Multiple Choice Questions

Which type of muscle fiber has a large quantity of glycogen and mainly uses glycolysis to synthesize ATP?
  • glycolysis
  • acromion of the scapula
  • white fast twitch fibers
  • Actin
EGTA is a substance that binds calcium ions. Imagine an experimental setup with a motor neuron and a muscle fiber. Stimulation of the motor neuron causes contraction of the muscle fiber through activity at the neuromuscular junction and excitation-contraction coupling. Now, inject the muscle fiber with EGTA. Which of the following effects would EGTA have on excitation-contraction coupling after the neuron releases acetylcholine at the neuromuscular junction?
  • an action potential traveling along the t tubule
  • Release of acetylcholine from the synaptic vesicles
  • It would prevent myosin from forming cross bridges with actin
  • If it affected the phrenic nerve, the diaphragm muscle would be paralyzed
To keep the humeral head centered within the glenoidal cavity the rotator cuff muscles must be __________.
  • white fast twitch fibers
  • pronator teres
  • located in the same plane
  • dehydration synthesis
The prime mover of dorsiflexion is the __________.
  • tibialis anterior
  • femoral nerve
  • ischial tuberosity
  • spinalis thoracis
The subscapularis muscle inserts on the __________.
  • femoral nerve
  • lesser tubercle of the humerus
  • radial tuberosity
  • coracoid process of the scapula
At its insertion (unlike at its origin), the buccinator muscle __________.
  • attaches to fibers of another facial muscle
  • metacarpal two
  • compression of the abdomen to assist in forced expiration
  • dehydration synthesis
Which of the following processes produces molecules of ATP and has two pyruvic acid molecules as end products?
  • Krebs cycle and oxidative phosphorylation
  • skeletal muscle
  • glycolysis
  • white fast twitch fibers
Of all the flexor muscles of the forearm, the __________ is the shortest.
  • pronator teres
  • motor neuron
  • spinalis thoracis
  • radial tuberosity
Cells are multinucleate; is long and cylindrical in shape; contains a well-developed sarcoplasmic reticulum
  • femoral nerve
  • pronator teres
  • spinalis thoracis
  • skeletal muscle
The actions of the extensor carpi radialis brevis are localized to the __________.
  • wrist
  • extend digits
  • extensor digitorum
  • metacarpal two
The origin of the serratus anterior includes __________ ribs.
  • extend digits
  • facial nerve
  • compression of the abdomen to assist in forced expiration
  • 8
The buccinator muscle __________.
  • tibialis anterior
  • compression of the abdomen to assist in forced expiration
  • lesser tubercle of the humerus
  • compresses the cheeks
The "rest and recovery" period, where the muscle restores depleted reserves, includes all of the following processes
  • pyruvic acid is converted back to lactic acid
  • acromion of the scapula
  • Abduction
  • -ATP is used to rephosphorylate creatine into creatine phosphate.-Oxygen rebinds to myoglobin.-Glycogen is synthesized from glucose molecules.
Contains intercalated discs; is found in the heart
  • femoral nerve
  • facial nerve
  • Cardiac muscle
  • Smooth muscle
Some nerve agents have been used as bioweapons. Unfortunately, Sarin gas has been used as a bioweapon several times in other countries. Sarin is an acetylcholinesterase (AChE) inhibitor and even exposure to low levels can be fatal. Based on your knowledge of muscle physiology, why do you think Sarin has these effects?
  • spinalis thoracis
  • Muscles will contract and be unable to relax, known as spastic paralysis. This can cause spasms of the diaphragm and bronchi, which lead to asphyxiation
  • Release of acetylcholine from the synaptic vesicles
  • It would prevent myosin from forming cross bridges with actin
Found in digestive organs and blood vessels
  • skeletal muscle
  • Smooth muscle
  • femoral nerve
  • Cardiac muscle
The actions of the muscles that cross the hip do not include __________.
  • compression of the abdomen to assist in forced expiration
  • extend digits
  • wrist
  • inversion
Which of the following processes produces 36 ATP?
  • Actin
  • attaches to fibers of another facial muscle
  • lesser tubercle of the humerus
  • Krebs cycle and oxidative phosphorylation
Conduction of an action potential along the sarcolemma depends upon ___________.
  • acromion of the scapula
  • diffusion of sodium ions through voltage-gated channels
  • Release of acetylcholine from the synaptic vesicles
  • an action potential traveling along the t tubule
The "rest and recovery" period, where the muscle restores depleted reserves, includes all of the following processes EXCEPT __________.
  • plantar flexion; gastrocnemius
  • -ATP is used to rephosphorylate creatine into creatine phosphate.-Oxygen rebinds to myoglobin.-Glycogen is synthesized from glucose molecules.
  • acromion of the scapula
  • pyruvic acid is converted back to lactic acid
The coracobrachialis muscle originates on the __________.
  • lesser tubercle of the humerus
  • coracoid process of the scapula
  • an action potential traveling along the t tubule
  • compression of the abdomen to assist in forced expiration
A reduction in the lateral angle of the glenohumeral joint in relation to the anatomical position would be called __________.
  • glycolysis
  • adduction
  • wrist
  • Actin
What causes the release of calcium ions into the sarcoplasm from the terminal cisterns?
  • dehydration synthesis
  • Release of acetylcholine from the synaptic vesicles
  • an action potential traveling along the t tubule
  • diffusion of sodium ions through voltage-gated channels
elevates mandible during chewing
  • compresses the cheeks
  • femoral nerve
  • masseter
  • facial nerve
Acetylcholinesterase inhibitors have therapeutic value in the treatment of some medical conditions and diseases. Which of the following do you think would be a clinical application of these drugs?
  • attaches to fibers of another facial muscle
  • adduction
  • Myasthenia gravis, a disease in which the ACh receptors are damaged and the muscle becomes progressively weaker.
  • Muscles will contract and be unable to relax, known as spastic paralysis. This can cause spasms of the diaphragm and bronchi, which lead to asphyxiation
Botulinum toxin is a very powerful toxin produced by the bacteria Clostridium botulinum. It is the cause of the sometimes fatal disease, known as botulism. This toxin prevents the release of ACh from the motor neuron. What effect will it have on muscle function?
  • Muscles will contract and be unable to relax, known as spastic paralysis. This can cause spasms of the diaphragm and bronchi, which lead to asphyxiation
  • If it affected the phrenic nerve, the diaphragm muscle would be paralyzed
  • The muscle will be unable to contract, known as paralysis
  • attaches to fibers of another facial muscle
The actions of the internal obliques include __________.
  • extend digits
  • compresses the cheeks
  • compression of the abdomen to assist in forced expiration
  • wrist
The extensor muscle that branches to form four tendons on the back of the hand is the __________.
  • extensor digitorum
  • metacarpal two
  • extend digits
  • teres major
The hamstring muscles originate on the __________.
  • lesser tubercle of the humerus
  • facial nerve
  • spinalis thoracis
  • ischial tuberosity
Eversion of the foot is a function of the __________.
  • extend digits
  • femoral nerve
  • fibularis longus
  • inversion
The insertion of the extensor carpi radialis longus muscle is on __________.
  • metacarpal two
  • motor neuron
  • femoral nerve
  • extend digits
The action of the extensor digitorum longus muscle is to __________.
  • inversion
  • extend digits
  • extensor digitorum
  • wrist
The vastus lateralis is innervated by the __________.
  • tibial nerve
  • fibular nerve
  • sacral nerve
  • femoral nerve
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Multiple Choice Questions
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