BIOLOGY VOL. II
16th Edition
ISBN: 9781308795317
Author: Raven
Publisher: Mcgraw-Hill/Create
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 9, Problem 2A
The ion Ca2+ can act as a second messenger because it is
a. produced by the enzyme calcium synthase.
b. normally at a high level in the cytoplasm.
c. normally at a low level in the cytoplasm.
d. stored in the cytoplasm.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Which of these statements about ion movement through the plasmamembrane is true?a. Movement of Na+ out of the cell requires energy (ATP).b. When Ca2+binds to proteins in ion channels, the diffusion of Na+into the cell is inhibited.c. Specific ion channels regulate the diffusion of Na+ through theplasma membrane.d. All of these are true
Molecule X binds to a receptor that works as an ion channel. Which of the following must betrue of this receptor?A. It allows passage of only one type of ion.B. It is found in the cytosol of the cell.C. It is voltage dependent.D. It is slow to produce a response in the cell.
GABA receptors play an essential role in neurotransmission in the central nervous system. In response to the
appropriate signal, these receptors open up and allow CI (chloride ions) to flow into the cell. Given this information,
GABA receptors can be classified as a
A. gated ion channel
B. carrier protein
O C. symporter
D. enzyme
Chapter 9 Solutions
BIOLOGY VOL. II
Ch. 9 - Paracrine signaling is characterized by ligands...Ch. 9 - Signal transduction pathways a. are necessary for...Ch. 9 - The function of a ____is to add phosphates to...Ch. 9 - Which of the following receptor types is NOT a...Ch. 9 - How does the function of an intracellular receptor...Ch. 9 - Signaling through receptor tyrosine kinases often...Ch. 9 - Prob. 7UCh. 9 - Which of the following best describes the...Ch. 9 - Prob. 1ACh. 9 - The ion Ca2+ can act as a second messenger because...
Ch. 9 - Different receptors can have the same effect on a...Ch. 9 - In comparing small G proteins like Ras and GPCR...Ch. 9 - Prob. 5ACh. 9 - The receptors for steroid hormones and peptide...Ch. 9 - Describe the common features found in all examples...Ch. 9 - The sheet of cells that form the gut epithelium...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- choose one: a. Steroids are hormones processed by their target cells at the plasma membrane b. Steroids are hormones which are able to be dissolved in water c. Steroids are made from cholesterol a type of fat d. Steroids do not use nuclear receptorsarrow_forwardOne is true about smooth endoplasmic reticulum A. It lacks ribosomes B. It is site of Ca2+ sequestration C. It is involved in detoxification of organic molecules D. It is th site of steroid hormone synthesizes E. It is the site of protein synthesisarrow_forwardA mutation where Protein kinase A and Ca2+/calmodulin kinase 2 is inhibited a. Increased Cytosolic Calcium b. Decreased Cytosolic Calcium c. No change in Cytosolic Calcium d. Slow progressive decrease in cytosolic calciumarrow_forward
- Cell membranes can maintain a difference in electrical charge between the inte- rior of the cell and the extracellular fluid. What is this charge difference called? A. excitability B. the membrane potential C. the action potential D. the sodium-potassium pumparrow_forwardDynein uses ATP to A. propel axoneme arms together B. undergoes conformational changes that moves across microtubules in the minus end C. Moves across microtubules in a directional manner D. converts ATP to ADP to undergo head region changesarrow_forwardGlucose can be transported into cells with a glucose/sodium symporter. If the extracellular concentration of sodium is always in excess to that of glucose, which of these manipulations would MOST increase the rate of glucose transport into a cell? A. increase in the extracellular concentration of sodium B. increase in the intracellular concentration of sodium C. increase in the extracellular concentration of glucose D. increase in the intracellular concentration of glucosearrow_forward
- Receptors located within the cell are mostly A. Protein B. Glucoprotein C. Glucose D. Chitin D. Nonearrow_forwardA rise in the intracellular Ca2+ concentration causes muscle cells to contract. in addition to an ATP- driven Ca2+ pump, muscle cells that contract quickly and regularly, such as those of the heart, have an additional type of Ca2+ pump—an antiport that exchanges Ca2+ for extracellular Na+ across the plasma membrane. The majority of the Ca2+ ions that have entered the cell during contraction are rapidly pumped back out of the cell by this antiport, thus allowing the cell to relax. ouabain and digitalis are used for treating patients with heart disease because they make heart muscle cells contract more strongly. both drugs function by partially inhibiting the Na+ pump in the plasma membrane of these cells. can you propose an explanation for the effects of the drugs in the patients? What will happen if too much of either drug is taken?arrow_forwardWhich of the following occurs once the lipid-soluble hormone diffuses across the plasma membrane into the cytoplasm? Identify the most correct answer. O The hormone binds directly to the DNA in the nucleus. O The hormone binds to its specific receptor in the plasma membrane. O The hormone binds to its specific receptor and another receptor binds forming a dimer. O The hormone binds to another transport protein in the cytoplasm. Save for Later 80 F5 F6 F7 Attempts: 0 of 3 used F8 F9 Submit Answer F10arrow_forward
- Which of these statements about carrier-mediated facilitated diffusion is true? a. It uses cellular ATP. b. It is used for cellular uptake of blood glucose. c. It is a form of active transport. d. None of these are true.arrow_forwardWhich of the following statements about potency is correct? O A. Committed progenitors have more potency than totipotent stem cells. B. Multipotent stem cells have higher potency than pluripotent stem cells. C. Unipotent stem cells are different from normal somatic cells because they can self-renew. D. Adult tissues have many totipotent stem cells in their niche.arrow_forwardWhich of the following Ca++ ion channels removes calcium ions from the cytoplasm of the cell? 1. voltage-gated Ca++ channels 2. Na+/Ca++ active transport pumps 3. Ca++ uniporter 4. Na+/Ca++ exchanger Group of answer choices (A) 1 and 2 (B) 1, 2, and 3 (C) 2 and 4 (D) 2, 3, and 4 (E) 3 and 4arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Human Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning
Human Physiology: From Cells to Systems (MindTap ...
Biology
ISBN:9781285866932
Author:Lauralee Sherwood
Publisher:Cengage Learning
What is Metabolism?; Author: Stated Clearly;https://www.youtube.com/watch?v=nRq6N5NGD1U;License: Standard youtube license