BIO 253 QUESTIONS WITH COMPLETE SOLUTIONS.
Which division of the nervous system controls skeletal muscles? - ANSWER-Somatic
What cell produce the myelin sheath in the peripheral nervous system? - ANSWER-
Schwann Cells
Which of the following cells are responsible for the blood-brain barrier? - ANSWER-
Astrocytes
Synaptic knobs, or axon terminals, release ________ to communicate with other
neurons and effectors. - ANSWER-Neurotransmitters
Which structural type of neuron is the most common? - ANSWER-Multipolar
Cell bodies and dendrites make up most of which type of Central Nervous Matter? -
ANSWER-Gray Matter
Which of these is a major function of the peripheral nervous system? - ANSWER-
Communicating between the Central Nervous System and the rest of the body
What is the function of descending tracts in the spinal cord? - ANSWER-To carry motor
impulses to the spinal nerves
Which of the following are examples of neuroglia? Select all that apply - ANSWER-
Microglia, Ependymal Cells, Oligodendrocytes
Motor fibers leave the spinal cord through which structures? - ANSWER-Anterior or
Ventral roots
Where is the cerebrospinal fluid located? - ANSWER-Subarachnoid Space
For a neuron at resting potential, what is the expected distribution of electrolytes? -
ANSWER-A high sodium outside the cell fluid and high potassium inside the cell
What is the membrane potential at which an action potential starts? - ANSWER-
Threshold
What is the first part of a reflex arc? - ANSWER-Receptor
"Saltatory" conduction occurs in what structures? - ANSWER-Myelinated axons
Which of these happens during the depolarization of the plasma membrane? -
ANSWER-Na+ diffuses into the cell
Which division of the nervous system controls skeletal muscles? - ANSWER-Somatic
What cell produce the myelin sheath in the peripheral nervous system? - ANSWER-
Schwann Cells
Which of the following cells are responsible for the blood-brain barrier? - ANSWER-
Astrocytes
Synaptic knobs, or axon terminals, release ________ to communicate with other
neurons and effectors. - ANSWER-Neurotransmitters
Which structural type of neuron is the most common? - ANSWER-Multipolar
Cell bodies and dendrites make up most of which type of Central Nervous Matter? -
ANSWER-Gray Matter
Which of these is a major function of the peripheral nervous system? - ANSWER-
Communicating between the Central Nervous System and the rest of the body
What is the function of descending tracts in the spinal cord? - ANSWER-To carry motor
impulses to the spinal nerves
Which of the following are examples of neuroglia? Select all that apply - ANSWER-
Microglia, Ependymal Cells, Oligodendrocytes
Motor fibers leave the spinal cord through which structures? - ANSWER-Anterior or
Ventral roots
Where is the cerebrospinal fluid located? - ANSWER-Subarachnoid Space
For a neuron at resting potential, what is the expected distribution of electrolytes? -
ANSWER-A high sodium outside the cell fluid and high potassium inside the cell
What is the membrane potential at which an action potential starts? - ANSWER-
Threshold
What is the first part of a reflex arc? - ANSWER-Receptor
"Saltatory" conduction occurs in what structures? - ANSWER-Myelinated axons
Which of these happens during the depolarization of the plasma membrane? -
ANSWER-Na+ diffuses into the cell
