BIOS 242 Exam 1 ACTUAL UPDATED
QUESTION AND ANSWERS
The interior surface of a neuron's plasma membrane at resting membrane potential will have a
___________.
Positive charge and contains more sodium than outside of the cell
Negative charge and contains more sodium than outside of the cell
Negative charge and contains less sodium than outside of the cell
Positive charge and contains less sodium than outside of the cell - CORRECT
ANSWERS negative charge and contains less sodium than outside of the cell
Which of the following organs does not exhibit parasympathetic tone/domination
Heart
Urinary tract organ
Blood vessels
Digestive smooth muscle - CORRECT ANSWERS blood vessels
Which of the following would not take place during exercise or vigorous physical activity?
Increase digestive activity to supply glucose for energy
Increase in ventilation/respiratory rate
Increased blood flow to the heart and muscle
Increase in release of glucose from the liver - CORRECT ANSWERS increased digestive
activity to supply glucose for energy
Which part of the action potential occurs when the Na+ channels are inactivating and K+
channels open?
Repolarization
Depolarization
Resting state
, Hyperpolarization - CORRECT ANSWERS repolarization
Which of the following statements is correct concerning efferent pathways of the ANS?
Sympathetic preganglionic fibers are shorter, while postganglionic fibers are longer than those of
the parasympathetic system
Both preganglionic and postganglionic fibers are shorter in the sympathetic system
Both preganglionic and postganglionic fibers are longer in the sympathetic system
Sympathetic preganglionic fibers are longer, while postganglionic fibers are shorter than those of
the parasympathetic system - CORRECT ANSWERS sympathetic preganglion fibers are
shorter, while postganglionic fibers are longer than those of the parasympathetic system
The myelin sheath is formed in the PNS by ____________
Oligodendrocytes
Microglial cells
Astrocytes
Schwann cells - CORRECT ANSWERS schwann cells
Sympathetic responses generally are widespread because _____________.
Preganglionic fibers are short
Preganglionic fibers are long
Inactivation of ACh is fairly slow
NE and epinephrine are secreted into the blood as part of the sympathetic response - CORRECT
ANSWERS NE and epinephrine are secreted into the blood as part of the sympathetic
response
Cranial nerve II, the optic nerve sends nerve impulses to the brain carrying information about the
things we see. These nerve fibers most likely belong to which of the nervous system?
Sensory (afferent) division
Somatic nervous system
Parasympathetic division
QUESTION AND ANSWERS
The interior surface of a neuron's plasma membrane at resting membrane potential will have a
___________.
Positive charge and contains more sodium than outside of the cell
Negative charge and contains more sodium than outside of the cell
Negative charge and contains less sodium than outside of the cell
Positive charge and contains less sodium than outside of the cell - CORRECT
ANSWERS negative charge and contains less sodium than outside of the cell
Which of the following organs does not exhibit parasympathetic tone/domination
Heart
Urinary tract organ
Blood vessels
Digestive smooth muscle - CORRECT ANSWERS blood vessels
Which of the following would not take place during exercise or vigorous physical activity?
Increase digestive activity to supply glucose for energy
Increase in ventilation/respiratory rate
Increased blood flow to the heart and muscle
Increase in release of glucose from the liver - CORRECT ANSWERS increased digestive
activity to supply glucose for energy
Which part of the action potential occurs when the Na+ channels are inactivating and K+
channels open?
Repolarization
Depolarization
Resting state
, Hyperpolarization - CORRECT ANSWERS repolarization
Which of the following statements is correct concerning efferent pathways of the ANS?
Sympathetic preganglionic fibers are shorter, while postganglionic fibers are longer than those of
the parasympathetic system
Both preganglionic and postganglionic fibers are shorter in the sympathetic system
Both preganglionic and postganglionic fibers are longer in the sympathetic system
Sympathetic preganglionic fibers are longer, while postganglionic fibers are shorter than those of
the parasympathetic system - CORRECT ANSWERS sympathetic preganglion fibers are
shorter, while postganglionic fibers are longer than those of the parasympathetic system
The myelin sheath is formed in the PNS by ____________
Oligodendrocytes
Microglial cells
Astrocytes
Schwann cells - CORRECT ANSWERS schwann cells
Sympathetic responses generally are widespread because _____________.
Preganglionic fibers are short
Preganglionic fibers are long
Inactivation of ACh is fairly slow
NE and epinephrine are secreted into the blood as part of the sympathetic response - CORRECT
ANSWERS NE and epinephrine are secreted into the blood as part of the sympathetic
response
Cranial nerve II, the optic nerve sends nerve impulses to the brain carrying information about the
things we see. These nerve fibers most likely belong to which of the nervous system?
Sensory (afferent) division
Somatic nervous system
Parasympathetic division
