Ch.12 Part A

Question 1

17) What two structures are primarily moved by muscles?

Answer 1

17) *Bones and Visceral

Question 2

25) Several fascicles that are stimulated by a single efferent neuron are called a single;

Answer 2

25) motor unit*

Question 3

28) Which of the following is NOT a characteristic of slow twitch muscles;

Answer 3

28) more mitochondria
More capillaries (more gas exchange)
Myoglobin

Question 4

9) Which of the following is NOT a primary function of muscles?

Answer 4

Motion, heat , tension

Question 5

5) When cells can contract without needing an action potential from a nerve, this is called;

Answer 5

5) Authrytemtic

Question 6

36) The membranous internal structures which surround myofibrils and release calcium during a contraction are called;

Answer 6

36) sacroplasmic reticulum

Question 7

31) Muscle sheaths converge and become;

Answer 7

31) tendons

Question 8

16) The smallest contractile unit of muscle tissue, composed of actin and myosin filaments is a;

Answer 8

16) Myoyfibril

Question 9

13) The darker color of the meat in a drumstick at KFC is due to the presence of high levels of ___ in the meat.

Answer 9

13)Myoglobin / mitochondria

Question 10

21) A muscle fiber and a muscle cell are the same thing; T/F

Answer 10

21) T

Question 11

14) Muscles that increase or decrease the angle between bones are known as (respectively);

Answer 11

14) Flexor decrease / Extensor Increase

Question 12

10) The elastic anchor molecule that allows elasticity and extensibility of muscles is called;

Answer 12

10) Titin

Question 13

32) Why do skeletal muscles have multiple nuclei?

Answer 13

32)To have local DNA protien Synthesis

Question 14

22) If muscles do their primary job, what two things do they generate (primarily)?

Answer 14

22)** Generate force for movement

And Generates heat

Question 15

24) A bundle of muscle fibers is called a;

Answer 15

24) Fascicle

Question 16

18) The more cross bridges that a contractile unit can form the more what does it produce?

Answer 16

18) Tension / force

Question 17

2) What types of cavities do muscles support?

Answer 17

2) abdominal cavity

Question 18

3) Which of the following is NOT true of cardiac muscle cells?

Answer 18

3) involuntary and autrythmic

Question 19

35) Why are t-tubules so vital to muscle contraction?

Answer 19

35) * they allow action potiential generated on surface to reach the myofilament

Question 20

15) How do muscles help with body temperature maintenance?

Answer 20

15) Generating heat as a by product that helps with maintenance of body Temperature

Question 21

11) What muscle pairs work in opposition to each other?

Answer 21

11) antagonist

Question 22

34) The extensions of the cell membrane inside the muscle cell are called;

Answer 22

34) T-Tubules

Question 23

7) Skeletal muscles are the only muscles in the body which are voluntary T/F

Answer 23

7) T

Question 24

8) Most skeletal muscles are attached (at least one end) to;

Answer 24

8) bone

Question 25

26) The thick fibers of the contractile unit (with moving heads) are called;

Answer 25

26) sacromer

Question 26

12) Muscles can lengthen forcefully; T/F

Answer 26

12)F

Question 27

33) The muscle cell membrane is called the;

Answer 27

33) scarolema

Question 28

29) Most muscles are composed of only one motor unit; T/F

Answer 28

29)F

Question 29

6) What type of muscle cell is found in places like the GI tract, blood vessels, and skin?

Answer 29

6) Smooth Muscle*

Question 30

4) Which of the following is NOT an activity that fast/slow twitch muscles would be used for (respectively)

Answer 30

4) Know examples

Fast/ delicate playing piano , sprinting

Question 31

30) The thin fibers of the contractile unit are called;

Answer 31

30) Actin

Question 32

27) Which twitch type of muscle cells fatigue more easily?

Answer 32

27) Anaerobic

Question 33

20) The liquid internal portion of muscle cells is called;

Answer 33

20) sacroplasma