Muscles and Cardiovascular System Anatomy Quiz

Play an AI-generated podcast conversation about this lesson

Which pathway regenerates ATP the fastest in muscle cells?

Direct phosphorylation of ADP by creatine phosphate (correct)

Anaerobic glycolysis

Formation of lactic acid

Aerobic pathway

How many ATP molecules are produced per molecule of creatine phosphate in muscle cells?

1 (correct)

2

32

None

Which process uses oxygen and occurs in the mitochondria to produce about 32 ATP?

Direct phosphorylation of ADP by creatine phosphate

Anaerobic glycolysis

Formation of lactic acid

Aerobic respiration (correct)

What is the end product of anaerobic glycolysis before it is converted to lactic acid?

Pyruvic acid Signup and view all the answers

Which suspected factors contribute to muscle fatigue?

Ion imbalances: Ca2+, K+ Signup and view all the answers

What type of muscle contraction involves constant tension while the muscle changes length?

Isotonic contractions Signup and view all the answers

What is the main function of the cardiovascular system?

Transport oxygen to and from cells Signup and view all the answers

Where is the heart located in the human body?

In the thoracic cavity, between the lungs Signup and view all the answers

Which of the following is a chamber of the heart?

Atria Signup and view all the answers

What is the orientation of the apex of the heart?

Towards the left hip Signup and view all the answers

Which layer of the heart is known as the endothelium?

Endocardium Signup and view all the answers

What fills the space between the layers of pericardium in the heart?

Serous fluid Signup and view all the answers

What type of contraction occurs when muscle filaments are able to slide past each other?

Isotonic contraction Signup and view all the answers

Which type of exercise results in stronger, more flexible muscles with greater resistance to fatigue?

Isometric exercise Signup and view all the answers

What is the result of continuous partial contractions due to different motor units being stimulated systematically?

Muscle tone Signup and view all the answers

Which group of muscles is NOT mentioned in the provided text?

Quadriceps Signup and view all the answers

What happens during an isometric contraction?

Muscles shorten and movement occurs Signup and view all the answers

How does resistance (isometric) exercise affect body metabolism according to the text?

Makes body metabolism more efficient Signup and view all the answers

What anchors the cusps of AV valves to the walls of the ventricles?

Chordae tendineae Signup and view all the answers

During heart relaxation, what happens to the semilunar valves?

They are closed Signup and view all the answers

Which vessels supply the heart muscle with oxygenated blood?

Coronary arteries Signup and view all the answers

How does cardiac muscle contract in terms of nerve impulses?

Spontaneously and independently of nerve impulses Signup and view all the answers

What controls the beating rate of atrial and ventricular cells?

Intrinsic conduction system (nodal system) Signup and view all the answers

What is the function of the coronary sinus in cardiac circulation?

Receives blood from cardiac veins and empties into the right atrium Signup and view all the answers

What is the main function of the intrinsic conduction system in the heart?

Sets the heart rhythm Signup and view all the answers

Where is the sinoatrial (SA) node located?

In the right atrium Signup and view all the answers

Which node is responsible for briefly delaying the impulse in the heart's conduction system?

Atrioventricular (AV) node Signup and view all the answers

What is tachycardia?

Rapid heart rate, over 100 beats per minute Signup and view all the answers

What is bradycardia?

Slow heart rate, less than 60 beats per minute Signup and view all the answers

During which phase of the cardiac cycle do both atria and ventricles contract and then relax?

Diastole Signup and view all the answers