Skip to content
View in the app

A better way to browse. Learn more.
allnurses

A full-screen app on your home screen with push notifications, badges and more.

To install this app on iOS and iPadOS
  1. Tap the Share icon in Safari
  2. Scroll the menu and tap Add to Home Screen.
  3. Tap Add in the top-right corner.
To install this app on Android
  1. Tap the 3-dot menu (⋮) in the top-right corner of the browser.
  2. Tap Add to Home screen or Install app.
  3. Confirm by tapping Install.
Discussion

Homework question

This question is on my homework and I have narrowed it down to 2 choice but I am not sure which one is right. Can someone help me please?!?!!?

One type of experimental contraceptive device is a skin patch that contains a chemical absorbed through the skin. Which of the following substances might be the type of chemical involved?

A. proteins

B. water-soluble substances

C. lipid-soluble substances

D carbohydrates

I have it narrowed down to B or C

:uhoh3::confused:

  • Quote

    • Featured Replies

    The chemical in the patch should be a lipid-soluble substance. A two-prong purpose for this: 1) contracepetives usually are synthetic hormones, which are derived from cholesterol (lipid-soluble); and 2) for effective delivery of the drug into the cell membrane to effect hormone signal pathways.

    The main reason for this is that for it get absorbed transdermally, it needs to penetrate the cell membrane, right?

    Remember that the membrane structure is comprised of phospholipid bilayer (with polar/hydrophilic heads and nonpolar/hydrophobic tails). It also has cholesterol embedded within the bilayer to give further structural support and fluidity at the same time (a nice dual purpose).

    Hope this helps.

    www.ncbi.nlm.nih.gov/books/NBK9898/

    www.wisc-online.com/Objects/ViewObject.aspx?ID=AP1101

  • Quote

    It's not B - Water-soluble compounds will not absorb through the lipid bilayer membranes of the skin cells.

  • Quote

    • Join the conversation

    You can post now and register later. If you have an account, sign in now to post with your account.

    Guest
    Add a Comment
    Go to topic listing

    Currently Reading 0

    • No registered users viewing this page.

    Account

    Navigation

    Search

    Search

    Configure browser push notifications
    Chrome (Android)
    1. Tap the lock icon next to the address bar.
    2. Tap Permissions → Notifications.
    3. Adjust your preference.
    Chrome (Desktop)
    1. Click the padlock icon in the address bar.
    2. Select Site settings.
    3. Find Notifications and adjust your preference.