Questions and CORRECT Answers
Each muscle fiber is surrounded by a connective tissue called? - CORRECT ANSWER -
Endomysium
What is released from the sarcoplasmic reticulum into the myofibril, causing tension
development in a muscle? - CORRECT ANSWER - Calcium ions that bind to troponin
What type of muscular contraction occurs in the pectoralis major during the slow, controlled,
downward phase of a bench press? - CORRECT ANSWER - eccentric
What is the thick structural protein inside the sarcomere? - CORRECT ANSWER -
Myosin
A muscle fiber that is small in diameter has a slow contraction speed, and a high capillary
density would be classified as? - CORRECT ANSWER - Type 1
Through which of the following valves does blood flow after contraction of the right atrium? -
CORRECT ANSWER - tricuspid valve
During a typical electrocardiogram, atrial depolarization is represented by? - CORRECT
ANSWER - P-Wave
While reading an ECG, electrical potential that depolarizes the ventricles is represented by? -
CORRECT ANSWER - The QRS complex
What blood vessel functions to exchange oxygen, fluid, nutrients, electrolytes, hormones, and
other substances between the blood and the interstitial fluid in the various tissues of
the body? - CORRECT ANSWER - capillaries
, Where are normal rhythmic electrical impulses initiated in the heart? - CORRECT
ANSWER - The SA node
When performing a biceps curl, tension in the biceps brachii muscle increases. Which of the
following structures detects and responds to the tension by reflexively reducing muscle
activation? - CORRECT ANSWER - Golgi tendon organ
An athlete training for a marathon would benefit from having a high concentration of which
muscle fiber type? - CORRECT ANSWER - type 1
A college football player decides to add 30 minutes of intense stationary cycling every other day
to his current resistance training program. Which of the following best describes the effect the
stationary cycling will have on his performance? - CORRECT ANSWER - strength gains
will be compromised
Which of the following represents the correct transmission of the heart's electrical impulse? -
CORRECT ANSWER - SA node, AV node, AV bundle, Purkinje fibers
Which of the following represents a muscle of expiration? - CORRECT ANSWER -
internal intercostals
Identify the correct path in which inhaled air is distributed to the lungs. - CORRECT
ANSWER - a. Trachea, Bronchi, Bronchioles, Alveoli
Heavy resistance exercise has what effect on cardiac output? - CORRECT ANSWER -
increases rapidly
what is the value of a metabolic equivalent? (MET) - CORRECT ANSWER - 3.5 ml of
oxygen per kilogram of body weight per minute