Exam 5: Membranes and an Introduction to Signal Transduction

Proteins that bind molecules and elicit a cellular response are called _____.

A molecule that often functions as a second messenger is ______.

With respect to polarity, membrane lipids can be described as ______.

The _____ receptor is a receptor tyrosine kinase.

In an $\alpha$ helical protein that spans a cell membrane, _____ would likely be in the center of the membrane, _____ would likely be associated with the polar head groups, and _____ would likely be associated with the aqueous environment.

The movement of glucose into a cell when blood sugar is high is accomplished by _____. The movement of K⁺ against its concentration gradient is accomplished by _____.

Which of the following statements describes integral membrane proteins?

Ligand binding to a receptor tyrosine kinase causes _____ of the receptor, which then _____ the next protein in the signaling pathway.

Which of the following is true regarding membrane asymmetry?

Regions of a membrane that contain tightly packed cholesterol and sphingolipids are called _____ and are thought to be important to _____.

The most notable difference between _____ and other membrane lipids is its planar nature.

The second messenger _____ is produced by the enzyme _____.

______ are amphipathic molecules that constitute the major lipid components of the cell membrane.