Ch 10 Muscle Tissue

Question 1

What are the common properties of muscle tissue?

Answer 1

excitability, contractility, extensibility, and elasticity

Question 2

What are the types of muscle tissue?

Answer 2

skeletal muscle, cardiac muscle, smooth muscle

Question 3

What are the major functions of skeletal muscle?

Answer 3

Producing movement
Maintaining posture and body position
Supporting soft tissues
guarding body entrances and exits
maintaining body temperature
storing nutrients

Question 4

What are the major functions of cardiac muscle tissue?

Answer 4

cardiac muscle tissue pumps blood through the cardiovascular system

Question 5

What are the major functions of smooth muscle?

Answer 5

smooth muscle tissue pushes fluids and solids along the digestive tract and other internal organs and regulates the diameters of small arteries

Question 6

How many layers of connective tissue is skeletal muscle surrounded by; what are they called?

Answer 6

epimysium (epi- on + mys, muscle) perimysium (peri- around,) endomysium (endo-, inside)

Question 7

Epimysium is a ____ layer of _____fibers that surrounds the _____ muscle.

Answer 7

dense, collagen, entire

Question 8

perimysium divides the skeletal muscle

Question 9

The perimysium divides the skeletal muscle into a series of compartments, each containing a bundle of muscle fibers called a _____.

Answer 9

fascicle

Question 10

The ______ surrounds the individual skeletal muscle cells (muscle fibers)

Answer 10

endomysium

Question 11

The collagen fibers of the epimysium come together to form bundles known as tendons, or broad sheets called aponeuroses. Tendons and aponeuroses generally do what?

Answer 11

attach skeletal muscles to bones

Question 12

How would severing the tendon attached to a muscle affect the muscle’s ability to move a body part?

Answer 12

Since tendons attach muscles to bones, severing the tendon would disconnect the muscle from the bone, and so the muscle could not move the body part

Question 13

The regulatory protein responsible for elasticity of skeletal muscles is ______.

Answer 13

titin

Question 14

Skeletal muscles develop from the conjoining of a group of embryonic cells known as _____

Answer 14

myoblasts

Question 15

The neuromuscular junction is a chemical synapse. An electrical signal (known as an action potential) from the motor neuron is converted into a chemical signal (ACh release). The skeletal muscle fiber responds to the chemical signal (ACh) by depolarizing and initiating an action potential. This action potential is propagated along the sarcolemma of the muscle fiber, which triggers sliding of the myofilaments for muscle contraction.