Anatomy And Physiology Practice Test Flashcards
6 cards from real ATI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Anatomy And Physiology Practice Test flashcards as text
Which electrolyte is most critical for cardiac muscle contraction and maintaining normal heart rhythm?
Answer: Potassium
Potassium is essential for cardiac muscle function, and abnormal levels (hypokalemia or hyperkalemia) can cause life-threatening arrhythmias.
The sinoatrial (SA) node is located in which chamber of the heart?
Answer: Right atrium
The SA node, the heart's natural pacemaker, is located in the upper wall of the right atrium near the entrance of the superior vena cava.
Which type of muscle tissue is found in the walls of blood vessels and the gastrointestinal tract?
Answer: Smooth muscle
Smooth muscle is involuntary, non-striated muscle found in the walls of hollow organs including blood vessels, the GI tract, bladder, and uterus.
Which organ produces bile and is responsible for detoxification of drugs and alcohol?
Answer: Liver
The liver produces bile for fat digestion and serves as the body's primary detoxification organ, metabolizing drugs, alcohol, and toxins.
Gas exchange between the blood and body tissues occurs at which level of the vascular system?
Answer: Capillaries
Capillaries are the smallest blood vessels with walls only one cell thick, allowing gas, nutrient, and waste exchange between blood and tissues.
Which structure in the nephron is primarily responsible for the reabsorption of water, glucose, and amino acids from the filtrate?
Answer: Proximal convoluted tubule
The proximal convoluted tubule reabsorbs approximately 65% of filtered water, virtually all glucose and amino acids, and most sodium and bicarbonate.