Biol 2401 Lecture test 5 Questions All
Answered Correct 2025-2026 Updated.
The ________ is the layer of the meninges that is in direct contact with the surface of the brain.
- Answer Pia mater
Interneurons - Answer are found only in the central nervous system.
Which of the following are responsible for reciprocal inhibition? - Answer interneurons in the
spinal cord
A stimulus that opens gated potassium ion channels, taking the membrane potential away from
0 mV, results in which of the following? - Answer hyperpolarization
Which of the following is the most sensitive body region? - Answer Face
The corticospinal tracts function in the control of - Answer skeletal muscles
The neurilemma of axons in the peripheral nervous system is the outer layer of - Answer
Schwann cells
The brain and spinal cord comprise the - Answer central nervous system
The cranial nerves whose primary function is special sensory are - Answer I, II, and VIII.
The cranial nerve that has three branches is the - Answer Trigeminal
Which of the following is a function of the efferent division of the nervous system? - Answer
sending signals to muscles
In general, the nervous system - Answer is fast acting.
, Spinal nerves from the brachial plexus innervate the - Answer shoulder girdle and upper limb
Which of the following contains a delicate network of collagen and elastin fibers through which
cerebrospinal fluid circulates? - Answer subarachnoid space
Which cranial nerve is responsible for the sensory innervation of the anterior two-thirds of the
tongue? - Answer VII
The ________ division of the nervous system brings sensory information to the central nervous
system. - Answer afferent
The resting potential of a neuron is ________. - Answer -70 mV
There are ________ pairs of spinal nerves. - Answer 31
Voluntary control of skeletal muscles is provided by the - Answer corticospinal pathway
Identify the correct sequence of steps in the generation of an action potential.1. Activation of
sodium channels and rapid depolarization2. Inactivation of sodium channels and activation of
potassium channels3. Depolarization to threshold4. Closing of potassium channels - Answer
3,1,2,4
In adults, the spinal cord usually extends to which level? - Answer first or second lumbar
vertebra
Head injuries that damage cerebral blood vessels are serious conditions because - Answer
these spaces compress and distort the relatively soft tissues of the brain
Small phagocytic glial cells, which are derived from white blood cells, are called - Answer
microglia
When a neuron is at rest, which ion passes through its membrane most easily? - Answer
potassium
Answered Correct 2025-2026 Updated.
The ________ is the layer of the meninges that is in direct contact with the surface of the brain.
- Answer Pia mater
Interneurons - Answer are found only in the central nervous system.
Which of the following are responsible for reciprocal inhibition? - Answer interneurons in the
spinal cord
A stimulus that opens gated potassium ion channels, taking the membrane potential away from
0 mV, results in which of the following? - Answer hyperpolarization
Which of the following is the most sensitive body region? - Answer Face
The corticospinal tracts function in the control of - Answer skeletal muscles
The neurilemma of axons in the peripheral nervous system is the outer layer of - Answer
Schwann cells
The brain and spinal cord comprise the - Answer central nervous system
The cranial nerves whose primary function is special sensory are - Answer I, II, and VIII.
The cranial nerve that has three branches is the - Answer Trigeminal
Which of the following is a function of the efferent division of the nervous system? - Answer
sending signals to muscles
In general, the nervous system - Answer is fast acting.
, Spinal nerves from the brachial plexus innervate the - Answer shoulder girdle and upper limb
Which of the following contains a delicate network of collagen and elastin fibers through which
cerebrospinal fluid circulates? - Answer subarachnoid space
Which cranial nerve is responsible for the sensory innervation of the anterior two-thirds of the
tongue? - Answer VII
The ________ division of the nervous system brings sensory information to the central nervous
system. - Answer afferent
The resting potential of a neuron is ________. - Answer -70 mV
There are ________ pairs of spinal nerves. - Answer 31
Voluntary control of skeletal muscles is provided by the - Answer corticospinal pathway
Identify the correct sequence of steps in the generation of an action potential.1. Activation of
sodium channels and rapid depolarization2. Inactivation of sodium channels and activation of
potassium channels3. Depolarization to threshold4. Closing of potassium channels - Answer
3,1,2,4
In adults, the spinal cord usually extends to which level? - Answer first or second lumbar
vertebra
Head injuries that damage cerebral blood vessels are serious conditions because - Answer
these spaces compress and distort the relatively soft tissues of the brain
Small phagocytic glial cells, which are derived from white blood cells, are called - Answer
microglia
When a neuron is at rest, which ion passes through its membrane most easily? - Answer
potassium
