Froggy Jumps Biology: Nerves, Reflexes & HomeostasisOnline version Challenge questions on nerves, reflexes, and body control. by Marie Sourt 1 What carries a nerve impulse from the receptor to the spinal cord in a reflex arc? a Interneuron b Sensory neurone c Motor neurone 2 Which part of the eye contains rods and cones? a Retina b Cornea c Iris 3 Pacinian corpuscles detect which type of stimulus? a Light b Pressure and vibration c Temperature 4 Which nerve slows heart rate via the parasympathetic pathway? a Vagus nerve b Phrenic nerve c Accelerator nerve 5 Which ion movement is crucial for repolarisation in an action potential? a Potassium ions moving out b Sodium ions moving in c Calcium ions moving in 6 What is the resting membrane potential of a typical neuron? a 0 mV b -90 mV c -70 mV 7 Which brain structure initiates the heartbeat as the pacemaker? a Medulla oblongata b Sinoatrial (SA) node c Atrioventricular (AV) node 8 Which process describes the release of neurotransmitter into the synaptic cleft? a Passive diffusion b Exocytosis of vesicles c Endocytosis of receptors 9 What happens to acetylcholine after its action at the NMJ to stop stimulation? a Diffuses away unchanged b Broken down by acetylcholinesterase c Reabsorbed intact into vesicles 10 Which sense receptor detects light changes in the retina? a Mechanoreceptors b Photoreceptors c Chemoreceptors
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