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Worksheets

Muscular System

Total questions: 22

Worksheet time: 11mins

Name
Class
Date
1.

Which of these is NOT a major task of the muscular system?

a)

Movement for your body

b)

Heat production for the body

c)

Maintaining posture

d)

 Making red blood cells

2.

Which of the following words means “the ability to recoil or bounce back to the original shape”?

a)

excitability

b)

contractibility

c)

extensibility

d)

elasticity

3.

Which type of muscle is involuntary and makes up many of your internal organs?

a)

skeletal

b)

smooth

c)

gastrointestinal

d)

cardiac

4.

Which type of muscle(s) is/are nonstriated?

a)

skeletal muscle

b)

cardiac muscle

c)

smooth muscle

5.

Which membrane covers an individual muscle fiber?

a)

endomysium

b)

epimysium

c)

perimysium

6.

What type of channel on the axon terminal is stimulated by an incoming action potential and allows Calcium to enter the axon?

a)

chemically-gated

b)

voltage-gated

c)
  1. myosin-gated

7.

When Calcium ions enter the neuromuscular junction, what neurotransmitter is released across the synaptic cleft?

a)

Calcium

b)

Acetylcholine

c)
  1. K+

d)

Na+

8.

What attaches muscle to bone?

a)

ligaments

b)

tendons

c)

sliding filaments

d)

sarcomeres

9.

Which two structures block the active site on an actin filament?

a)

z-disc & the m-line

b)

calcium & myosin

c)

troponin & tropomyosin

d)

actin & perimysium

10.
  1. The ______________ separate one sarcomere from another. 

a)

cross bridges

b)

Z-discs

c)

M-lines

d)

active sites

11.
  1. When myosin heads make a cross bridge and bend pulling the actin myofilament toward the center of the sarcomere, it is called the ________________.

a)

power stroke

b)

neuromuscular junction

c)

return stroke

d)

ATP contraction

12.

The deltoid is attached to the clavicle and the humerus.  Which one of these points is the insertion?

a)

clavicle

b)

humerus

c)

neither, the deltoid doesn’t have an insertion

13.
  1. When you do sit-ups, your rectus abdominus is the _________________ and the latissimus dorsi is the _________________.

a)

insertion; origin

b)

origin; insertion

c)

antagonist; prime mover

d)

prime mover; antagonist

14.
  1. How much ATP is used in each myosin/actin cross-bridge cycle?

a)

1

b)

2

c)

3

d)

4

15.
  1. When you become out of breath and your muscles begin to burn during a workout, this is caused by

a)

lack of calcium

b)

lack of water

c)
  1. lack of oxygen

d)

lack of acetylcholine

16.
  1. During rigor mortis, __________ floods the muscle fibers but a lack of ____________ prevents them from detaching.

a)

Calcium, ATP

b)

ATP, Calcium

c)

oxygen, ATP

17.

Essential to making plenty of ATP in cellular respiration

a)

Calcium

b)

ATP

c)

Sarcoplasmic reticulum

d)

Oxygen

e)

Epimysium

18.

Myofilament that is essential to muscle contraction

a)

Calcium

b)

ATP

c)

Sarcoplasmic reticulum

d)

Actin

e)

Epimysium

19.
  1. Outer membrane found around the belly of the muscle

a)

Calcium

b)

ATP

c)

Sarcoplasmic reticulum

d)

Actin

e)

Epimysium

20.

Covers each muscle fiber and conducts impulses

a)

Calcium

b)

ATP

c)

Sarcoplasmic reticulum

d)

Actin

e)

Epimysium

21.

Comes in from a nerve cell to remove molecules blocking active sites

a)

Calcium

b)

ATP

c)

Sarcoplasmic reticulum

d)

Actin

e)

Epimysium

22.

Prepares a myosin head for its power stroke

a)

Calcium

b)

ATP

c)

Sarcoplasmic reticulum

d)

Actin

e)

Epimysium