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Which of the following is NOT true about the myelin sheath?
It decreases the speed of nerve impulse conduction.
A nerve impulse is
a change in the distribution of positive and negative ions on the outer and inner surfaces of the neuron membrance that opens adjacent channels and propagates its flow.
The primary functions of the spinal cord involve
relfex actions and communication between the brain and spinals nerves.
Which part of the brain contains highest control centers for the heartbeat, respiration, temp, and thirst?
True or False: Individuals can remain "alive" for long periods of time without cerebral function.
The two major types of sensory receptors, bases on the origin of stimuli, are
exteroceptors and interoceptors
When a stimulis is continuous but sensory receptors no longer respond to it, the process is called
Which is NOT a correct association of sensory receptors?
Thermoreceptors- pressure waves sensed as "hearing"
On the retina there is an oval, yellowish area with a depression in which vision for color is most acute. This are is called the
The structure that regulates the size of the opening for light in the eye and is similar to a camera diaphram, is the
If the cornea is uneven, light rays are not focused evenly on the retina and a fuzzy image is formed. This condition is called
Which correctly traces the path of a sound vibration unitl the signal is sent to the brian?
auditory canal>tympanic membrane>malleus>incus>stapes>oval window>spiral organ>cochlear nerve
From your understanding of the anatomy of the ear, what is the most likely explanation for a dogs ability to hear higher frequencies(pitch)?
A wider range to the tectorial membrane and hair cells.
The sense of equilibrium is accomplished by hair cells associated with the
ampulla and semicircular canals
Which is NOT a correct association of bone structures and functions?
canaliculi-large central cavity in the center of the bone shaft
The type of bone tissue that has lacunae, concentric circles around osteons, and is found in the mid portion of a long bone is
In young people who are still developing, a band of cartilage called a ____ remains between the primary ossification cener and each secondary ossicfication center.
What is the correct order that a motor nerve stimulation encounters structures in triggering a contraction?
motor nerve>synaptic cleft>sarcolemma>sarcoplasmic reticulum>troponin
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