Exam 1, BIOL252, Anatomy and Physiology (UNC-Ch)
Questions And Verified Answers Already A+.
A neuron is placed in a dish with the appropriate medium. What would happen to the
resting membrane potential if the sodium-potassium pumps are blocked?
a. Increase (a greater negative charge- hyperpolarization)
b. Decrease (a smaller negative charge- depolarization)
c. No change from the resting membrane potential when the pump is active
d. It would not reach the normal resting membrane potential - ANSWER: d. It
would not reach the normal resting membrane potential
Does the resting membrane potential increase or decrease if we decrease the
concentrations of extracellular K+?
a. Increase (a greater negative charge- hyperpolarization)
b. Decrease (a smaller negative charge- depolarization)
c. No change from the resting membrane potential when the pump is active
d. There would be no resting membrane potential - ANSWER: a. Increase (a
greater negative charge- hyperpolarization)
Given these components of a reflex arc: - ANSWER: 1. effector organ
2. interneuron
3. motor neuron
4. sensory neuron
5. sensory receptor
, Choose the correct order an action potential follows after a sensory receptor is
stimulated.
1. effector organ
2. interneuron
3. motor neuron
4. sensory neuron
5. sensory receptor - ANSWER: b. 5,4,2,3,1
Megan was recently in a car crash where she sustained some brain damage. Megan
now has trouble planning out her ordinary activities and her friends describe her as
having poor social judgment and being less inhibited in her actions. According to
Megan's new behaviors which part of her brain did she most likely damage?
a. The premotor cortex
b. The somatosensory association area
c. The prefrontal cortex
d. The primary motor cortex - ANSWER: c. The prefrontal cortex
Nick is enjoying an episode of Friends after coming home from a dinner buffet. While
his body continues to digest the food, what neurotransmitter is being released to his
target cells and what kind of receptors are located on those target cells?
a. epinephrine and a muscarinic receptor
b. norepinephrine and a muscarinic receptor
c. acetylcholine and an adrenergic receptor
d. acetylcholine and a muscarinic receptor
e. norepinephrine and an adrenergic receptor - ANSWER: d. acetylcholine and a
muscarinic receptor
Questions And Verified Answers Already A+.
A neuron is placed in a dish with the appropriate medium. What would happen to the
resting membrane potential if the sodium-potassium pumps are blocked?
a. Increase (a greater negative charge- hyperpolarization)
b. Decrease (a smaller negative charge- depolarization)
c. No change from the resting membrane potential when the pump is active
d. It would not reach the normal resting membrane potential - ANSWER: d. It
would not reach the normal resting membrane potential
Does the resting membrane potential increase or decrease if we decrease the
concentrations of extracellular K+?
a. Increase (a greater negative charge- hyperpolarization)
b. Decrease (a smaller negative charge- depolarization)
c. No change from the resting membrane potential when the pump is active
d. There would be no resting membrane potential - ANSWER: a. Increase (a
greater negative charge- hyperpolarization)
Given these components of a reflex arc: - ANSWER: 1. effector organ
2. interneuron
3. motor neuron
4. sensory neuron
5. sensory receptor
, Choose the correct order an action potential follows after a sensory receptor is
stimulated.
1. effector organ
2. interneuron
3. motor neuron
4. sensory neuron
5. sensory receptor - ANSWER: b. 5,4,2,3,1
Megan was recently in a car crash where she sustained some brain damage. Megan
now has trouble planning out her ordinary activities and her friends describe her as
having poor social judgment and being less inhibited in her actions. According to
Megan's new behaviors which part of her brain did she most likely damage?
a. The premotor cortex
b. The somatosensory association area
c. The prefrontal cortex
d. The primary motor cortex - ANSWER: c. The prefrontal cortex
Nick is enjoying an episode of Friends after coming home from a dinner buffet. While
his body continues to digest the food, what neurotransmitter is being released to his
target cells and what kind of receptors are located on those target cells?
a. epinephrine and a muscarinic receptor
b. norepinephrine and a muscarinic receptor
c. acetylcholine and an adrenergic receptor
d. acetylcholine and a muscarinic receptor
e. norepinephrine and an adrenergic receptor - ANSWER: d. acetylcholine and a
muscarinic receptor
