic nervous system O C. vasodilatation of arterioles in skeletal muscle induced by metabolic autoregulation O D. recruitment of the ventral respiratory group (VRG) in the brainstem to increase ventilatory effort O E unloading of oxygen from haemoglobin in skeletal muscle due to the Bohr effect

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