chapter 6 physiology

Question 1

the i band includes…
a. the h zone
b. the z lines
c. the zone of overlap
d. the m line

Answer 1

z lines

Question 2

What is directly triggered by calcium binding to troponin C?
a. exposure of actin binding sites
b. power stroke
c. cross bridge detachment
d. cross bridge. formation

Answer 2

exposure of actin binding sites

Question 3

phosphocreatine-creatine system description

Answer 3

Used for power surges for less than 10 seconds of muscle activity

Question 4

glycogen-lactic acid system description

Answer 4

Provides extra power during intermediate races, up to about 90 seconds of muscle activity

Question 5

Aerobic Metabolism description

Answer 5

Used for sustained long term muscle activity. Requires oxygen and mitochondria.

Question 6

All of the following are functions of muscle tissue EXCEPT
a. movement of limbs
b. propulsion of body fluids
c. generation of body heat
d. absorption of nutrients
e. maintenance of body posture

Answer 6

absorption of nutrients

Question 7

Which are extensions of sarcolemma through the muscle cell, and function to carrying electrical current into the cell?
a. t-tubules
b. sarcoplasmic reticulum
c. epimysium
d. myofibrils
e. myoblasts
f. perimysium
g. sarcoplasm
h. endomysium

Answer 7

t-tubules

Question 8

What is directly triggered by myosin hydrolyzing ATP into ADP and Pi?
a. power stroke
b. cross bridge formation
c. cross bridge detachment
d. exposure of actin binding sites

Answer 8

cross bridge formation

Question 9

All of the following are functions of muscle tissue EXCEPT
a. Exchange of blood gasses
b. movement of limbs
c. propulsion of body fluids
d. maintenance of body posture
e. generation of body heat

Answer 9

exchange of blood gasses

Question 10

Which regulates calcium storage, release and re-uptake in skeletal muscle cells?
a. t-tubules
b. sarcoplasmic reticulum
c. epimysium
d. myofibrils
e. myoblasts
f. perimysium
g. sarcolemma
h. endomysium

Answer 10

sarcoplasmic reticulum

Question 11

isometric muscle contraction description

Answer 11

Muscle develops tension, but does not shorten

Question 12

isotonic concentric muscle contraction description

Answer 12

Muscle shortens as tension remains constant

Question 13

isotonic eccentric muscle contraction description

Answer 13

Muscle lengthens while tension is maintained

Question 14

The A band includes…
a. the z line
b. zone of overlap
c. m line
d. h zone

Answer 14

h zone, m line, the zone of overlap

Question 15

The cell membrane of a muscle cell is called the
a. myoblasts
b. t-tubules
c. sarcoplasmic reticulum
d. myofibrils
e. epimysium
f. sarcolemma
g. perimysium
h. endomysium

Answer 15

sarcolemma

Question 16

isometric muscle contraction example

Answer 16

As you carry the box across the room

Question 17

isotonic concentric muscle contraction example

Answer 17

As you elevate/lift the box off of a table

Question 18

isotonic eccentric muscle contraction example

Answer 18

As you set the box down on a table

Question 19

cross bridge detachment occurs when…
a. myosin releases Pi and ADP
b. myosin hydrolyzes ATP to ADP and Pi
c. myosin binds to ATP
d. calcium binds to troponin C

Answer 19

calcium binds to troponin C

Question 20

thin filaments are compromised of…choose all that apply
a. troponin
b. tropomyosin
c. myosin
d. actin

Answer 20

actin, tropomyosin, troponin

Question 21

All of the following are functions of muscle tissue EXCEPT
a. production of white blood cells
b. movement of limbs
c. propulsion of body fluids
d. maintenance of body posture
e. generation of body heat

Answer 21

production of white blood cells

Question 22

What is directly triggered by ATP binding to myosin?
a. cross bridge detachment
b. power stroke
c. cross bridge formation
d. exposure of actin binding sites

Answer 22

cross bridge detatchment

Question 23

thick filaments are compromised of…
a. tropomyosin
b. troponin
c. myosin
d. actin

Answer 23

myosin

Question 24

specialized contractile cells are called?
a. myoblasts
b. t-tubules
c. sarcoplasmic reticulum
d. myofibrils
e. epimysium
f. sarcolemma
g. perimysium
h. endomysium

Answer 24

myofibrils

Question 25

All of the following are functions of muscle tissue EXCEPT…
a. movement of limbs
b. maintenance of body posture
c. generation of body heat
d. propulsion of body fluids
e. production of red blood cells

Answer 25

production of red blood cells

Question 26

type 1 skeletal muscle characteristics

Answer 26

requires oxygen, slow-twitch for longer distances, contains more myoglobin

Question 27

type 2 skeletal muscle characteristics

Answer 27

easily fatigued, larger fibers, anaerobic metabolism

Question 28

Tropomyosin is removed from the actin binding sites when?
a. calcium binds to troponin C
b. myosin releases Pi and ADP
c. myosin hydrolyzes ATP to ADP and Pi
d. myosin binds to ATP

Answer 28

calcium binds to troponin C

Question 29

The ______ surrounds the entire muscle, extending into the aponeuroses, fascia and tendons of the muscle
a. myoblasts
b. t-tubules
c. sarcoplasmic reticulum
d. myofibrils
e. epimysium
f. sarcolemma
g. perimysium
h. endomysium

Answer 29

epimysium

Question 30

the h zone is compromised of? choose all that apply
a. myosin
b. troponin
c. tropomyosin
d. actin

Answer 30

myosin

Question 31

what is directly triggered by myosin releasing the Pi and ADP?
a. cross bridge formation
b. cross bridge detatchment
c. exposure of actin binding sites
d. power stroke

Answer 31

power stroke

Question 32

Groups of muscle cells, called fascicles, are surrounded by a thin layer of dense connective tissue called the?
a. myoblasts
b. t-tubules
c. sarcoplasmic reticulum
d. myofibrils
e. epimysium
f. sarcolemma
g. perimysium
h. endomysium

Answer 32

perimysium