Transcript Clicker Review: Unit 4 Muscular System

Clicker Review:
Unit 4 Muscular System
Which of the following is not a function
of the muscular system?
1.
2.
3.
4.
5.
Movement
Thermogenesis
Maintain posture
Support joints
All are functions
Muscle fibers are considered “excitable.”
What does this mean?
1. They can shorten & thicken
2. They can produce electrical signals
3. They can elongate without damaging the
tissue
4. The can return to their original position
Which of the following is not a difference
between the 3 types of muscular tissue?
1.
2.
3.
4.
5.
Smooth & cardiac tissue contract involuntarily but skeletal tissue
contracts voluntarily
Smooth & cardiac tissue have 1 nucleus but skeletal tissue is
multinucleated
Smooth & cardiac muscle cells are joined by electrical junctions
but skeletal muscle cells are joined by neuromuscular junctions
Both 1 & 2
Statements #1-3 are true.
Muscle cells are called…?
1.
2.
3.
4.
myofibrils
myofilaments
fibers
sarcomeres
The immovable end of a muscle is called
the …?
1.
2.
3.
4.
Insertion
Proximal tendon
Distal tendon
Origin
Muscles that contract and assist the prime
mover are called…
1.
2.
3.
4.
Agonists
Synergists
Antagonists
Fixators
What is this called?
1.
2.
3.
4.
5.
perimysium
epimysium
endomysium
Fasicle
Fascia
What is this called?
1.
2.
3.
4.
5.
perimysium
epimysium
endomysium
Fasicle
Fascia
What is this called?
1.
2.
3.
4.
5.
perimysium
epimysium
endomysium
Fasicle
Fascia
What proteins make up the “thin” filaments?
1.
2.
3.
4.
Myosin, actin, myofilaments
Myosin, actin, troponin, tropomyosin
Actin, troponin, tropomyosin
troponin, tropomyosin
What is this synapse called?
1.
2.
3.
4.
Motor endplate
Chemical synapse
Neuromuscular junction
Neurotransmitter junction
What is this structure?
1.
2.
3.
4.
Muscle fiber
Sensory cell
Motor neuron
None of the above
What are the “purple circles?”
1.
2.
3.
4.
vesicles
neurotransmitters
mitochondria
Acetylcholine receptor sites
What is the functional unit of a muscle?
1.
2.
3.
4.
Sarcomere
Neuromusclualr junctions
Muscle fibers
Actin and myosin
When 1 neuron (nerve cell) sends a signal to
25 muscle fibers, this group is called a what?
1.
2.
3.
4.
muscle
Nerve group
Neurotransmitter cluster
Motor unit
What makes up the red line?
1.
2.
3.
4.
Actin
Myosin
Troponin
Myofibril
The myofilaments have decreased in length to
achieve contraction.
1. TRUE
2. FALSE
What causes Myosin to release from Actin?
1.
2.
3.
4.
Troponin
Tropomyosin
ATP
Calcium
What pulls the actin filaments inwards to shorten
a muscle?
1. Sarcomeres
2. Myosin
3. Sarcoplasmic reticulum
4. T-tubule
When the nervous impulse stops, what happens?
1. Tropomyosin is moved & uncovers the myosin
binding sites
2. Acetylcholine is released into the synaptic cleft
3. ATP is no longer produced
4. Calcium is pumped into the sarcoplasmic
reticulum
What is the name of this muscle?
1.
2.
3.
4.
Masseter
Semitendonosous
Zygomaticus
Platysma
5. Serratus anterior
What is the name of this muscle?
1.
2.
3.
4.
5.
Masseter
Platysma
Obicularis oris
Buccinator
Rectus femoris
What is the name of this muscle?
1.
2.
3.
4.
5.
Serratus anterior
Rectus abdominus
Vastus lateralis
External abdominal oblique
Gracilis
What is the name of this muscle?
1.
2.
3.
4.
5.
Soleus
Gastrocnemius
Vastus lateralis
Sartorius
Gracilis
What is the name of this muscle?
1.
2.
3.
4.
5.
Vastus medialis
Semitendonosus
Semimembranosus
Biceps brachii
Biceps femoris