sheath and the role of the person in the clip Students are likely to calculate the lights are turned neurotransmitters considered it important speeds of about 10 m/s. This back on. to appear on TV/in a is somewhat slower than the Ask a student to kneel B2.14 Explain the structure and video and what the speed at which an impulse is on a chair, with his/her function of a reflex arc nature of his/her accident actually transmitted along a ankles hanging down including sensory, relay was. Elicit the idea that neurone because the loosely. Gently tap the and motor neurones the spinal cord has been investigation involves many Achilles tendon at the damaged, preventing other factors (including back of the ankle and impulses from sense synapses, brain processing and the foot should swing organs below the neck students’ reaction times), outwards. reaching the brain and which slow the process down. Ask a student to sit with also preventing impulses In the body there are a range his/her legs crossed so from the brain reaching of different types of neurones, that one leg hangs the parts of the body which will transmit impulses at freely. Gently tap under below the neck. different speeds, usually the knee cap with the between 20–100 m/s. side of your hand to see the knee jerk reflex action (or patellar Equipment: stopwatch, tape reflex). measure You can point out that the ankle and knee jerk reflexes are part of a system that detects slight variations in position and causes muscles to relax and contract accordingly, helping you to stand. Digital: Reflex arc
B2.14 sheath and the role of neurotransmitters Explain the structure and function of a reflex arc including sensory, relay and motor neurones the person in the clip considered it important to appear on TV/in a video and what the nature of his/her accident was. Elicit the idea that the spinal cord has been damaged, preventing impulses from sense organs below the neck reaching the brain and also preventing impulses from the brain reaching the parts of the body below the neck. Students are likely to calculate speeds of about 10 m/s. This is somewhat slower than the speed at which an impulse is actually transmitted along a neurone because the investigation involves many other factors (including synapses, brain processing and students’ reaction times), which slow the process down. In the body there are a range of different types of neurones, which will transmit impulses at different speeds, usually between 20–100 m/s. Equipment: stopwatch, tape measure the lights are turned back on. Ask a student to kneel on a chair, with his/her ankles hanging down loosely. Gently tap the Achilles tendon at the back of the ankle and the foot should swing outwards. Ask a student to sit with his/her legs crossed so that one leg hangs freely. Gently tap under the knee cap with the side of your hand to see the knee jerk reflex action (or patellar reflex). You can point out that the ankle and knee jerk reflexes are part of a system that detects slight variations in position and causes muscles to relax and contract accordingly, helping you to stand. Digital: Reflex arc
GCSE-9-1-Science-Term-2-detailed-planning-document.docx