BIO 669 NKU Quiz 2 UPDATED ACTUAL
Exam Questions and CORRECT Answers
1. Movement of potassium down its electrochemical gradient will result in what effect on
membrane potential? - CORRECT ANSWER - A. Hyper-polarization
A stronger stimulus will result in a greater membrane depolarization of a neuron resulting in ___.
- CORRECT ANSWER - B. More frequent action potentials
All of the following are true regarding graded potential EXCEPT:
A. They can be added together for increased effect
B. They can be added to opposing potentials and be reduced in effect
C. They fade over time and distance
D. The all look alike (in amplitude) - CORRECT ANSWER - D. The all look alike (in
amplitude)
A stroke affecting the temporal lobe is most likely to show signs and symptoms affecting the -
CORRECT ANSWER - D. Patients speech or hearing
The frontal lobe is responsible for conscious: - CORRECT ANSWER - A. Control of
voluntary motor area and limbic system
The cerebellum is most responsible for: - CORRECT ANSWER - B. Control of fine motor
control and balance/posture
The beta-2 receptor, upon binding to its ligand, will result in which of the following effects? -
CORRECT ANSWER - D. Vascular smooth muscle relaxation and dilation in cardiac
arterioles
The peripheral nervous system division that arises from the thoracic and lumbar regions is the : -
CORRECT ANSWER - sympathetic
, Ephedra is a sympathomimetic, meaning it has sympathetic nervous system activating effects. As
such, it may be assumed to have all of the following side effects EXCEPT:
A. Increased heart rate
B. Increased blood pressure
C. Pale, clammy (moist) skin
D. Diarrhea and abdominal cramping - CORRECT ANSWER - D. Diarrhea and abdominal
cramping
The ___ division of the autonomic nervous system helps conserve energy and the body's
resources (rest) and uses ____ as its neurotransmitter(s). - CORRECT ANSWER - D.
Parasympathetic; acetylcholine
Saltatory conduction: - CORRECT ANSWER - C. Occurs only at the Nodes of Ranvier
Graded potentials are all of the following EXCEPT:
A. Impulses which travel without diminishing over distance
B. Localized membrane potential changes as a result of ion channels opening
C. Graded potentials can be added to achieve a combined effect on membrane potential
D. Can be either hyperpolarizing or depolarizing - CORRECT ANSWER - A. Impulses
which travel without diminishing over distance
Calcium has an equilibrium potential of 123mV. This means that under normal resting potential,
if Ca++ became more permeable the membrane potential would: - CORRECT ANSWER -
A. Become more positive until the inside of the cell became positive
The basal ganglia ( cerebral nuclei) are most involved in: - CORRECT ANSWER - D.
Inhibiting unwanted movement ( coordinating movement)
The parasympathetic nervous system is associated with which of the following: - CORRECT
ANSWER - B. Ganglia that are close to the target organ
Exam Questions and CORRECT Answers
1. Movement of potassium down its electrochemical gradient will result in what effect on
membrane potential? - CORRECT ANSWER - A. Hyper-polarization
A stronger stimulus will result in a greater membrane depolarization of a neuron resulting in ___.
- CORRECT ANSWER - B. More frequent action potentials
All of the following are true regarding graded potential EXCEPT:
A. They can be added together for increased effect
B. They can be added to opposing potentials and be reduced in effect
C. They fade over time and distance
D. The all look alike (in amplitude) - CORRECT ANSWER - D. The all look alike (in
amplitude)
A stroke affecting the temporal lobe is most likely to show signs and symptoms affecting the -
CORRECT ANSWER - D. Patients speech or hearing
The frontal lobe is responsible for conscious: - CORRECT ANSWER - A. Control of
voluntary motor area and limbic system
The cerebellum is most responsible for: - CORRECT ANSWER - B. Control of fine motor
control and balance/posture
The beta-2 receptor, upon binding to its ligand, will result in which of the following effects? -
CORRECT ANSWER - D. Vascular smooth muscle relaxation and dilation in cardiac
arterioles
The peripheral nervous system division that arises from the thoracic and lumbar regions is the : -
CORRECT ANSWER - sympathetic
, Ephedra is a sympathomimetic, meaning it has sympathetic nervous system activating effects. As
such, it may be assumed to have all of the following side effects EXCEPT:
A. Increased heart rate
B. Increased blood pressure
C. Pale, clammy (moist) skin
D. Diarrhea and abdominal cramping - CORRECT ANSWER - D. Diarrhea and abdominal
cramping
The ___ division of the autonomic nervous system helps conserve energy and the body's
resources (rest) and uses ____ as its neurotransmitter(s). - CORRECT ANSWER - D.
Parasympathetic; acetylcholine
Saltatory conduction: - CORRECT ANSWER - C. Occurs only at the Nodes of Ranvier
Graded potentials are all of the following EXCEPT:
A. Impulses which travel without diminishing over distance
B. Localized membrane potential changes as a result of ion channels opening
C. Graded potentials can be added to achieve a combined effect on membrane potential
D. Can be either hyperpolarizing or depolarizing - CORRECT ANSWER - A. Impulses
which travel without diminishing over distance
Calcium has an equilibrium potential of 123mV. This means that under normal resting potential,
if Ca++ became more permeable the membrane potential would: - CORRECT ANSWER -
A. Become more positive until the inside of the cell became positive
The basal ganglia ( cerebral nuclei) are most involved in: - CORRECT ANSWER - D.
Inhibiting unwanted movement ( coordinating movement)
The parasympathetic nervous system is associated with which of the following: - CORRECT
ANSWER - B. Ganglia that are close to the target organ
