/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 19 Use the following KEY to answer:... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 1: Problem 19

Use the following KEY to answer: a. 1, 2, and 3 are correct b. 1 and 3 are correct c. 2 and 4 are correct d. only 4 is correct e. all are correct Which of the following describes one or more property of the hormone aldosterone?: 1 . acts on the distal tubule 2\. changes distal tubule water permeability 3\. acts on \(\mathrm{Na}^{+} / \mathrm{K}^{+}\left(\mathrm{H}^{+}\right)\) pump 4\. cannot be affected by certain diuretics

Short Answer

Expert verified
b. 1 and 3 are correct.

Step by step solution

01

Understanding the Properties of Aldosterone

Aldosterone is a hormone that plays a critical role in regulating sodium and potassium levels in the body. It acts primarily on the renal tubules.
02

Identify aldosterone鈥檚 action on the distal tubule

Aldosterone increases the reabsorption of sodium and the excretion of potassium in the distal tubule. Thus, statement 1 is correct.
03

Analyze the effect on water permeability

Aldosterone primarily affects sodium reabsorption and does not have a direct effect on water permeability in the distal tubule. Thus, statement 2 is incorrect.
04

Explore the action on \text{Na\(^{+}\)/K\(^{+}\)(H\(^{+}\))} pumps

Aldosterone stimulates the production and function of \text{Na\(^{+}\)/K\(^{+}\)(H\(^{+}\))} pumps in the renal tubules, facilitating the exchange of sodium and potassium. Thus, statement 3 is correct.
05

Assess whether aldosterone can be affected by diuretics

Certain diuretics can affect the action of aldosterone by interfering with the renal tubules' function, so statement 4 is incorrect.
06

Select the correct answer based on the analysis

Based on the correct statements (1 and 3), the answer aligning with these is b. Thus, option b (1 and 3 are correct) is correct.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Renal Tubules
Renal tubules play a pivotal role in the kidney's ability to process blood and form urine. They consist of several segments, each serving a unique function in filtering and reabsorbing substances. Primarily, the tubules help in:
  • Maintaining electrolyte balance
  • Controlling blood pressure
  • Regulating fluid volumes
Aldosterone acts on these tubules, especially the distal tubule, impacting how sodium and potassium are managed. Understanding the function of renal tubules is essential to grasping how aldosterone manipulates these processes.
Sodium Reabsorption
Sodium reabsorption is crucial for maintaining fluid and electrolyte balance. Aldosterone increases sodium reabsorption in the distal tubule of the kidney. Here's what happens:
  • Aldosterone binds to receptors in the cells of the distal tubule.
  • This binding prompts the activation of specific genes that produce proteins involved in sodium transport.
  • As a result, more sodium is reabsorbed from the urine back into the blood.
This process is vital for regulating blood pressure and blood volume.
Na+/K+ Pump
The Na+/K+ pump is an integral membrane protein vital for maintaining cellular homeostasis. It moves sodium out of cells and potassium into cells, essential for:
  • Generating electrical gradients across cell membranes
  • Regulating cellular volume
  • Maintaining proper function of muscles and nerves
Aldosterone stimulates this pump in the renal tubules, leading to increased sodium reabsorption and potassium excretion. A deep understanding of the Na+/K+ pump showcases how hormonal regulation can influence renal function and overall electrolyte stability.
Diuretics Effect
Diuretics are medications that increase urine output. They often target different parts of the renal tubules to prevent reabsorption of sodium and water. There are several classes of diuretics, including:
  • Thiazides
  • Loop diuretics
  • Potassium-sparing diuretics
Some diuretics affect aldosterone's action by blocking its receptors or influencing the Na+/K+ pump. Understanding how diuretics interact with aldosterone can help appreciate how these medications manage conditions like hypertension and edema.

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

A healthy individual may occasionally have __ RBC/high powered field in a random urine specimen: a. zero b. 2-4 c. 8-10 d. 15-25 e. 25-30

Which of the following regarding the steroid synthetic pathway is not correct? a. cholesterol is converted to pregnenolone b. 11 deoxycortisol is converted to cortisol c. pregnenolone is converted to progesterone d. androstenedione is converted to testosterone e. 17 hydroxyprogesterone is converted to aldosterone

Use the following key to answer. a. 1,2, and 3 are correct b. 1 and 3 are correct c. 2 and 4 are correct d. only 4 is correct e. all are correct Which of the following can act as neurotransmitters? 1\. acetylcholine 2\. gamma-amino-butyric acid 3\. dopamine 4\. norepinephrine

Use the following Key to answer Questions 20-27: a. 1, 2, and 3 are correct b. 1 and 3 are correct c. 2 and 4 are correct d. 4 only is correct e. all are correct An advantage of kinetic methods of measuring enzyme activity is that: 1\. temperature is not critical 2\. pH is not critical 3\. there is elimination of the lag phase 4\. linearity is demonstrable

Use the following Key to answer Questions 2-16. a. 1, 2, and 3 are correct b. 1 and 3 are correct c. 2 and 4 are correct d. 4 only is correct e. all are correct Therapeutic drug monitoring is usually NOT performed when: 1\. blood level is not related directly to clinical response 2\. liver impairment is present and the patient is on drugs eliminated by hepatic metabolism 3\. clinical or pharmacological response is easily and accurately measured 4\. the drug is used as a prophylactic
See all solutions

Recommended explanations on Biology Textbooks

Genetic Information

Read Explanation

Heredity

Read Explanation

Control of Gene Expression

Read Explanation

Biological Processes

Read Explanation

Ecosystems

Read Explanation

Cell Communication

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.