Context and question: Wilhelm Erb's (1874) "intensive" theory, that a pain signal can be generated by intense enough stimulation of any sensory receptor, has been soundly disproved. Some sensory fibers do not differentiate between noxious and non-noxious stimuli, while others, nociceptors, respond only to noxious, high intensity stimuli. At the peripheral end of the nociceptor, noxious stimuli generate currents that, above a given threshold, begin to send signals along the nerve fiber to the spinal cord. The "specificity" (whether it responds to thermal, chemical or mechanical features of its environment) of a nociceptor is determined by which ion channels it expresses at its peripheral end. Dozens of different types of nociceptor ion channels have so far been identified, and their exact functions are still being determined.
What is Erb Wilhelm's intensive theory?
Answer: unanswerable
Context and question: Puberty occurs through a long process and begins with a surge in hormone production, which in turn causes a number of physical changes. It is the stage of life characterized by the appearance and development of secondary sex characteristics (for example, a deeper voice and larger adam's apple in boys, and development of breasts and more curved and prominent hips in girls) and a strong shift in hormonal balance towards an adult state. This is triggered by the pituitary gland, which secretes a surge of hormonal agents into the blood stream, initiating a chain reaction to occur. The male and female gonads are subsequently activated, which puts them into a state of rapid growth and development; the triggered gonads now commence the mass production of the necessary chemicals. The testes primarily release testosterone, and the ovaries predominantly dispense estrogen. The production of these hormones increases gradually until sexual maturation is met. Some boys may develop gynecomastia due to an imbalance of sex hormones, tissue responsiveness or obesity.
An imbalance in sex hormones, tissue responsiveness, or obesity can cause what in boys?
Answer: gynecomastia
Context and question: Since the 1988 Education Reform Act, parents have a right to choose which school their child should go to or whether to not send them to school at all and to home educate them instead. The concept of "school choice" introduces the idea of competition between state schools, a fundamental change to the original "neighbourhood comprehensive" model, and is partly intended as a means by which schools that are perceived to be inferior are forced either to improve or, if hardly anyone wants to go there, to close down. Government policy is currently promoting 'specialisation' whereby parents choose a secondary school appropriate for their child's interests and skills. Most initiatives focus on parental choice and information, implementing a pseudo-market incentive to encourage better schools. This logic has underpinned the controversial league tables of school performance.
Parental choice has informed what controversial practice?
Answer:
league tables of school performance