Chapter 10

Question 1

what is muscle tension

Answer 1

Generation of force by all muscle tissue;
creates movement, maintains posture, stabilizes joints,
generates heat, and regulates the flow of materials through
hollow organs

Question 2

what are the muscle types

Answer 2

• skeletal
• cardiac
• smooth

Question 3

myo =

Answer 3

muscle

Question 4

sarco =

Answer 4

flesh

Question 5

skeletal muscle is

Answer 5

• long
• cylindrical
• striated
• multinucleated

Question 6

skeletal muscle - voluntary or involuntary?

Answer 6

voluntary

Question 7

cardiac muscle - voluntary or involuntary?

Answer 7

involuntary

Question 8

smooth muscle - voluntary or involuntary?

Answer 8

involuntary

Question 9

cardiac muscle is

Answer 9

• short
• wide
• branching
• striated
• one or two nuclei

Question 10

smooth muscle is

Answer 10

• thin
• smooth
• gap junctions
• single nucleus

Question 11

what is excitability

Answer 11

responsivity

is the ability to respond to a
stimulus (chemical, mechanical or electrical)

Question 12

what is contractility

Answer 12

is the ability to contract where proteins in the
cell draw closer together

Question 13

what is conductivity

Answer 13

is the ability to conduct electrical charges
across the plasma membrane

Question 14

what is distensibility

Answer 14

is the ability of a cell to be stretched without
being ruptured

Question 15

what is elasticity

Answer 15

is the ability of a cell to return to its original
length after it has been stretched

Question 16

skeletal muscle cells are called

Answer 16

skeletal muscle fibers or myocytes

Question 17

how many muscle cell fibers are in a fascicle

Answer 17

10 to 100

Question 18

a fascicle is a group of

Answer 18

muscle cell fibers

Question 19

shape of skeletal muscle fibers

Answer 19

• long
• thin

Question 20

ecm around skeletal muscle fibers

Answer 20

endomysium

Question 20

what is the endomysium

Answer 20

ecm around skeletal muscle fibers

Question 21

connective tissue to form a fascicle

Answer 21

perimysium

Question 21

what is a perimysium

Answer 21

connective tissue t oform a fascicle

Question 21

superficial connective tissue sheath around the epimysium

Answer 21

fascia

Question 21

The muscle cell’s cytoplasm

Answer 21

sarcoplasm

Question 21

what are myofibrils

Answer 21

Composed of hundreds to thousands of protein bundles called Myofilaments. Many myofibrils come together to make up a myocytes

Question 21

what is an epimysium

Answer 21

connective tissue around a group of fascicles

Question 21

The muscle cell’s plasma membrane

Answer 21

sarcolemma

Question 21

sarcoplasm

Answer 21

The muscle cell’s cytoplasm

Question 21

Bundles of specialized proteins, including those involved in muscle contraction

Answer 21

myofibrils

Question 21

connective tissue around a group of fascicles

Answer 21

epimysium

Question 21

sarcolemma

Answer 21

The muscle cell’s plasma membrane

Question 21

what do myofibrils consist of

Answer 21

- contractile proteins - regulatory proteins - structural proteins

Question 21

a modified smooth endoplasmic reticulum that forms a weblike network surrounding each myofibril

Answer 21

sarcoplasmic reticulum

Question 21

myofibrils

Answer 21

Bundles of specialized proteins, including those involved in muscle contraction

Question 21

what are the types of myofilaments

Answer 21

- thick - thin - elastic

Question 21

sarcoplasmic reticulum

Answer 21

a modified smooth endoplasmic reticulum that forms a weblike network surrounding each myofibril

Question 21

contractile proteins

Answer 21

produce tension

Question 21

regulatory proteins

Answer 21

Control when the muscle fiber can contract

Question 21

thin filaments

Answer 21

—Made up of contractile, regulatory, and structural proteins

Question 21

structural proteins

Answer 21

Hold the myofilaments in their proper places and ensure the stability of the muscle fiber

Question 21

thick filaments

Answer 21

—Largest diameter; composed of the contractile protein myocin * Includes two globular “heads” and two intertwining chains making up a “tail”; the head protrudes from the myosin tail

Question 21

in myosin

Answer 21

Includes two globular “heads” and two intertwining chains making up a “tail”; the head protrudes from the myosin tail

Question 21

what proteins are in thin filaments

Answer 21

- actin - tropomyosin - troponin