BIOD 152 Module 1 exam (Portage learning) with correct answers

BIOD 152 Spring 2022. This is a bundle of axons found in the peripheral nervous system. This part of the autonomic system increases digestion. The dorsal root of a nerve contains what type of neurons? This part of a neuron conducts nerve impulses away from the cell body. A neuron going to the bicep of the forearm is part of the: A. central nervous system B. peripheral nervous system C. Autonomic system D. Somatic system E. A&C F. B&D The neuron pictured, below, is best described as: A. Bipolar B. Multipolar C. Unipolar D. Pseudounipolar True or false: Neurons do not physically touch one another. Describe the synthesis and storage of neurotransmitters. An efferent neuron carries information: A. From the central to the peripheral nervous system B. From the peripheral to the central nervous system C. Within the central nervous system D. Within the peripheral nervous system A postsynaptic neuron would be found: A. before the synapse B. after the synapse C. inside the synapse D. Only in the central nervous system What is the location and function of Satellite cells? A patient's spinal cord was severed in a car accident. Would the patient be expected to regrow axons in their spinal cord? Why or why not? Name and describe what is occurring in the neuron cell membrane in section 4 of the diagram. Include the charge of the membrane during this phase. Correct ANS- This is phase 4: afterpolarization (hyperpolarization), the potassium gates are slow to clse and that results in an undershoot of the potential, the voltage will drop below -70mV and the return to the restign state beings. At rest, a neuron plasma membrane is: A. -70 mV B. +40 mV C. Hyperpolarized D. Depolarized Which of the following is false concerning the sodium-potassium pump? A. it maintains the resting phase of an axon B. For every three sodium ions pumped out, two potassium ions are pumped in C. it must remain in constant operation to maintain the resting state D. The overall effect is a negative charge on the outside of the membrane True or false: A sensory neuron is signaling the body of extreme pain. This means that the strength of the action potential is greater than usual. Explain your reasoning Which of the following statements is false concerning the neuromuscular junction? A. Sodium ions release from the presynaptic motor neuron B. Calcium ions release from the sarcoplasmic reticulum to cause muscle contraction C. Sodium channels open on the muscle fibers in response to the neurotransmitter D. The NMJ is found in the peripheral nervous system What prevents continuous stimulation of a nerve synapse and how is this accomplished? What neurotransmitter is found at the neuromuscular junctions? True or False: Action potentials travel in multiple directions within the same neuron. True or False: Reflexes occur only with conscious intervention from the brain Fill in the blank: In a reflex, the ____________ neuron conducts nerve impulses along a pathway towards the central nervous system. Where is the integration center of a reflex located? Which of the following is false about reflexes? A. Reflexes do not require higher levels of voluntary processing from the brain B.Regulation of blood sugar by hormones is one example of a reflex C. Some reflexes can be tested to determine injury D. Pulling a hand away from a hot flame is not a reflex; it is entirely voluntary What is false about the stretch reflex? A. the effect of the motor signal is to relax a muscle B. The patellar reflex test the stretch reflex of the quadriceps femoris C. The muscle is spindle detects stretch within the muscle D. Stretch reflexes help to decrease the stretch on a muscle What is true about the flexor withdrawal reflex? A. It does not involve interneurons B. It involves excitatory interneurons C. It involves inhibitory interneurons D. The effect of the reflex is to create a co-contraction of two muscles E. A&D F. B& C Your doctor taps on your patellar tendon. List out the steps, in detail, of the nervous pathway of the reflex he is testing. Include any sensory organs involved and the action of the reflex.