Question

Complete the following questions. A phospholipid has a head and two tails. The tails are found a. at the surfaces of the membrane. b. in the interior of the membrane. c. spanning the membrane. d. where the environment is hydrophobic. e. Both b and d are correct.

Name: Problem 12, Chapter 3: Human Biology
Uploaded: 2022-03-25T18:33:50-08:00
Duration: 2 min 13 s
Channel: Khalida Dawar
Description: Complete the following questions. A phospholipid has a head and two tails. The tails are found a. at the surfaces of the membrane. b. in the interior of the membrane. c. spanning the membrane. d. where the environment is hydrophobic. e. Both b and d are correct.

   Complete the following questions.
A phospholipid has a head and two tails. The tails are found
a. at the surfaces of the membrane.
b. in the interior of the membrane.
c. spanning the membrane.
d. where the environment is hydrophobic.
e. Both b and d are correct.

Human Biology

Sylvia S. Mader,… 12th Edition

Chapter 3, Problem 12

Instant Answer

Solved by Expert Khalida Dawar

03/25/2022

Step 1

The head is hydrophilic, meaning it is attracted to water, and is therefore found on the surface of the membrane. Show more…

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Complete the following questions. A phospholipid has a head and two tails. The tails are found a. at the surfaces of the membrane. b. in the interior of the membrane. c. spanning the membrane. d. where the environment is hydrophobic. e. Both b and d are correct.

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Key Concepts

Hydrophobic Interactions

Hydrophobic interactions refer to the tendency of nonpolar substances—like the fatty acid tails of phospholipids—to avoid contact with water. These interactions drive the tails to sequester themselves in the interior of the membrane, contributing to the membrane's overall structure and selective permeability.

Phospholipid Structure

Phospholipids are molecules that consist of a hydrophilic (water-attracting) head and two hydrophobic (water-repelling) tails. This amphipathic nature is fundamental in the formation and function of biological membranes.

Cell Membrane Bilayer Formation

In an aqueous environment, phospholipids spontaneously organize into a bilayer where the hydrophilic heads face outward toward the water, and the hydrophobic tails congregate inward, away from water. This arrangement creates a stable barrier that is essential for cell integrity.

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