Lecture 4: Histology III Flashcards
Which two muscles are striated?
Skeletal and Cardiac
Skeletal muscle is surrounded by a connective tissue layer known as the:
A. Perichondrium
B. Perimysium
C. Periosteum
D. Epimysium
D. Epimysium
The muscle belly can be subdivided into smaller units called ___
fasicles
Each fascicle is surrounded by a connective tissue called the:
A. Perichondrium
B. Perimysium
C. Periosteum
D. Epimysium
B. Perimysium
Muscle fibers are surrounded by a connective tissue known as the
A. Perichondrium
B. Perimysium
C. Periosteum
D. Epimysium
E. Endomysium
E. Endomysium
Muscle belly is surrounded by the deep fascia, also known as the ____
epimysium
Thin filaments are __ while thick filaments are ___
A. actin forming A bands
B. actin forming I bands
C. myosin forming A bands
D. myosin forming I bands
B., C
Voluntary muscle is innervated by the ____ nervous system
PNS
____: contractile units of the skeletal muscle
Sarcomere
What type of neurons innervate the motor neurons?
Motor neurons
The synaptic ends of peripheral nerve fibers form specialized synapses called _____
motor endplates
What NT do motor units use?
Ach
True or False: the motor unit = axon / N muscle fibers
T
True or False: the motor unit = axon / N muscle fibers
True
What type of fibers are found in cardiac muscle?
A. muscle fibers
B. collagen fibers
C. elastin fibers
A. muscle fibers
Which type of muscle has 1 central nucleus/cell?
A. Skeletal
B. Cardiac
C. Smooth
B. Cardiac
Which type of muscle has elongated cells with a central nucleus?
A. Skeletal
B. Cardiac
C. Smooth
C. Smooth
True or False: Fine motor skills are associated with more motor plates while gross motor skills are associated with fewer motor plates
True
Which is an example of whole (hollow) organ?
A. Intestine and stomach
B. Liver
A. Intestine and stomach
Which is an example of a solid organ?
A. Intestine
B. Liver or Kidney
B. Liver or Kidney
True or False: Muscle fibers are uninucleated and nuclei is located at periphery
False (multinucleated) - nuclei are located at cell periphery
Is cardiac muscle multi-nucleated/uni?
Is the nucleus centrally located or peripherally?
Uni-nucleated, centrally located
What are the two types of hollow organs?
Viscera and vessels
