BIOD 152 EXAM 1 QUESTIONS
1. True or false: A sensory neuron is signaling the body of a light touch.Thismeans that the
strength of the action potential is weaker than usual. Explainyour reasoning.
Answer: False There is no variation in the strength of action potentials. (Itis an all-or-nothing
response).
There is variation in the number and frequency of neurons firing.
2. Which of the following statements is true concerning the neuromuscularjunction?
Answer: The NMJ terminates on a muscle fiber.
3. What prevents continuous stimulation of a nerve synapse and how is thisaccomplished?
Answer: The short existence of neurotransmitters in the synapse preventscontinuous
stimulation. Some synapses contain enzymes that rapidly inactivate neurotransmitters and
other synapses rapidly absorb the neurotransmitter.
4. What neurotransmitter is found at the neuromuscular junctions?
Answer: Acetyl-choline (ACh)
5. What neurotransmitter helps regulate emotional response and muscletone?
Answer: Dopamine
6. True or False: Action potentials travel in multiple directions within thesame neuron.
Answer: False (only one direction in the same neuron)
7. True or False: Reflexes occur slower than a conscious decision to movefrom the brain.
Answer: False
8. Fill in the blank: In a reflex, the neuron conducts nerve
impulses along a pathway to create a response.
Answer: Motor/Efferent
9. Fill in the blank: In a reflex, the neuron conducts nerve impulsesalong a
pathway towards the central nervous system
Answer: Sensory/afferent
10. This part of a reflex is inside the CNS, made up of one or more synapses-
Answer: Integration center
11. Where is the integration center of a reflex located?
Answer: CNS (central nervoussystem)
12. Which of the following statements is false about reflexes?
Answer: Pulling a handaway from a hot flame is not a reflex; it is entirely voluntary.
1. True or false: A sensory neuron is signaling the body of a light touch.Thismeans that the
strength of the action potential is weaker than usual. Explainyour reasoning.
Answer: False There is no variation in the strength of action potentials. (Itis an all-or-nothing
response).
There is variation in the number and frequency of neurons firing.
2. Which of the following statements is true concerning the neuromuscularjunction?
Answer: The NMJ terminates on a muscle fiber.
3. What prevents continuous stimulation of a nerve synapse and how is thisaccomplished?
Answer: The short existence of neurotransmitters in the synapse preventscontinuous
stimulation. Some synapses contain enzymes that rapidly inactivate neurotransmitters and
other synapses rapidly absorb the neurotransmitter.
4. What neurotransmitter is found at the neuromuscular junctions?
Answer: Acetyl-choline (ACh)
5. What neurotransmitter helps regulate emotional response and muscletone?
Answer: Dopamine
6. True or False: Action potentials travel in multiple directions within thesame neuron.
Answer: False (only one direction in the same neuron)
7. True or False: Reflexes occur slower than a conscious decision to movefrom the brain.
Answer: False
8. Fill in the blank: In a reflex, the neuron conducts nerve
impulses along a pathway to create a response.
Answer: Motor/Efferent
9. Fill in the blank: In a reflex, the neuron conducts nerve impulsesalong a
pathway towards the central nervous system
Answer: Sensory/afferent
10. This part of a reflex is inside the CNS, made up of one or more synapses-
Answer: Integration center
11. Where is the integration center of a reflex located?
Answer: CNS (central nervoussystem)
12. Which of the following statements is false about reflexes?
Answer: Pulling a handaway from a hot flame is not a reflex; it is entirely voluntary.
