Question

1. a curious child touched the outside of a barbecue grill containing red - hot coals. before he was even aware of what happened, he jerked his hand away. a second or two later, he felt pain and began to cry. which is the sequence of structures involved in causing the child to remove his hand? a. motor neurons, effectors, sensory neurons, interneurons b. motor neurons, interneurons, effectors, sensory neurons c. sensory neurons, motor neurons, interneurons, effectors d. sensory neurons, interneurons, motor neurons, effectors use the following information to answer question 24. activities during impulse transmission along a neuron 1. diffusion of ions 2. release of acetylcholine 3. an increase in the permeability of axon membrane 4. an increase in the use of atp 5. release of cholinesterase 6. conduction of impulse 24. after the dendrites of a neuron are stimulated, which sequence of activities occurs in the axon and the synapse? a. 3, 1, 6, 4, 2, and 5 b. 4, 3, 1, 6, 5, and 2 c. 3, 4, 1, 6, 5, and 2 d. 4, 1, 3, 6, 2, and 5 hint: does this action occur before the dendrites are stimulated or after stimulation? is this while the dendrite is polarized, or is it occurring after depolarization of the dendrite?

Explanation:

For question 23, the reflex arc sequence starts with sensory neurons detecting the heat, then interneurons in the spinal - cord process the information, followed by motor neurons sending signals to the effectors (muscles) to jerk the hand away. For question 24, when dendrites are stimulated, the axon membrane permeability increases first, then ions diffuse, impulse is conducted, ATP use increases, acetyl - choline is released, and finally cholinesterase is released to break down acetyl - choline.

Answer:

1. D. Sensory neurons, interneurons, motor neurons, effectors
2. A. 3, 1, 6, 4, 2, and 5