Detailed handwritten notes on the wace atar biology course notes include - dna technology (gene probes, recombinant dna, dna profiling), - evolution, evidence for evolution, factors that affect allele frequencies, homeostasis. Ib juniors were challenged this week to create experiments which investigated factors which affect reaction times in lincoln students reaction times are a measurement of the efficiency of what neurologists call a 'stimulus-response pathway', a pathway that 'bio-electricity' passes through the body in order to coordinate a response. Homeostasis positive feedback: does not play a part in homeostasis as it moves parameter away from norm eg, if a person breaths in highly carbonated air, co2 receptors register this and breathin rate increases causes even more co2 to be breathed in. Many factors have been shown to affect reaction times, including age, gender, physical fitness, fatigue, distraction, alcohol, personality type, and whether the stimulus is auditory or visual.
A2 biology unit 5 page 1 factors affecting the blood glucose homeostasis the factors that influence blood glucose concentration the. Thyroxin (above) is a hormone produced by the thyroid gland it's key role is in controlling the metabolism of cells if affects almost every physiological process in the body including growth and development. Homeostasis is the regulation of the internal environment of the human body to maintain its balance that means that the temperature should be regulated, blood should be regulated and this is actually very important since through blood many substances are filtered in and out of the body and transported.
The international baccalaureate organization provides the following description: group 4 students at standard level (sl) and higher level (hl) undertake a common core syllabus, a common internal assessment (ia) scheme and have some overlapping elements in the option studied. Factors affecting photosynthesis a limiting factor limits the rate at which a process can take place processes such as photosynthesis are made up of a series of small reactions it is the slowest of these reactions that determines the overall rate of photosynthesis. For more information, log on to- download the study materials here- an enzyme inhibitor is a. Human biology revision notes for a-level biology students best used with the aqa human biology specification a course, but could also be used in conjunction with other courses.
Biology forum online - discuss microbiology, biological science, microscopic forms of life, including bacteria, archea, protozoans, algae and fungi topics also relate to viruses, viroids, prions and more. Outline the factors that affect the distribution of plant species, including temperature, water, light soil ph, salinity and mineral nutrients explain the factors that affect the distribution of animal species, including temperature, water, breeding sites, food supply and territory. What is one reason that homeostasis is important the enzymes that control the biochemical reactions within cells are sensitive to changes in ph and temperature any changes to these factors reduces the efficiency of enzymes.
Homeostasis refers to the ability of the body or a cell to seek and maintain a condition of equilibrium or stability within its internal environment when dealing with external changes it is involved in the maintenance of the constant internal environment which includes the function of kidney , liver , skin , etc. 1 draw diagrams to show the four stages of mitosis in an animal cell with four chromosomes (total 5 marks) 2 outline the differences between the behaviour of the chromosomes in mitosis and meiosis. Biology: ib biology - genetic modification and biotechnology this kahoot covers the topic of genetic modification and biotechnology based on syllabus section 35 core. Ap or ib biology or general, apes or ib ess experientially • practicing student-centered learning techniques such as simulations, modeling, debates and games to increase interest and raise the level of critical thinking.
To access the entire contents of this site, you need to log in or subscribe to it click the free stuff button on the home page to access free pages or check the blog (which is also free. Homeostasis is the body's attempt to maintain a constant and balanced internal environment, which requires persistent monitoring and adjustments as conditions change homeostatic regulation is monitored and adjusted by the receptor, the command center, and the effector. Factors affecting the strength of hair, the growth of bacteria, molds or yeast experiment with hydroponics use seedlings started from seed with three types of soil and different rates of fertilizer.
Controlling other factors which affect germination and collecting a large enough data set will also be good challenges for a biology student to work out investigation of the functioning of the eyes when using paper or different electronic screens. Biology ib—course overview 2013-14 semester 1 (aug 14-dec 20) unit 1 chapters: 1-2—the nature of life-the science of biology, the chemistry of life chapter 1-the science of biology. Factors which can influence the rate of an enzyme-catalysed reaction include temperature, ph and substrate concentration factors affecting enzyme activity skill.