Introduction:
The body’s water content is regulated so that the total volume of water in the body remains constant. Thus, the volume of water taken into the body is equal to the volume lost each day.

Answer to Problem 1RAC
The correct answer is an option (a). The levels of angiotensin II increase.
Explanation of Solution
Explanation/justification for the correct answer:
Option (a). The levels of angiotensin II increase. The juxtaglomerular apparatus stimulates the sensation of thirst by responding to lower blood pressure by releasing renin. Renin than stimulate the formation of angiotensin ii, which leads to the secretion of aldosterone. Aldosterone increase vasoconstriction. That complete process stimulates the sensation of thirst. So, the correct answer is an option (a).
Explanation for incorrect answer:
Option (b). The osmolality of the blood decreases. It is an incorrect option because an increase in extracellular fluid or blood osmolality leads to a sensation of thirst. It is detected by the specialized cells in the supraoptic nucleus that initiates neural circuit activity.
Option (c). Blood pressure increases. This is a wrong statement because a decrease in blood pressure stimulates the sensation of thirst. It is detected by the baroreceptors, which send the action potential to the brain through a sensory neuron.
Option (d). Renin secretion decreases. The decrease in blood pressure does not stimulate the thirst sensation. The decrease in renin secretion also decreases the formation of angiotensin and aldosterone, which is responsible for thirst sensation. So, this is an incorrect answer.
Want to see more full solutions like this?
Chapter 27 Solutions
SEELEY'S ANATOMY+PHYSIOLOGY
- the direct output from molecular replacement is a coordinate file showing the orientation of the unknown target protein in the unit cell. true or false?arrow_forwardDid your intake of vitamin C meet or come very close to the recommended amount? yes noarrow_forwardWhich of the following statements about hydration is true? Absence of thirst is a reliable indication that an individual is adequately hydrated. All of these statements are true. Although a popular way to monitor hydration status, weighing yourself before and after intensive physical activity is not a reliable method to monitor hydration. Urine that is the color of apple juice indicates dehydration. I don't know yetarrow_forward
- Three of the many recessive mutations in Drosophila melanogaster that affect body color, wing shape, or bristle morphology are black (b) body versus grey in wild type, dumpy (dp), obliquely truncated wings versus long wings in the male, and hooked (hk) bristles versus not hooked in the wild type. From a cross of a dumpy female with a black and hooked male, all of the F1 were wild type for all three of the characters. The testcross of an F1 female with a dumpy, black, hooked male gave the following results: Trait Number of individuals Wild type 169 Black 19 Black, hooked 301 Dumpy, hooked 21 Hooked, dumpy, black 172 Dumpy, black 6 Dumpy 305 Hooked 8 Determine the order of the genes and the mapping distance between genes. Determine the coefficient of confidence for the portion of the chromosome involved in the cross. How much interference takes place in the cross?arrow_forwardWhat happens to a microbes membrane at colder temperature?arrow_forwardGenes at loci f, m, and w are linked, but their order is unknown. The F1 heterozygotes from a cross of FFMMWW x ffmmww are test crossed. The most frequent phenotypes in the test cross progeny will be FMW and fmw regardless of what the gene order turns out to be. What classes of testcross progeny (phenotypes) would be least frequent if locus m is in the middle? What classes would be least frequent if locus f is in the middle? What classes would be least frequent if locus w is in the middle?arrow_forward
- 1. In the following illustration of a phospholipid... (Chemistry Primer and Video 2-2, 2-3 and 2-5) a. Label which chains contain saturated fatty acids and non-saturated fatty acids. b. Label all the areas where the following bonds could form with other molecules which are not shown. i. Hydrogen bonds ii. Ionic Bonds iii. Hydrophobic Interactions 12-6 HICIH HICIH HICHH HICHH HICIH OHHHHHHHHHHHHHHHHH C-C-C-C-C-c-c-c-c-c-c-c-c-c-c-c-C-C-H HH H H H H H H H H H H H H H H H H H HO H-C-O H-C-O- O O-P-O-C-H H T HICIH HICIH HICIH HICIH HHHHHHH HICIH HICIH HICIH 0=C HIC -C-C-C-C-C-C-C-C-CC-C-C-C-C-C-C-C-C-H HHHHHHHHH IIIIIIII HHHHHHHH (e-osbiv)arrow_forwardAnswer this as a dental assistant studentarrow_forwardbuatkan judul skripsi tentang parasitologi yang sedang trendinharrow_forward
- Dental assistantarrow_forwardO Macmillan Learning Glu-His-Trp-Ser-Gly-Leu-Arg-Pro-Gly The pKa values for the peptide's side chains, terminal amino groups, and carboxyl groups are provided in the table. Amino acid Amino pKa Carboxyl pKa Side-chain pKa glutamate 9.60 2.34 histidine 9.17 1.82 4.25 6.00 tryptophan 9.39 2.38 serine 9.15 2.21 glycine 9.60 2.34 leucine 9.60 2.36 arginine 9.04 2.17 12.48 proline 10.96 1.99 Calculate the net charge of the molecule at pH 3. net charge at pH 3: Calculate the net charge of the molecule at pH 8. net charge at pH 8: Calculate the net charge of the molecule at pH 11. net charge at pH 11: Estimate the isoelectric point (pl) for this peptide. pl:arrow_forwardBiology Questionarrow_forward
- Biology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage LearningHuman Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning
- Biology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage Learning



