Muscular System

Anatomy & Physiology: Muscular System

Multiple Choice

All of the following are types of muscles EXCEPT:

• Isometric

• Smooth

• Cardiac

• Skeletal

Multiple Choice

All of the following are characteristics of muscles EXCEPT:

• Muscle cells are elongated and known as fibers

• Muscle contraction is caused by microfilaments within the muscle fibers

• All muscles share common terminology, such as myo, mys, and or sarco.

• Muscles are responsible for only the voluntary movements of the body. Neurons control involuntary function.

Multiple Choice

True or False: Epimysium is found surrounding the entire muscle.

• True

• False

Multiple Choice

True or False: Endomysium is the protective covering (fascia) that surrounds a fascicle

• True

• False

Multiple Choice

True or False: Tendons and Ligaments are the same thing.

• True

• False

​Copy the links below and paste them in your browser to review Muscle Micro-anatomy & Physiology

https://www.youtube.com/watch?v=SCznFaTwTPE​

​&

​https://www.youtube.com/watch?v=nTZnBdeIb5c

Poll

When actin and myosin filaments slide past one another in the sliding filament theory, do the filaments shorten?

• Myosin shortens, but actin stays the same length

• Actin shortens but myosin stays the same length

• Both microfilaments shorten as the muscle fiber contracts

• Neither microfilament shortens. Instead, the sarcomere shortens as the actin & myosin slide past each other.

Copy & paste the link below into your browser to review how neurons stimulate muscle contraction.​

https://www.youtube.com/watch?v=qTt_2oPI2kk​

Open Ended

Explain in your own words how the recruitment of motor neurons controls how strong a muscular response is.

Multiple Choice

Where does the energy for muscle contraction come normally from?

• ATP produced by cellular respiration

• ATP produced by glycolysis

• ATP produced by anaerobic respiration

• ATP from the direct phosphorylation of enzymes in the Krebs Cycle.

Open Ended

Explain in 3 sentences or less the difference between Isotonic and Isometric muscle contractions. (Use your own words!)

Open Ended

Describe the exercise movements of a complete "Jumping Jack" using the correct anatomical terms for muscle movement.