How much of the total body weight of the average adult is muscle tissue?
The different types of muscle tissue differ from each other by?
Microscopic anatomy, location, and type of control
Which of the following is NOT a major function of muscle tissue?
This is the property of muscle that gives it the ability to stretch without damage.
Is an isometric contraction the muscle develops tension but does not?
This is a band of connective tissue that surrounds muscles
When connective tissue extends as a broad flat layer, the tendon is referred to as
For every nerve that penetrates a skeletal muscle there are general how many arteries and veins?
One artery and one or two veins
Axon terminal clusters at the ends of neuromuscular junctions are referred to as:
Synaptic end bulbs
After the fusion of myoblasts, the muscle fiber loses its ability to do what?
Grow, lengthen, contract, and go through mitosis
The sequence that muscle action potentials must go through to excite a muscle cell
Myofibrils, myofilaments, mitochondria
The mitochondria in muscle fiber are arranged
Closest to the sarcolemma
These are the contractile organelles of the muscle fiber.
This is part of the skeletal muscle cell releases calcium when stimulated by the T-tubules.
Terminal cisterns of sarcoplasmic reticulum
The sarcoplasmic reticulum is used for storing
Which of the following contain thin filaments?
I band, A band, and H zone
Which of the following contain thick filament?
Zone of overlap, A band, and H zone
Contractile proteins, regulatory proteins, and structural proteins
Which of the following functions as a motor protein in all three types of muscle tissue?
What regulatory proteins can be found on an actin molecule?
Tropomyosin and Troponin
Titin is found in a sarcomere
From M line to Z disc
Which of the following is used to reinforce the sarcolemma?
In the sliding filament mechanism, the thin filament is being pulled towards the
The sarcoplasmic reticulum releases calcium ions into the cytosol
At the beginning of a contraction
What energizes the myosin head?
ATP hydrolysis reaction
What is needed for the contraction cycle to continue?
Ca, ATP, and ACh
This results from a muscle action potential propagating along the sarcolemma and into the T tubules.
The signal to excite a muscle cell must cross the neuromuscular junction by the diffusion of acetylcholine across the
How many molecules of acetylcholine need to bind to open the ion channel of the ACh receptor?
How do muscles produce ATP?
Creatine phosphate, anaerobic cellular respiration, and aerobic cellular respiration
Creatine phosphate and ATP together create enough energy for a muscle to contract for
This consists of a somatic motor neuron plus all the skeletal muscle fibers it stimulates.
This is a brief contraction of all muscle fibers in a motor unit in response to a single action potential.
This is also referred to as the period of lost excitability
A sustained contraction is
Increasing the number of active motor units is called
Motor unit recruitment
This is the least powerful type of muscle fiber.
Slow oxidative fiber
Which of the below structures is found in cardiac muscle tissue but not skeletal muscle tissue?
Which of the following exhibits autorhythmicity?
Cardiac muscle fibers
Smooth muscle tone is due to the prolonged presence of what in the cytosol?
An increase in the number of muscle fibers