BIOH111 FINAL EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS GRADED A++ LATEST UPDATE

BIOH111 FINAL EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS GRADED A++ LATEST UPDATE functional and structural characteristics can be used to group sensory receptors into different classes. list and describe five types of sensory receptors according to the type of stimulus detected. question 7. mechanoreceptor - detects mechanical stimuli such as touch pressure or vibration. thermo-receptor - detects changes in temperature such as hot or cold. photoreceptor - eyes detect light chemoreceptor - detects chemicals in the mouth, nose and bodily fluids osmoreceptor - sense osmotic pressure of bodily fluids The autonomic nervous system is divided into sympathetic and parasympathetic divisions. describe five physiological/ fight or flight responses that occur during E situations. describe the five sludd responses that conserve and restore body energy during times of rest and recovery. Question 6. physiological fight or flight responses, E situations - dilated pupils, increased heart rate, airways dilate, decreased blood flow to kidneys and stomach, decrease digestion. S - increased salivation L - increased lacrimate U - increased urination D - increased digestion D - increased defecation choose two special senses and describe stimulus involved, structural classification and name of sensory receptor, and one associated cranial nerve include name and number. question 8. smell stimulus - odorant structural classification - 1st neuron with free nerve endings sensory receptor - olfactory receptor cells cranial nerve - CN1 Olfactory vision stimulus - light structural classification - sensory cell synapses with first order neurone sensory receptor - photoreceptor and exteroceptor cranial nerve - CNII optic an action potential is a sequence of rapidly occurring events that decrease and reverse the membrane potential and restore it to its resting state. discuss the three phases involved in an action potential by including the name of the phase, ions and channels involved, and change in MV. question 2. depolarisation - at threshold, voltage-gated NA+ channels open ( -55mV to +30mV) and sodium flows into the cell. repolarising - voltage gated K+ channels open, NA+ channels are inactivating (+30mV to -70mV)Na+ enters the cell while K+ exits the cell after hyperpolarising - voltage gated K+ channels are open, K+ exit continues (-70mV to -90mV) name and describe the function of five neurotransmitters. question 4. ACh - learning and memory serotonin - mood control GABA - cognition endorphins - pain relief dopamine - pleasure what type of nervous system function is this? detection of internal and external stimuli sensory what type of nervous system function is this? processes sensory information by analysing and making decisions for appropriate response integrative