202 Exam 4
Which of the following is true about inulin?
All inulin filtered by the glomerulus remains in the renal tubule and appears in the urine
Which of the following occurs during the gastric phase of gastric secretion?
All of these take place in the gastric phase.
In the parietal cells, the enzyme carbonic anhydrase causes a reaction between ______ and ________.
CO2 and H2O
Which of the following inhibits the secretion of the gastric glands?
Duodenal pH of less than two
Inulin is freely filtered by the justaglomerular apparatus
False
T/F: As long as there is chyme in the duodenum it will continue to stimulate gastric secretion
False
T/F: Once a substance is seperated from the blood supply by the nephron it is always secreted in the Urine.
False
T/F: The carbonic acid ion is joined to a hydrogen ion by the enzyme carbonic anhydrase.
False
T/F: The medulla oblongata controls gastric secretion by utilizing the parasympathetic branch of the nervous system and the endocrine system.
False
Which of the following hormones does not inhibit gastric gland secretions?
Gastrin
Secretin is released from the duodenum in response to ?
HCL in the chyme
Which of the following enzymes is produced by the stomach?
Pepsin
Which of the following does not stimulate the secretion of HCL in the stomach?
Secretin
If a patient presents with a Streptococcus viridans infection, his doctor may prescribe oral penicillin taken four times daily. Why does he have to take the penicillin so often?
The renal tubule extracts penicillin from the blood and secrete it into the urine
Which of the following does not enter into the calculation for renal clearance?
The volume of the blood filtered
Renal clearance is the volume of blood plasma from which a particular waste is completely removed in one minute
True
T/F: Cholecystokinin, which is produced in the small intestine, inhibits gastric secretions in the stomach.
True
T/F: Distention of the stomach activates a direct stimulatory effect on the gastric glands.
True
T/F: Gastrin functions to increase the production of HCL in the stomach
True
T/F: In the parietal cell, carbonic acid dissociates into a bicarbonate ion and a hydrogen ion.
True
T/F: Secretin is released from the duodenum in response to acidic chyme.
True
Which of the following describes secretion?
When blood fluids leave the glomerulus and enter the glomerular capsule
Which of the following describes reabsorption?
When substances from the filtrate passes from the nephron tubules back to the peritubular capillaries
Which of the following describes secretion?
When substances pass from the peritubular capillaries to the nephron tubules
Ion exchange molecules in the plasma membrane of the parietal cells exchange __________ ions going out for __________ ions coming in.
bicarbonate; chloride
Gastric secretion begins during the __________ phase and ends during the __________ phase.
cephalic; intestinal
The process of separating wastes from the body fluids ad eliminating them is called?
excretion
The hormone __________ stimulates the secretion of the enzyme __________ in the stomach.
gastrin; pepsinogen
Hydrochloric acid is formed when __________.
hydrogen ions and chloride ions join in the duct of the gastric gland
The units for renal clearance are:
ml/min
Stimulation from the __________ nervous system via the __________ nerve causes the secretion of HCl in the stomach.
parasympathetic; vagus