Chamberlain College of Nursing - BIOS 252 Final Exam – Latest 2019 Questions and Answers.{already Graded a Clean A}.
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Chamberlain College of Nursing - BIOS 252 Final Exam – Latest 2019 Questions and Answers.{already Graded a Clean A}.
Chamberlain College of Nursing - BIOS 252 Final Exam – Latest 2019 Questions and Answers.{already Graded a Clean A}.
Chamberlain College of Nursing - BIOS 252 Final Exam – La...
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Chamberlain College of Nursing - BIOS 252 Final Exam –
Latest 2019 Questions and Answers.{already Graded a
Clean A}
1. Define spinal reflex and use an example from the body to illustrate a spinal reflex.
(Page 446)
Spinal Reflex – when integration takes place in the spinal cord gray matter
If you pick up something hot, the grasping muscles may relax and you may drop the hot
object even before you are consciously aware of the extreme heat or pain. This is an
example of a spinal cord reflex—a quick, automatic response to certain kinds of stimuli
that involves neurons only in the spinal nerves and spinal cord.
2. Describe sleep and its major stages and then contrast sleep to coma - how are they
similar and how do they differ.(Page 570)
Sleep is a state of altered consciousness or partial unconsciousness from which a
person can be aroused
Coma is a state of unconsciousness in which a person has little or no response to
stimuli
Alpha waves- stage 1 (drowsy)
Sleep Spindles – Stage 2 light sleep
Theta and delta waves – stags 3-4 deep sleep
Beta waves- fully awake eyes open
Brain Waves:
Alpha waves – awake and resting
Beta Waves – mental and sensory activity
Theta Waves – emotional distress
Delta Waves – Deep sleep in adults
2. Explain language usage and comprehension including a description of the two major
language areas of the brain, where they are located and what they are specialized to
accomplish, including what happens when damage occurs to either area.
Broca’s Area:
Located in the frontal lobe left hemisphere, deals with speaking and understanding
language that involve sensory association and motor areas at the cortex
Wernicke’s Area:
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Located in the left temporal & parietal lobes left hemisphere, interprets the meaning
of speech by recognizing spoken words, translates words into thoughts
Damage to Broca’s:
Cerebrovascular accident (CVA) means understand words but cannot speak your
thoughts
Damage to Wernicke’s:
Can speak but cannot arrange words in a coherent fashion
3. Compare and contrast the cochlea and the vestibular apparatus, discussing their
anatomical and physiological differences.
The inner ear is divided into 2 categories: the cochlea and vestibular apparatus.
Cochlea – snail shape boney spinal canal makes 3 turns around a boney cord and
divided into 3 channels
Vestibular apparatus – is the oval central portion of the boney labyrinth the
membranous labyrinth in the vestibule consists of two sacs the utricle and saccule
which are connected by a small duct coming from the vestibule are 3 boney
semicircular canals
4. Explain the process of light reflecting off an object will pass through the eye. Include
all relevant structures and indicate how the photon is transduced into an
electrochemical signal in the brain. Include the major regions involved in visual
transduction.
Light rays reflecting distant objects are focused on the retina after they passed
through the cornea, aqueous humor, the lens, and vitreous humor. As light passes
through the eye they experience refraction, which is the change in direction of light
rays as they transition between different materials. Once the light rays are focused
on the retina, the formed image is processed by photoreceptor cells called rods and
cones. These photoreceptors relay the signal to the brain by the optic nerve.
6. Explain the control of estrogen and progesterone through the endocrine system.
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