Exam 3 2018 Flashcards
which muscle fasicle organization is described as “broad at one end and narroaw at the other”
HInt pectoralis major is a classic example
a. fusiform
b. parallel
c. convergent or triangular
d. unipennate
e. circular
C
a muscle fascicle is a
a. bundle of myofibrils
b. bundle of collagen fibers
c. bundle of muscle fibers
d. single muscle cell
e. bundle of actin and myosin
C
which of the following is not considered an indirect muscle attachment
a. epimysium of one muscle attaches to fascia of another muscle
b. epimysium is continous with the periosteum of bone
c. epimysium connects to the dermis of the skin
d. epimysium connects to bone by way of an aponeurosis
e. all of the above are indirect muscle attachments
B
the three classes of muscle tissue are
a. skeletal, smooth, involuntary
b. skeletal cardiac, smooth
c. skeletal, involuntary, excitable
d. excitable, striated, smooth
e. cardiac, involuntary, striated
B
which is not a function of skeletal muscle
a. movement
b. heat production
c. stability
d. communication
e. all of these are functions of skeletal muscle
E
what is the order of connective tissue layers of skeletal muscle from superficial to deep
fascia, epimysium, perimysium, endomysium
where are the nuclei of skeletal muscle cells located
a. flattened and pressed against the inside of the sarcolemma
b. within the sarcoplasmic reticulum
c. packed into the spaces between the myofibrils
d. between the sarcolemma and the endomysium
e. there are no nuclei within skeletal muscle, they are absent to give room for contractile proteins
A
a triad of skeletal muscle is described as
a. the axon to soma connection
b. three myosin molecules and one actin molecule
c. three sarcolemma bound together by endomysium
d. A T (transverse) tubule and two terminal cisterns
e. a group of skeletal muscles that all perform the same action
D
action potentials (electrical signals are propagated from the sarcolemma to the interior of a muscle fiber by way of
a. the sacromeres
b. the sarcoplasmic reticulum
c. the endomysium
d. the myofibrils
e. the T (transverse) tubules
E
what structure stores calcium ions that trigger contraction
a. mitochondria
b. myofibrils
c. T tubules
d. sarcoplasmic reticulum
e. synaptic vasicles
D
which of the following is considered to be a regulatory protein of the myofilaments
a. g actin
b. keratin
c. troponin
d. myosin
e. calcium
C
the striations of skeletal muscle are indicated by (caused by):
a. the location of actin and myosin in the cytoskeleton
b. the location of perimysium and fasicle organization
c. the location of satellite cells
d. the location of troponin and tropomyosin on G actin
e. none of the above cause skeletal muscle to be classified as striated
A
thick filaments are comprised of the protein _____ while thin filaments are comprised of the protein __________
a. myosin; actin
b. actin;myosin
c. myosin; titin
d. titin;actin
e. keratin; melanin
A
the region of a sacromere where actin and myosin overlap is
a. the z disc
b. the h band
c. the i band
d. the a band
e. the big band
D
the light areas of a microscopic sacromere contain
a. myosin
b. actin
c. z disc
d. h band
e. both b and c above are in the light staining areas of a sacromere
e
besides the nervous system, which of the other body systems plays a direct role in controlling body funciton
a. integumentary system
b. endocrine system
c. muscular system
d. skeletal system
e. epithelial system
B
which of the following is not a characteristic of the somatic motor division of the nervous system
a. is a subdivision of the efferent division
b. is a subdivision of the peripheral nervous system
c. is a subdivision of the sympathetic nervous system
d. sends signals to skeletal muscles to contract
e. all of the above are characteristics of the somatic motor division of the nervous system, there is no exception listed
C
the autonomic nervous system is also known as the (carries information about):
a. somatic motor division
b. visceral motor division
c. somatic sensory division
d. visceral sensory division
e. interneuron division
B
which of the following is not an anatomical classification of neurons
a. bipolar
b. unipolar
c. somatic motor
d. multipolar
e. anaxonic
C
which of the following neurons are typically found in special sense organs
a. multipolar neruons
b. bipolar neurons
c. unipolar neurons
d. anaxonic neurons
e. schwann cells
C
the connection of the axon to the soma is known as the
a. axon hillock
b. axon terminal
c. dendrite
d. terminal arbhorization
e. synapse
A
the organelles of a neuron are typically found in the ____________ of the neuron
a. axon
b. dendrites
c. soma
d. terminal arbhorization
e. synapti knobs
C
the thin, branched processes of a neuorn whose main function is to recieve incoming signals are the
a. soma
b. axons
c. dendrites
d. axon hillcock
e. all of the above
C
satelite cells of the PNS
a. provide centrioles to produce more PNS neurons since PNS neurons cannot divide themselves
b. are glial cells that protect the axons of PNS neurons
c. are glial cells that protect the somas of PNS neurons
d. are found primarily in ganglia of PNS neurons
e. both c and d are correct statements concerning PNS satelite cells
E
