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13,14,15
| Question | Answer |
|---|---|
| Which of the following structures is NOT a part of the peripheral nervous system (PNS)? | Brain |
| Mechanoreceptors | stretch |
| THERMORECEPTORS | temp |
| photoreceptors | light energy |
| chemo receptors | chemical in solution |
| nociceptors | pain |
| Proprioceptors advice the brain of... | body movements |
| Simple receptors found in epithelia and connective tissue tend to __________ | have encapsulated or nonencapsulated dendritic endings |
| Which of the following has nonencapsulated nerve endings? | hair follicle receptors |
| The final level of neural integration in the somatosensory system is the __________ level. | perceptual |
| Fast adapting receptors are called __________. | phasic receptors |
| Most nerves are able to carry impulses both toward and away from the CNS. | True |
| CNS nerve fibers are able to regenerate. | False |
| A nerve that carries autonomic signals away from the CNS is classified as __________. | visceral efferent |
| The cranial nerves are limited to the head and neck region. | False |
| The first two pairs of cranial nerves attach to the __________. | forebrain |
| all spinal nerves are mixed nerves t/f | true |
| If the phrenic nerve were severed, what would be the most immediate effect? | Breathing would stop |
| The pinching motion (with opposed thumb and forefinger) is highly dependent upon impulses transmitted by the __________. | Median Nerve |
| The sciatic nerve is a single nerve. T/F | False |
| The first level of motor control is the __________. | segmental level |
| Which structure is involved in the projection level of motor control? | Primary Motor Cortex |
| In a reflex arc, the __________ transmits afferent impulses to the CNS. | Sensory Neuron |
| The flexor reflex is initiated by painful stimuli. t/f | true |
| What is the function of the somatic nervous system? | to stimulate skeletal muscles |
| Which of the following is (1) released by all somatic motor neurons at their synapses, and (2) always excites muscle contraction? | acetylcholine |
| For which of the following activities is the sympathetic nervous system generally responsible? | fight-or-flight responses |
| The parasympathetic nervous system is often referred to as the "resting and digesting" system. t/f | True |
| The glossopharyngeal nerves are responsible for which of the following functions? | activating the parotid salivary glands |
| As the vagus nerves pass into the thorax, they send branches to the cardiac plexuses to increase heart rate. | FALSE |
| The sympathetic division is anatomically more complex than the parasympathetic division. | TRUE |
| The preganglionic and postganglionic axons can synapse in the sacral region. | FALSE |
| __________ and __________ are the major neurotransmitters released by autonomic nervous system neurons. | acetylcholine; norepinephrine |
| Norepinephrine and epinephrine can have either excitatory or inhibitory effects on target organs. | TRUE |
| Why do doctors sometimes prescribe drugs called "sympatholytic agents" to treat hypertension? | They interfere with (block) the activity of vasomotor fibers that control blood vessel tone. |
| Although sympathetic nerve impulses act only briefly, they provoke hormonal effects that last much longer. | TRUE |
| The __________ may subconsciously modify the workings of the autonomic nervous system | cerebral cortex |
| Autonomic neuropathy is a common complication of diabetes mellitus. | TRUE |
| Blood "shunting" helps maintain circulation to vital organs during circulatory shock. | TRUE |
| The cornea lacks ….. | BLOOD VESSELS |
| he __________ is NOT a part of the vascular layer of the eye. | SCLERA |
| The __________ dilate the pupils of the eyes. | radial muscles |
| Dim light and peripheral vision receptors are called __________. | RODS |
| Aqueous humor supplies nutrients and oxygen to the lens and cornea | TRUE |
| Choose the answer that shows the correct order of light transmission from the air to the retina. | air, cornea, aqueous humor, lens, vitreous humor, retina |
| Adjustment to low light conditions is primarily facilitated by changes in __________ concentration | rhodopsin |
| Olfactory receptor cells are neurons that undergo noticeable turnover throughout adult life. | TRUE |
| Where is the olfactory epithelium located? | in the roof of the nasal cavity |
| BItter taste: | alkaloids such as quinine, nicotine, and caffeine. |
| part of the external ear? | The external ear consists of the auricle (pinna) and the external acoustic meatus (auditory canal). |
| Place the following events in the order in which they occur during sound transmission: 1.Tympanic membrane vibrates 2Internal ear fluids are set in motion 3Hearing receptors are stimulated 4Ossicles of the ear vibrate 5Auditory cortex is stimulated | 1,4,2,3,5 |
| frequency | number of waves that pass a given point in a given time |
| wavelength | the distance between two consecutive wave crests |
| tone | a single sound wave frequency |
| amplitude | the height of a wave crest |
| quality | a mixture of sound wave frequencies |
| Static equilibrium receptors monitor the position of the head. | TRUE |
| Information from the balance receptors goes directly to the cerebral cortex. | FALSE |
| As we age, __________. | the ability to detect high-pitched sounds diminishes |
Created by:
bastemen