Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 41, Problem 8RQ
The osmolarity of body fluids is maintained at ___________ .
- 100 mOsm
- 300 mOsm
- 1000 mOsm
- it is not constantly maintained
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The channels through which water moves across plasma membranes arecalled ________________.
Chapter 41 Solutions
Biology 2e
Ch. 41 - Figure 41.5 Which of the following statements...Ch. 41 - Figure 41.6 Which of the following statements...Ch. 41 - Figure 41.8 Loop diuretics are drugs sometimes...Ch. 41 - When a dehydrated human patient needs to be given...Ch. 41 - The sodium ion is at the highest concentration in:...Ch. 41 - Cells in a hypertonic solution tend to: shrink due...Ch. 41 - The macula densa is/are: present in the renal...Ch. 41 - The osmolarity of body fluids is maintained at...Ch. 41 - The gland located at the top of the kidney is the...Ch. 41 - Active transport of K+ in Malpighian tubules...
Ch. 41 - Contractile vacuoles in microorganisms:...Ch. 41 - Flame cells are primitive excretory organs found...Ch. 41 - BUN is. blood urea nitrogen blood uric acid...Ch. 41 - Human beings accumulate ____before____ excreting...Ch. 41 - Renin is made by. granular cells of the...Ch. 41 - Patients with Addison's disease retain water...Ch. 41 - Which hormone elicits the 'fight or flight”...Ch. 41 - Why is excretion important in order to achieve...Ch. 41 - Why do electrolyte ions move across membranes by...Ch. 41 - Why are the loop of Henle and vasa recta important...Ch. 41 - Describe the structure of the kidney.Ch. 41 - Why might specialized organs have evolved for...Ch. 41 - Explain two different excretory systems other than...Ch. 41 - In terms of evolution, why might the urea cycle...Ch. 41 - Compare and contrast the formation of urea and...Ch. 41 - Describe how hormones regulate blood pressure,...Ch. 41 - How does the renin-angiotensin-aldosterone...
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- Blood plasma osmolarity is higher than intracellular fluid osmolarity. TRUE or FALSEarrow_forwardTrue or false the cell membrane equalizes osmosis pressure to protect cell.arrow_forwardAn ion gate in the plasma membrane that opens or closes when a chemical binds to it is called a/an ____________ .arrow_forward
- _____ ions are relatively impermeable to the cell membrane, they are let into the cell by gated channels (channel mediated facilitated diffusion).arrow_forwardWhen a person becomes dehydrated, the amount of water in extracellular fluids such as blood decreases, causing the solute concentration of these fluids to increase. State whether osmosis results in water entering or leaving cells.arrow_forwardIntracellular fluid _____________ includes fluid outside the cells includes fluid inside body cells has the same concentration as the extracellular fluid includes the interstitial fluid all the abovearrow_forward
- Tight junctions prevent the diffusion of fluids and solutes between______________arrow_forwardEach functional stucture in the body contributes its share to the maintenance of more or less stable extracellular fluid which is called .arrow_forwardThe movement of water through a semipermeable membrane from a region of lower solute concentration to a region of higher solute concnetration is called _________ osmosis diffusion solubility gradientarrow_forward
- Active transport is ____________ movement of water down concentration gradient using a protein channel movement of materials against their concentration gradient movement of one substance against, and one substance down their concentration gradients movement of molecules from high concentration to low concentration using no protein channels movement of materials down their concentration gradient using a protein channelarrow_forwardFusion of a secretory vesicle with the plasma membrane and release of the vesicle’s contents is a process called___________________ .arrow_forwardOsmometric neurons fire ________ when you don’t have a lot of water in your body compared to when you are well hydrated. More Less The same amountarrow_forward
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