Bio Unit 2/lecture 13

Front 1

Which statement about the renin-angiotensin-aldosterone system (RAAS) is NOT correct?

Back 1

If excessive Na+ is excreted, blood pressure and body fluid volume increase

Front 2

The metabolic rate of an endotherm ______ at low environmental temperatures while the metabolic rate of an ectotherm ________ at low environmental temperatures.

Back 2

rises; falls

Front 3

The nonselective movement of water and a number of solutes into excretory system tubules is

Back 3

filtration

Front 4

Suppose that the osmotic response element is in a promoter joined to the coding region of luciferase, and this composite gene is in cultured renal medulla cells. The cells should glow when they are placed in a medium that is _______ to the cells.

Back 4

hyperosmotic

Front 5

Which of the following excretory tubule segments in mammals consumes the most ATP?

Back 5

ascending segment of the loop of Henle

*ATP-Ascending

Front 6

Which of the following statements is NOT correct?

Back 6

all of the choices are correct

Front 7

Osmolarity is the outcome of the

Back 7

total solute concentration in a solution

Front 8

Most marine invertebrates are osmoconformers, therefore:

Back 8

the cells of these animals do not shrink or swell bc the osmolarity of their cells and extracellular fluids is the same as seawater

Front 9

In which of the following excretory tubule segments in mammals does about 65 percent of the water from the filtrate get reabsorbed?

Back 9

proximal convoluted tubule

*SiXty-proXimal

Front 10

Molecules and ions reabsorbed from the nephron reenter the blood at the

Back 10

peritubular capillaries

Front 11

Which of the following is an adaptation that allows kangaroo rats to produce urine that is 20 times more concentrated than body fluids?

Back 11

a longer loop of Henle in the nephron

Front 12

Suppose that you have a cell with a membrane that is permeable to water but not to Na+ or Cl- or any other solute. There is more NaCl outside the cell than inside the cell, and the osmolarity of the cell is higher than that of the solution surrounding the cell. Which of the following should occur?

Back 12

Overall, the cell should take up water

Front 13

The urine of marine mammals is ______ when compared to ________.

Back 13

hyperosmotic; seawater

Front 14

Sharks and rays deal with the osmotic stress of living in seawater mainly by

Back 14

maintaining high levels of urea and trimethylamine oxide in body fluids

Front 15

The selective movement of specific small molecules and ions into excretory system tubules is

Back 15

secretion

*Selective-Specific-Secretion

Front 16

What is the effect of antidiuretic hormone (ADH) on the kidney?

Back 16

ADH increases water absorption in the kidneys

Front 17

Where are the osmoreceptors that trigger the release of ADH?

Back 17

hypothalamus

Front 18

The movement of some molecules and ions out of the excretory system tubules and back into body fluids is

Back 18

reabsorption

*out and back

Front 19

In which of the following excretory tubule segments in mammals does essentially all of the glucose and amino acids from the filtrate get reabsorbed?

Back 19

proximal convoluted tubule

*remember bc 65% of the water gets reabsorbed here

Front 20

Which of the following, produced from a blood protein as part of the chain of events in response to a significant drop in blood pressure, quickly raises blood pressure by constricting many arterioles?

Back 20

angiotensin

*think angio=small/constrict (angioplasty)