Module 5

Question 1

What are the 3 types of muscles in the body?

Answer 1

smooth
cardiac
skeletal

Question 2

Where can smooth muscle be found in the body?

Answer 2

stomach
urinary bladder
uterus
arteries
veins

Question 3

Where can cardiac muscle be found in the body?

Answer 3

in heart tisue

Question 4

Where can skeletal muscle be found in the body?

Answer 4

with in the muscles of the body

attached to the skeleton

Question 5

What are the 3 types of muscle fibers?

Answer 5

type l (slow twitch)
type lla (fast/intermediate  twitch)
type llx (fast twitch)

Question 6

What are the characteristics of type l muscle fiber?

Answer 6

slow contraction speed
high resistance to fatigue
low force generation
red in color
oxidative energy system
2+ minute activities (low intensity)

Question 7

What are the characteristics of type lla muscle fibers?

Answer 7

intermediate contraction speed
intermediate resistance to fatigue
moderate force generation
pink in color
phosphagen and glycolytic energy system
10 sec- 2 min activities (moderate intensity)

Question 8

What are the characteristics of type llx muscle fibers?

Answer 8

fast contraction speed
low resistance to fatigue
high force generation
white in color
phosphagen energy system
1-10 sec activities (high intensity)

Question 9

Define muscular force

Answer 9

the force applied to overcome resistance

Question 10

Define muscular strength

Answer 10

the ability to generate maximal force against resistance

Question 11

Define muscular endurance

Answer 11

the ability to sustain an effort for a long period of time

Question 12

Define muscular power

Answer 12

the ability to exert optimal force rapidly

Question 13

What is the order of events prior to the sliding filament theory?

Answer 13

1. action potential moves along alpha motor neuron
2. action potential arrives at sarcolema
3. action potential moves down the t tubules into the sarcoplasmic reticulum
4. calcium is released
5. calcium binds to troponin
6. tropomyosin changes shape & the binding site on actin is revealed

Question 14

What is concentric muscle contraction?

Answer 14

the muscle shortens as it created tension

forced generated with in the muscle to shorten it are greater than the external forces acting to stretch it

Question 15

What is eccentric muscle contraction?

Answer 15

the muscle lengthens as it created tension

forces generated with in the muscle to shorten it are less than the external forces acting to stretch it`

Question 16

What is isometric muscle contraction?

Answer 16

muscles length does not change

contractile force = resistance force