WorksheetsLecture 10: The Muscular System
Total questions: 13
Worksheet time: 8mins
A muscle fiber is
the same as a nerve fiber that is viewed by electron microscopy.
part of a striation of a muscle cell.
a muscle cell.
an intercalated disc.
encompasses the entire length of the muscle
All of these are functions of muscle tissue except
produces movement
maintains posture
generates heat
regulates entrances and exits
synthesizes the macromolecules
Contractions of these muscles are under voluntary control.
arrector pili muscles in the skin
muscles lining large blood vessels
skeletal muscle
cardiac muscle
muscles lining the respiratory tract
Visceral muscle refers to
skeletal muscle and cardiac muscle.
cardiac muscle and smooth muscle.
skeletal muscle and smooth muscle.
smooth muscle only.
skeletal muscle only.
The layer of connective tissue that surrounds the entire skeletal muscle is called the...
epicardium
perimysium
endomysium
exomysium
epimysium
The sarcoplasmic reticulum (SR) stores
sodium
calcium
ATPase
myosin
potassium
A motor unit includes
one motor neuron and all of the muscle fibers it innervates.
lymphatic vessels.
multiple motor neurons and fibers within a single fascicle.
all of the muscle fibers within a single muscle.
blood vessels.
Sarcopenia is a condition that occurs in muscle tissue with aging. As a person ages, their muscle tissue
decreases due to osteoclast activity.
decreases due to the muscle's need for greater energy.
increases due to an increased amount of actin in the muscle fiber.
increases due to increased blood flow to the muscles.
decreases overall, leading to a decrease in strength.
As skeletal muscles enlarge in a weight lifter, all of the following occur except
Increase in muscle cell replication.
Increase in myofilaments.
Increase in sarcomeres.
Increase in myofibrils.
Increase in contractile proteins.
Identify the state of this muscle
partially contracted
fully contracted muscle
contracting muscle
sarcomere
fully relaxed
Identify this type of motion (a)
Which of the following are examples of smooth muscle? (select all that apply)
muscles of the intestines
diaphgram
biceps brachii
myocardium
muscles of the walls of blood vessles
voluntary muscles
triceps brachii
Identify the structure labeled H (a)
