SCI 335 Week 15 Quiz 2

SCI 335  Week 15 Quiz 2 | Wilmington University

 

Question 1

The primary regulator of water intake is the mechanism of _____ .

 

Question 2

Water balance and electrolyte balance are interdependent due to

·         electrolytes being dissolved in water. 

·         both being compounds that form ions in blood. 

·         water dissolving in electrolytes.  

·         both being in an ionic state in the blood.

 

Question 3

The thirst center is located in the  

·         medulla oblongata.  

·         midbrain. 

·         hypothalamus. 

·         thalamus.

 

Question 4

A person in a moderate environment probably would lose the greatest amount of water by means of  

·         urine. 

·         insensible perspiration.  

·         sweating.  

·         feces.

 

Question 5

During the act of drinking water, the desire for water is usually inhibited by

·         distension of the stomach.  

·         changes in extracellular fluid concentration. 

·         hormones secreted by stomach cells. 

·         changes in intracellular fluid concentration.

 

Question 6

The thirst center in the hypothalamus is stimulated by _____ of the extracellular fluid, and is inhibited by _____ .  

·         a decrease in the osmotic pressure; stimulation of osmoreceptors  

·         an increase in the osmotic pressure; distension of the stomach by water  

·         a decrease in sodium ions; an increase in sodium ions 

·         nerve impulses from the cerebrum; nerve impulses from the thalamus

 

Question 7

The concentration of calcium ions in extracellular fluid is regulated primarily by a hormone secreted by the _____ _____ .

·         parathyroid glands

·         parathyroid glands

 

Question 8

The hormone aldosterone functions to promote the  

·         secretion of sodium. 

·         secretion of calcium. 

·         reabsorption of potassium. 

·         reabsorption of sodium.

 

Question 9

Acid-base buffer systems minimize pH changes by  

·         converting weak acids to strong acids.    

·         converting strong acids to weak acids.  

·         causing the breathing rate to increase.  

·         promoting the excretion of hydrogen ions.

 

Question 10

Obstruction of the airways leads to 

·         respiratory alkalosis.

·         metabolic alkalosis.    

·         respiratory acidosis. 

·         metabolic acidosis.

 

 

Question 11

Ingestion of excessive amounts of sodium bicarbonate to relieve the symptoms of indigestion may lead to  

·         metabolic acidosis.   

·         metabolic alkalosis. 

·         respiratory alkalosis. 

·         respiratory acidosis.

 

Question 12

Prolonged vomiting, in which only the stomach contents are lost, leads to  

·         respiratory alkalosis.  

·         metabolic acidosis.  

·         respiratory acidosis.   

·         metabolic alkalosis.

 

Question 13

Hyperventilation leads to  

·         respiratory alkalosis.  

·         metabolic alkalosis.  

·         respiratory acidosis.  

·         metabolic acidosis.

 

Question 14

The respiratory center is most likely to cause an increase in the breathing rate if the  

·         concentration of carbonic acid is decreasing.  

·         concentration of sodium bicarbonate is increasing. 

·         pH of body fluids is decreasing. 

·         pH of body fluids is increasing.

 

Question 15

The phosphate buffer system consists of  

·         sodium dihydrogen phosphate and sodium bicarbonate.  

·         sodium chloride and sodium monohydrogen phosphate.    

·         sodium monohydrogen phosphate and sodium dihydrogen phosphate.  

·         hydrochloric acid and sodium monohydrogen phosphate.