chapter 8 test- the nervous system

which of the following neurotransmitters usually depolarizes post synaptic neurons

acetylcholine

the part of the peripheral nervous system that brings information to the central nervous system is the

afferent division

the ________ acts as a switching and relay center for integration of conscious and unconscious sensory information and motor commands

diencephalon

the area anterior to the central sulcus is the

frontal lobe

if the dorsal root of a spinal nerve is severed,

incoming sensory information would be disrupted

another name for the patellar reflex is the

knee-jerk reflex

the visual cortex is located in the

occipital lobe

the visual cortex of the cerebrum is located in the

occipital lobe

all of the nervous tissue outside of the central nervous system comprise the _________ nervous system

peripheral

which structure secretes melatonin

pineal gland

when a neuron is at rest, which ion passes through its membrane most easily

potassium

the primary motor cortex of the cerebrum is located in the

precentral gyrus

the surface of the postcentral gyrus contains the

primary motor cortex

which of the following lists the parts of a reflex arc in correct order

receptor, sensory neuron, interneuron, motor neuron, effector

the neurilemma of axons in the peripheral nervous system is the outer layer of

schwann cells

the cortex inferior to the lateral sulcus is the

temporal lobe

the brain and spinal cord comprise the

central nervous system

the thalamus is the largest portion of which major brain region

diecephalon

the _________ is the layer of the meninges that is in direct contact with the surface of the brain

pia mater

which of the following is a function of the efferent division of the nervous system

sending signals to muscles

the _________nervous system provides involuntary regulation of smooth muscle, cardiac muscle, and glandular activity

autonomic

which ion is needed to trigger the release of acetylcholine, via exocytosis, into the synaptic cleft

calcium

the grey matter of the spinal cord is dominated by

cell bodies of neurons and glial cells

the region of the brain that is involved in conscious thought and intellectual function as well as processing somatic sensory and motor information is the

cerebrum

the primary connection between cerebral hemispheres is the

corpus callosum

the branching structures that, together with the cell body, are sensitive to chemical, mechanical, or electrical stimulation are called

dendrites

opening of voltage-gated sodium channels in the membrane of a neuron results in

depolarization

the two cerebral hemispheres are separated by the

longitudinal fissure

if broca's area is damaged, what might result

loss of the ability to speak

major centers concerned with autonomic function, such as heart rate, blood pressure, and respiration is the

medulla oblongata

which structure contains cardiovascular and respiratory rhythmicity centers

medulla oblongata

neurons that have two or more dendrites and a single axon extending away from the soma are called

multipolar

most neurons lack centrioles. this observation explains

why such neurons divide through mitosis

the resting potential of a neuron is _______

-70mV