WHAT IS LIFE? A GUIDE TO BIO 3E+LAUNCHPA
3rd Edition
ISBN: 9781319103316
Author: PHELAN
Publisher: Macmillan Higher Education
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Chapter 20, Problem 7MC
Summary Introduction
Introduction:
The cells of a multicellular organism are not in direct contact with the external environment, hence cellular processes are not straightforward and simple.
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which of the following statements are true about homeostasis? Select all that apply.
a. The selective permeability of the cell membrane allows for thermoregulation.
b. Homeostasis is an organism‘s way of maintaining constant and balanced internal processes.
c. Ectotherms rely on environmental heat to maintain homeostasis.
d. Homeostasis works by a system of positive feedback.
Match the following cellular features and activities with the properties of cells.
Cell structure is highly complex and organized structurally.
Cell posseses genetic information.
Cells engage in metabolism.
Cells sense and respond to changes in the environment.
A.
Mistakes in the genetic material are called mutation.
B.
Protein receptors on cell membranes receive specific ligands that "communicate" the presence of a simulus or stimuli.
C.
Cells contain "blueprints" for constructing cellular structures, for rrunning cellular activities and for making more of themselves.
D.
All living systems are capable of doing "work" in whatever form.
E.
Cell…
Which of the following statements about cellular membranes is/are FALSE?
A. Only lipids move Within the membrane, while the proteins are anchored and immobile.
B. Membranes are composed of lipids and proteins.
C. Substances may be transported across membranes by active transport, facilitated transport or diffusion.
D. Membrane proteins are classified as integral or peripheral, upon their function
Chapter 20 Solutions
WHAT IS LIFE? A GUIDE TO BIO 3E+LAUNCHPA
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- Functions of human body cells include a. movement. b. covering. c. storage. d. communication. e. All of the choices are correct.arrow_forwardBelow are three statements - two of which are truths and one is a lie. Which of the following statements is a lie? a. Rough ER and smooth ER mainly function for protein synthesis. b. There are two types of secretory activities of a cell. c. A cell that makes steroid hormones has a high concentration of smooth endoplasmic reticulum.arrow_forwardPlasma membranes are selectively permeable. This means: A. cholesterol cannot enter B. anything can pass in and out C.the membrane regulates the passage of the material in and out of the cell D. glucose cannot enter the cellarrow_forward
- Which of the following is the smallest living structural unit of the body? A. atom B. molecule C. organelle D cellarrow_forwardThe cell is the basic unit of all living things. Some organisms like Amoeba and bacteria are only one cell. Viruses are sub-cellular. Plants and animals are multicellular. Analyze how this fact is important when considering how different organism feed, respire, and excrete. Give two examples for each characteristic and use a multi- cellular organism and a uni-cellular (one-celled) organism to compare.arrow_forwardMark the following statements as true or false. If a statement is false, correct it to make a true statement. a. Structure and function are closely related at the organ level only. b. Homeostasis is the condition of having a dynamic equilibrium of the internal environment. c. Positive feedback loops are triggered by a deviation from a homeostatic set point and are shut down when conditions return to the set point. d. The effects of negative feedback loops are amplified to create an escalating response. e. Cell-cell communication is required to coordinate the activities of the whole bodyarrow_forward
- Hypertrophy, hyperplasia and increases in extracellular material are forms of A. growth B. reproduction C. development D. metabolism E. movement F. cellular composition G. responsiveness H. organizationarrow_forwardWhich of the following is a way that the body determines how much of a certain chemical, protein, enzyme, or response is needed to maintain homeostasis? A. Resource limitation, B. Feedback inhibition, C. Kickback inhibition, D. Signal looparrow_forwardWhich of the following statements describes the function of plasma membranes? I. define the boundaries of the cell and its organelles and act as permeability barriers II. sites for specific biological and chemical functions III. possess transport proteins that regulate the movement of substances into and out of the cell and its organelles IV. contain protein molecules that act as receptors to detect external signals V. provide mechanisms for cell-to-cell contact, adhesion, and communication A. I and III B. I, III, IV C. I, III, IV, V D. I, II, III, IV, Varrow_forward
- Regulating transport of substances in and out of the cell is the a. cell membrane. b. nuclear membrane. c. cytoplasm. d. nucleus.arrow_forwardWhich of the following correctly lists the levels of organization from least complex to most complexarrow_forwardFollowing is a list of tissues that have specialized functions and demonstrate corresponding specialization of subcellular structure. Match the tissue with the letter of the cell structures and organelles listed to the right that would be abundant in these cells. Tissues -Enzyme (protein)-secreting cells of the pancreas -Insect flight muscles -Cells lining the respiatory passages -White blood cells that engulf and destroy invading bacteria -Leaf cells of cacti Cell Structures and Organelles: a. plasma membrane b. mitochondria c. Golgi apparatus d. chloroplast e. endoplasmic reticulum f. cilia and flagella g. vacuole h. ribosome i. lysosomearrow_forward
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What is Homeostasis? | Physiology | Biology | FuseSchool; Author: FuseSchool - Global Education;https://www.youtube.com/watch?v=quQr6X1Q58I;License: CC-BY