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What is homeostasis? Regulation of the internal conditions of a cell or organism in response to internal and external changes.
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What is homeostasis? Regulation of the internal conditions of a cell or organism in response to internal and external changes List 4 things that are controlled by homeostasis Water, Ions, Temperature and Sugar What are receptors? Cells that detect stimuli (changes in the environment) What are effectors? Muscles or glands that bring about responses that restore optimal levels What should human body temperature be?
Why does human body temperature need to stay at 37 °C? To provide an optimum temperature for enzymes to work
What is the pathway that a reflex action takes as it passes through the nervous system Stimulus, receptor, sensory neurone, relay neurone (in the CNS) motor neurone, effector What are synapses? Gaps between neurones What are hormones? Chemical messengers that are carried in the blood to a target organ where they cause an effect Which organ monitors and controls blood glucose concentrations? The pancreas Name two hormones involved with the control of blood glucose Insulin and glucagon Which hormone increases blood glucose levels? Glucagon
Which hormone reduces blood glucose levels? Insulin Give a risk factor of type 2 diabetes Obesity Name the 4 hormones involved in the control of the menstrual cycle FSH, Oestrogen, LH and Progesterone Which 2 hormones are released from the pituitary gland? FSH and LH What is the function of FSH in the menstrual cycle? Causes eggs to mature in the ovaries What is the function of LH in the menstrual cycle? Stimulates the release of an egg from the ovary