A&P Exam 5
Generally, nervous tissue is made up of ______ distinct cell types.
2
The diameter of a typical adult spinal cord is about ______.
3/4 inch
Where are the photoreceptors located?
In the neural layer of the retina
______ are excitable cells that initiate and transmit electrical signals.
Neurons
Lateral horns are found in the ______ parts of the spinal cord only.
T1 - L2
term meaning inflowing
afferent
The tympanic cavity is filled with ______.
air
The ______ horns primarily house the cell bodies of somatic motor neurons.
anterior
What chamber is between the iris and cornea?
anterior chamber
A nerve plexus is a network of interweaving ______ of spinal nerves.
anterior rami
What type of fluid is found in the anterior cavity?
aqueous humor
The cartilaginous portion of the external ear is called the ______.
auricle
The lateral horns contain the cell bodies of ______ neurons.
autonomic motor
The main activity of ______ is nerve impulse conduction.
axons
components of the CNS
brain and spinal cord
The preganglionic neurons of the parasympathetic division are located in the ______.
brainstem and sacral divisions of the spinal cord
Ependymal cells help produce ______.
cerebrospinal fluid
The telencephalon forms the ______.
cerebrum
What type of photoreceptors detect color?
cones
Double layers of dura mater that extend into the cranial cavity are called ______.
cranial dural septa
The location of preganglionic neurons in the parasympathetic division of the autonomic nervous system allow it to be also known as the ________ division
craniosacral
The epineurium is made of ______ connective tissue. Covers entire nerve.
dense irregular
The thalamus, hypothalamus and epithalamus are formed from the ______.
diencephalon
The meningeal layer is usually fused to the periosteal layer, except in specific areas where the two layers separate to form large, blood-filled spaces called ______.
dural venous sinuses
___________ glands are ductless organs that secrete their products directly into the bloodstream.
endocrine
An individual axon is wrapped in a connective tissue covering called the ______.
endoneurium (areolar connective tissue)
What is the name of the outermost layer of the eye?
fibrous
Each shallow depression between the folds of the cerebrum is called a ______.
five
The spinal cord extends inferiorly from the brain through the ______ and then through the vertebral canal and ends at the level of the ____ vertebra.
foramen magnum, L1
Of the five cerebral lobes, ______ are visible superficially.
four
There are ______ ventricles in the brain; ______ of them are lateral ventricles.
four, two
Neurons are classified ______ depending on the direction the nerve impulse travels.
functionally
The outer surface of the cerebrum has a number of folds, each one is called a
gyrus
Endocrine organs are located in ______.
highly vascularized areas
he vitreous body is also called the vitreous ______.
humor
Which neurons are only located in the CNS?
interneurons
two primary functions of the nervous system
interpretation, control
What structure is the dividing line between the anterior and posterior chambers?
iris
The suspensory ligaments connect the ______ to the ciliary muscles.
lens
What structure focuses incoming light onto the retina?
lens
The ______ forms the pons and cerebellum.
metencephalon
The autonomic division of the nervous system is part of the ________ nervous system
motor
Which type of neuron is most common?
multipolar
The nervous system is primarily made of
nervous tissue
Ventricles of the brain are cavities that are derived from the lumen of the embryonic ______.
neural tube
The nervous system uses nerve impulses and chemicals called ______ to transmit information.
neurotransmitters
A fascicle is surrounded by a layer of dense irregular connective tissue called ______.
perineurium
Neurolemmocytes create the myelin sheath in the ______ nervous system.
peripheral
What is the space behind the lens called?
posterior cavity
Which spinal nerve rami do not form plexuses?
posterior rami
Aqueous humor is secreted into the ______ chamber before traveling to the ______ chamber of the eye
posterior, anterior
The posterior rami of spinal nerves tend to follow a ________ pattern as they innervate the deep muscles and skin of the neck and back.
segmental
The cell bodies of ______ neurons are found in the posterior horns of the spinal cord.
sensory
The axons of ______ neurons and the cell bodies of ______ are located in the posterior horns.
sensory, interneurons
A reflex arc is the neural wiring of a ______ reflex.
single
What type of muscle is found in the iris?
smooth
Each shallow depression between the folds of the cerebrum is called a ______.
sulcus
Which division of the autonomic nervous system is also known as the thoracolumbar division?
sympathetic
Endocrine glands secrete their products directly into _______.
the blood
The duration of response to endocrine stimulation may last from minutes to days or even weeks, while nervous system responses are much shorter in duration.
true
What is another name for the ear drum?
tympanic membrane
The cavities within the brain are called
ventricles
Which two are divisions of the sensory nervous system?
visceral division and somatic division
Which division of the nervous system transmits nerve impulses from blood vessels and viscera to the central nervous system? Multiple choice question.
visceral sensory division
In the eye, the ______ humor is gelatinous.
vitreous
The somatic nervous system (SNS) is another name for the ______ division of the nervous system.
voluntary
The ______ matter lies deep to the ______ matter of the cortex of the brain.
white, gray