Study "HAP RENAL HARD", a flashcard deck on FORKSAI.
Which statement best describes the main role of the kidneys? A. Regulate body temperature B. Produce digestive enzymes C. Maintain fluid volume and composition of the body D. Store urine
C. Maintain fluid volume and composition of the body. The kidneys are major regulators of the internal environment, playing a vital role in maintaining fluid volume and composition in the body.
Approximately what percentage of cardiac output goes to the kidneys? A. 5% B. 10% C. 25% D. 50%
C. 25%. The renal arteries, directly linked to the aorta, supply the kidneys with blood, accounting for 25% of cardiac output.
The functional unit of the kidney is the: A. Neuron B. Nephron C. Lobule D. Corpuscle
B. Nephron. The kidneys are composed of nephrons, which are the functional units responsible for filtering blood, performing selective reabsorption, and excreting waste products.
What process involves water and small molecules moving out of the glomerulus under pressure? A. Tubular secretion B. Tubular reabsorption C. Active Transport D. Glomerular filtration
D. Glomerular filtration. Blood enters the glomerulus under pressure, forcing part of the blood plasma, including water and small molecules, through the glomerular membrane.
The descending limb of the Loop of Henle is: A. Permeable to solutes but not water B. Permeable to water but relatively impermeable to solutes C. Impermeable to both solutes and water D. Freely permeable to proteins
B. Permeable to water but relatively impermeable to solutes. This characteristic is crucial for the concentration of urine as water leaves the tubule while solutes are largely retained.
What feature allows the bladder to expand when filling? A. Elastic cartilage B. Transitional epithelium and rugae C. Smooth muscle only D. Skeletal muscle fibres
B. Transitional epithelium and rugae. The bladder is lined with a mucous membrane of transitional epithelium and, when empty, has numerous folds called rugae, which allow for significant expansion.
Which of the following is NOT a layer of the glomerular filtration barrier? A. Fenestrated capillary endothelium B. Basement membrane C. Podocyte slit pores D. Renal fascia
D. Renal fascia. The renal fascia is an external layer of the kidney, while the fenestrated capillary endothelium, basement membrane, and podocyte slit pores constitute the glomerular filtration barrier.
Which substance is typically blocked from passing through the glomerular filtration barrier? A. Glucose B. Urea C. Large proteins (e.g., albumin) D. Sodium
C. Large proteins (e.g., albumin). The glomerular filtration barrier is designed to block large proteins and blood cells, while allowing water, glucose, amino acids, and various ions to pass through.
The Bowman's capsule is located at the top of each nephron, specifically in which part of the kidney? A. Renal medulla B. Renal pelvis C. Renal cortex D. Ureter
C. Renal cortex. The Bowman's capsule, containing the glomerulus, is situated in the cortex at the top of each nephron.
What is the primary purpose of tubular secretion in the kidneys? A. To conserve useful substances like glucose and amino acids B. To move substances from the blood into the kidney tubule for elimination C. To concentrate urine by reabsorbing water D. To filter blood cells and large proteins from plasma
B. To move substances from the blood into the kidney tubule for elimination. Tubular secretion actively removes unwanted materials, such as hydrogen ions, potassium ions, drugs, and toxins, from the blood into the filtrate.