Welcome to your AQA A2 Biology 1 Which of the following does not occur when the blood glucose level rises? Glycogen is converted into glucose. Beta cells of islets of langerhans secrete insulin. Permeability of body tissues such as liver, muscle and fat cells for glucose is increased. Secretion of glucagon from alpha cells is reduced.Specialized sensory neurones in the hypothalamus to monitor the water potential of blood. Thermoreceptors Mechanoreceptors Stretch receptors OsmoreceptorsWhich is not a feature of receptors? They are designed to receive a specific stimulus. They contain sensitive receptor cells which respond to a minimum threshold level. They do not contain special types of cells. They act as transducers.What is the role of enzyme glucokinase? Digestion of lipids. Coversion of proteins into amino acids. Converts glucose into glycogen. Phosphorylation of glucose.Select the incorrect statement regarding the Nitrogen cycle. Biological fixation of atmospheric nitrogen is performed by 2 ways. Nitrogen gas reacts with water in the rain due to lightening. Soil receives nitric acid from biological fixation. Atmospheric nitrogen fixation takes place in 2 major ways.Select the incorrect sentence out of the following. Soil contains only 2 types of micro organisms. Most plants obtain their essential minerals from the soil. Cyanobacteria is a micro organism present in the soil. Soil micro organisms play an important role in releasing nutrients.Which of the following does not respond to changes in temperature? Pacinian corpuscle Free nerve ends Krause end bulbs Ruffini corpusclesSelect the correct statement regarding cones. Cones are important for daytime vision. They are sensitive to low light intensities. They are cylindrical cells. They contain rhodopsin.A group of specialized cells which can detect chnages in the environment called stimuli. Effectors Spinal cord Neurotransmitters ReceptorsThe process where dead plant and animal matter is being converted into fine brown particles by soil micro organisms. Mineralization Carbon fixation Formation of humus Nitrogen fixationWhy is adrenaline secreted when the environmenatl temperature is low? To decrease the rate of heat production in the liver. To increase the blood flow throughout the body. To decrease the production of sweat. To increase the rate of heat production in the liver.Which is not a role of soil micro organisms in relation to the growth of plants? Help in absorption of nutrients Fixation of nitrogen Formation of soil aggregation Fixation of PotassiumWhich is not a physiological response for decreased environmental temperature? Decreased production of sweat. Vasoconstriction Increased secretion of adrenaline. Huddling together around a campfire.Select the incorrect statement regarding diabetes. Type2 diabetes begins relatively late in life. People with type2 diabetes rarely need to have insulin injections. The symptoms of both types of diabetes mellitus are different. People with type1 diabetes receive regular injections of insulin.What type of GLUT transporter is found in brain cells? GLUT5 GLUT4 GLUT2 GLUT1Which of the following does not affect the growth of soil micro organisms? Amount of minerals Porosity of the soil Gases such as Helium WaterWhat type of GLUT transporter is found in muscle cells? GLUT2 GLUT1 GLUT4 GLUT3Which of the following factor is not regulated by the kidney? Blood pressure Blood pH value Blood oxygen level Osmotic pressure of bloodWhich of the following is not an example of an effector in action? A muscle contracting to move the arm. A muscle squeezing saliva from the salivary gland. An injury due to an accidental fall. A gland releasing a hormone into the blood.Select the incorrect statement regarding alleles. The alleles could be homozygous or heterozygous in a haploid organism. There may be many alleles of a single gene. The inheritance of alleles and their dominance could be represented in a punnett square. Alleles could be dominant, recessive or codominant.Time is Up!