D103 clicker+questions_lecture+16-18

D103 clicker+questions_lecture+16-18 - A. expression level...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
iClicker question #1 Which of the following statements is FALSE? 1) Signal transduction is essential for cells to maintain normal development and  homeostasis. 2) Extracellular signal can only be transduced by cell surface membrane  receptors. 3) Small and hydrophobic stimuli such as steroids can directly penetrate plasma  membrane, while hydrophilic stimuli can not penetrate plasma membrane  directly. 4) None of the above.    Ans: 2 Lecture 16
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Iclicker question #2 Which type of signaling best describes hormone signaling? A. Contact-dependent signaling B. Autocrine signaling C. Endocrine signaling D. Synaptic signaling E. Paracine signaling Lecture 16 Ans: C
Background image of page 2
iClicker question #1  Which of the following mechanisms can not terminate the  intracellular signaling pathway? A. sequestering receptors by internalization B. Inhibition of a negative feedback loop C. deactivation of a signal transduction protein D. degradation of receptors  E. none of the above Lecture 17 Ans: B
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Which has no direct effect on regulation of cellular PKA activity?
Background image of page 4
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 6
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: A. expression level of AKAPs B. level of adenylyl cyclase activity C. increased cytosolic concentration of cAMP D. decreased cytosolic concentration of ADP E. level of cAMP phosphodiesterase activity iClicker question #2 Lecture 17 Ans: D Which of the following is not involved in regulation of cAMP concentration? A. Gs -coupled receptor B. AKAPs C. Gi -coupled receptor D. modulation of cAMP phosphodiesterase activity E. activity of guanylyl cyclase Iclicker question #1 Lecture 18 Ans: E Which of the following steps determines the inactivation of activated G-proteins? A. When the GPCR releases its ligand. B. When the alpha subunit has exchanged GDP for GTP C. When the activated subunits have inhibited their target ion channel receptor. D. Hydrolysis of bound GTP E. None of the above. Iclicker question #2 Lceture 18 Ans: D...
View Full Document

Page1 / 6

D103 clicker+questions_lecture+16-18 - A. expression level...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online