Lab Exam 4
Layer of connective tissue that surrounds an individual muscle fiber.
Layer of connective tissue that surrounds a skeletal muscle.
Connective tissue located between adjacent muscles.
Protein found within thick filament.
A small bundle of muscle fibers.
Layer of connective tissue that separates a muscle into small bundles called fascicles.
Cell membrane of a muscle fiber.
Unit of alternating light and dark striations between Z lines.
Cytoplasm of a muscle fiber.
Cellular organelle in muscle fiber corresponding to the endoplasmic reticulum.
Cordlike part that attaches a muscle to a bone.
Transverse (T) tubule
Membranous channel extending inward from muscle fiber membrane.
Star-shaped neuroglia between neurons and blood vessels.
Nerve fiber arising from a slight elevation of the cell body that conducts an impulse away from the cell body.
Chromatophilic substance (Nissl bodies)
Corresponds to rough endoplasmic reticulum in other cells.
Branch of an axon.
Neuron process with many branches that conducts an impulse toward the cell body.
Substance of Schwann cell composed of lipoprotein that insulates axons and increases impulse speed.
Sheath of Schwann cell containing cytoplasm and nucleus that encloses myelin.
Netowrk of fine threads extending into nerve fiber.
Structure capable of responding to motor impulse.
Cells that cover the inside spaces of the brain ventricles and help regulate cerebrospinal fluid.
Specialized mass of neuron cell bodies outside the brain or spinal cord.
Transmits impulse from sensory to motor neuron withing central nervous system.
Motor (efferent) neuron
Transmits impulse out of the brain or spinal cord to effectors (muscles and glands).
Myelin-forming neuroglia in brain & spinal cord.
Sensory (afferent) neuron
Transmits impulse into brain or spinal cord from receptors.
Number of spinal nerves in the spinal cord.
The bulge in the spinal cord that gives off nerves to the upper limbs.
The bulge in the spinal cord that gives off nerves to the lower limbs.
Posterior median sulcus
A groove that extends the length of the spinal cord posteriorly.
Resemble the upper wings of a butterfly (in a spinal cord cross section).
Where the cell bodies of motor neurons are found in the spinal cord.
Connects the gray matter on the left and right sides of the spinal cord.
Found in the gray commissure of the spinal cord & contains cerebrospinal fluid & is continuous with the ventricles of the brain.
Anterior, lateral, & posterior funiculi
The divisions of the spinal cord's white matter.
The longitudinal bundles of nerve fibers within the spinal cord comprise these major nerve pathways.
Separates frontal & parietal lobes.
Thin layer of gray matter on surface of cerebrum.
Connects cerebral hemispheres.
A layer of dura mater that separates cerebellar hemispheres.
Ridge on surface of cerebrum.
Part of diencephalon that forms lower walls and floor of third ventricle.
Cerebral lobe located deep within lateral sulcus.
Part of brainstem continuous with the spinal cord.
Part of brainstem between diencephalon and pons.
Structure formed by the crossing-over of the optic nerves.
Cone-shaped structure attached to upper posterior portion of diencephalon.
Rounded bulge on underside of brainstem.
Connects middle ear & pharynx.
External acoustic meatus
S-shaped tube leading to tympanic membrane.
Auditory ossicle attached to tympanic membrane.
Osseous (bony) labyrinth
Bony canal of inner ear in temporal bone.
Extends from apex of cochlea to round window.
Leads from oval window to apex of cochlea.
Auditory ossicle attached to oval window.
Contacts hairs of hearing receptors.
Air-filled space containing auditory ossicles.
Tympanic membrane (eardrum)
Cone-shaped, semitransparent membrane attached to malleus.
Utricle & saccule
2 expanded chambers where the organs of static equilibrium are located.
The bone where all the balance organs are located in the skull.
The structure in the wall of the membranous labyrinth where the receptor cells of the balance organs are found.
Otoliths are small grains composed of this.
The nerve where sensory impulses travel from the organs of equilibrium to the brain.
The swelling canal the sensory organ of a semicircular canal lies within
The sensory organ within the ampulla of a semicircular canal.
This part of the sensory organ that consists of a dome-shaped gelatinous mass.
Inertia of the fluid
Why when the head is moved, the fluid inside the membranous portion of a semicircular canal tends to remain stationary.
This part of the brain interprets impulses from the equilibrium receptors.
Fills anterior & posterior chambers of the anterior cavity of the eye.
Posterior five-sixths of middle (vascular) tunic.
Cause lens to change shape.
Inner lining of eyelid.
Transparent anterior portion of outer tunic.
Smooth muscle that controls light entering the eye.
Area where optic nerve exits the eye.
Contains visual receptors called rods & cones.
White part of outer (fibrous) tunic.
Connects lens to ciliary body.
Fills posterior cavity of eye.