lab exam 4
Pacinian corpuscles naked nerve endings Merkel discs Ruffini's corpuscles Meissner's corpuscles Golgi tendon organs
1. high frequency vibration receptors 2. pain and temperature receptors 3. hair follicle receptors 4. deep pressure and stretch receptors 5. tactile receptors 6. stretch receptors
monosynaptic somatic superficial cord autonomic spinal polysynaptic
1. involve a sensory and motor neuron only 2. activate skeletal muscle 3. require intact upper motor pathways and spinal cord 4. activate smooth and cardiac muscle and glands 5. work well in decrebrate individuals 6. involve a sensory, motor and one or more interneuro
List the essential components of a reflex arc.
1. receptor 2. sensory neuron 3. integration center 4. motor neuron 5. effector
List the three types of sensory receptors.
exteroceptors, interoceptors, proprioceptors
CSF is produced in the arachnoid villi and removed from the system by the choroid plexus
false
Denticulate ligaments are the saw-toothed extensions of the dura mater that secure the spinal cord to the bony wall of the vertebral column all along its length
false
Humans have three dural falx, but sheep only have two, because they are missing the falx cerebri
false
In the ciliospinal reflex, both pupils constrict because of sympathetic impulses that are closely integrated
false
Like Broca's area, Wernicke's area is typically located in both cerebral hemispheres.
false
Meissner's corpuscles are located in the reticular layer of the dermis and respond to deep pressure
false
Sensory receptors act as transducers, changing environmental stimuli into efferent impulses, which are identified entirely by the area of the motor cortex that is stimulated
false
The largest nerve of the lumbar plexus is the ___________ nerve which innervates the anterior thigh muscles
femoral
Activation of the ___________ branch of the autonomic system inhibits digestive and reproductive functions
sympathetic
Activation of the sympathetic branch of the autonomic system inhibits digestive and reproductive functions
true
As a rule, the areas of the body that have the highest density of tactile receptors (like the lips) have the most sensitivity to touch.
true
In the cerebrum, the gray matter is on the exterior with white on the interior, but in the spinal cord, the white matter is on the exterior and the gray is on the interior.
true
Tactile localization and two-point thresholds are dependent on the density of touch receptors in the integument, and vary from one part of the body to another.
true
The diencephalon consists of the epithalamus, the thalamus and the hypothalamus
true
The largest nerve of the lumbar plexus is the femoral nerve which innervates the anterior thigh muscles
true
The parasympathetic, or craniosacral division of the autonomic system innervates structures of the head and neck, along with organs in the pelvic cavity
true
The patellar reflex is an example of a monosynaptic reflex.
true
The patellar, or knee-jerk reflex is an example of a stretch reflex, which normally acts to maintain posture, balance and locomotion
true
The thirty one pairs of spinal nerves arise from the fusion of the dorsal and ventral roots of the spinal cord
true
To test the Facial nerve (VII), the subject is asked to taste sweet, salty and sour foods, smile, close the eyes, and whistle.
true