muscular system

Question 1

system of the human body that provides motor
power for all movements of the body.

Answer 1

Muscular system

Question 2

Muscular system is composed of specialized cells called_____, or
muscle fibers.

Answer 2

myocytes

Question 3

are body tissues that provide the force for all body movements.

Answer 3

Muscles

Question 4

There are more than ____ muscles in the body, with ___ known muscles
with names.

Answer 4

700, 639

Question 5

Functions for the muscular system (7)

Answer 5

1. Movement of the body
2. Maintenance of posture
3. Respiration
4. Production of body heat
5. communication
6. constriction of organs and vessels
7. Contraction off the heart

Question 6

Contraction of skeletal muscles is responsible for the overall movements of the body, such as walking, running, and manipulating objects with the hands.

Answer 6

Movement of the body

Question 7

Skeletal muscles constantly maintain tone, which keeps us sitting or standing erect.

Answer 7

Maintenance of posture

Question 8

Contraction of the skeletal muscles of the thoracic cage, as well as the diaphragm, helps us breathe.

Answer 8

Respiration

Question 9

When skeletal muscles contract, heat is given off as a by-product. This released heat is critical to the maintenance of body temperature.

Answer 9

Production of body heat

Question 10

Skeletal muscles are involved in all aspects of communication, including speaking, writing, typing, gesturing, and facial expressions.

Answer 10

Communication

Question 11

The contraction of smooth muscle within the walls of internal organs and vessels causes those structures to constrict. This constriction can help propel and mix food and water in the digestive tract, propel secretions from organs, and regulate blood flow through vessels.

Answer 11

Constriction of organs and vessels

Question 12

The contraction of cardiac muscle causes the heart to beat, propelling blood to all parts of the body.

Answer 12

Contraction of the heart

Question 13

Constitutes approximately 40% of the
body weight.

Answer 13

Skeletal muscle

Question 14

Attached to bones

Answer 14

Skeletal muscle

Question 15

Voluntary and striated (somatic NS)

Answer 15

Skeletal muscle

Question 16

• Located only in the heart
• Involuntary, striated (autonomic NS)

Answer 16

cardiac muscle

Question 17

• Can be found on visceral hollow
organs like the stomach, trachea, and
urinary bladder
• Involuntary, not striated (Autonomic NS)

Answer 17

Smooth muscle

Question 18

Ability of muscle to shorten forcefully or contract.

Answer 18

Contractility

Question 19

Ability of muscle to respond to stimulus

Answer 19

Excitability

Question 20

Muscles can be stretched beyond its normal resting length
and still be able to contract

Answer 20

extensibility

Question 21

Ability of muscles to recoil to its original resting length after
it has been stretched.

Answer 21

Elasticity

Question 22

The protein fibers of the three layers merge at the
ends of most muscles to from tendons.

Answer 22

Tendon

Question 23

forms a connective tissue sheath that surrounds each skeletal muscle.

Answer 23

epimysium

Question 24

subdivides each whole muscle into numerous, visible bundles of muscle fibers (cells) called fascicles (FAS-i-kuhls).

Answer 24

perimysium

Question 25

The protein fibers of the_____ gradually merge with a layer of connective tissue between adjacent muscles and connecting the skin to superficial muscles. These outer layers of connective tissue separate the muscles from nearby structures.

Answer 25

epimysium

Question 26

a loose connective tissue serving as passageways for blood vessels and nerves that supply each fascicle.

Answer 26

perimysium

Question 27

• is a delicate layer of connective tissue that separates the individual muscle fibers within each fascicle.
• serves as passageways for nerve fibers and blood vessels that supply each separate muscle fiber.

Answer 27

endomysium