Exam (elaborations)
Ch 11 - Pt III (1).
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- Millwright. Bearings
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- Millwright. Bearings
Exam of 17 pages for the course Millwright. Bearings at Millwright. Bearings (Ch 11 - Pt III (1).)
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Ch 11 - Pt IIIReceptors are classified based on their sensitivity to different types of stimuli. The
five main types of receptors are _____, pain receptors, _________,
mechanoreceptors, and photoreceptors. - CORRECT ANSWER-chemoreceptors;
thermoreceptors
What is the function of sensory fibers? - CORRECT ANSWER-carry nerve impulses
from the body into the CNS
The classification of sensory receptors as photoreceptors, thermoreceptors, etc., is
based on what characteristic of the receptors? - CORRECT ANSWER-Stimulus type
that causes a response
What type of stimulus does a chemoreceptor respond to? - CORRECT
ANSWER-changes in the concentrations of specific molecules
Which type of stimulus would be detected by a mechanoreceptor? - CORRECT
ANSWER-a distortion of the receptor's plasma membrane
Which of the following receptors does not trigger a sensation? - CORRECT
ANSWER-receptors that measure oxygen levels in the blood
Match each term that relates to sensation and perception with the correct definition. -
CORRECT ANSWER-sensation - Awareness of a sensory event due to the
response of a receptor to a stimulus.
perception - Interpretation of sensory signals.
projection - The process by which we can pinpoint the location of a stimulated
receptor.
Light energy is detected by specialized receptors called _______. - CORRECT
ANSWER-photoreceptors
What is sensory adaptation? - CORRECT ANSWER-The ability of the brain to
become less responsive to some stimuli.
Indicate three of the exteroceptive senses. - CORRECT ANSWER-pain
temperature
touch/pressure
Match each example of a stimulus with the class of general sense responsible for
detecting it. - CORRECT ANSWER-Interoceptive senses - Distension of the urinary
bladder, indicating a need to urinate.
,Proprioceptive senses - Change in body position when moving from laying down to
sitting upright.
Exteroreceptive senses - Housefly landing on the skin of the neck.
General senses associated with the body surfaces are called _______ senses and
include touch, pressure, temperature, and pain. - CORRECT
ANSWER-exteroreceptive
What type of touch/pressure receptor is involved in the sensation of itching? -
CORRECT ANSWER-free nerve endings
Choose two types of receptors that sense touch and pressure. - CORRECT
ANSWER-lamellated (Pacinian) corpuscles
free nerve endings
Which statement accurately describes the structure of a tactile (Meissner's)
corpuscle? - CORRECT ANSWER-Two or more sensory fibers that end as tiny
knobs branch within an oval mass of flattened connective tissue cells
The simplest receptors for touch/pressure are ____ nerve endings. - CORRECT
ANSWER-free
Indicate three of the exteroceptive senses. - CORRECT ANSWER-temperature
touch/pressure
pain
What sensation is provided by free nerve endings in the skin? - CORRECT
ANSWER-itching
Match touch and pressure receptors to their locations. - CORRECT ANSWER-Free
nerve endings - Ends of dendrites branch and extend between epithelial cells.
Miessner's corpuscles - Abundant in hairless areas of skin, such as the lips.
Pacinian corpuscles - Abundant in deeper dermal tissues and connective tissue
capsules of joints.
General senses associated with the body surfaces are called ______ senses and
include touch, pressure, temperature, and pain. - CORRECT
ANSWER-exteroreceptive
What type of touch/pressure receptor is involved in the sensation of itching? -
CORRECT ANSWER-free nerve endings
, Which statement accurately describes the structure of a tactile (Meissner's)
corpuscle? - CORRECT ANSWER-Two or more sensory fibers that end as tiny
knobs branch within an oval mass of flattened connective tissue cells
List three types of stimuli detected by lamellated (Pacinian) corpuscles. - CORRECT
ANSWER-vibration
stretch
heavy pressure
Match the temperature with the type of sensory receptor responsive to it. -
CORRECT ANSWER-85o F (29oC) - warm thermoreceptors
58o F (14oC) - cold thermoreceptors
32o F (0oC) - pain receptors
Name the two types of thermoreceptors. - CORRECT ANSWER-warm
cold
True or false: Temperatures below 40 degrees C (113 degrees F) will stimulate pain
receptors. - CORRECT ANSWER-false
Structurally, thermoreceptors are ______. - CORRECT ANSWER-free nerve endings
Which type of receptor adapts very little, if at all? - CORRECT ANSWER-pain
receptors
While viscera have several kinds of receptors, what type of visceral receptor is the
only one to provide conscious sensation? - CORRECT ANSWER-pain receptors
A person can experience sharp pain when intestinal tissues are stretched or when a
smooth muscle in the intestinal wall undergoes a spasm. What causes the resulting
strong pain? - CORRECT ANSWER-release of pain-causing chemicals
low tissue oxygen levels due to reduced blood flow
stimulation of mechanoreceptors
Describe the structures that act as pain receptors. - CORRECT ANSWER-free nerve
endings
Receptors for ______ can be stimulated by different types of stimuli such as
mechanical damage, extreme changes in temperature, chemical stimulation, or
ischemia (disrupted blood flow). - CORRECT ANSWER-pain
What is meant by the term referred pain? - CORRECT ANSWER-Pain signals from
the viscera feel like they are coming from a different part of the body.
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