Week4-HW Chapter 7 pt-1 PDF

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BIO 181: Chapter 7-Membrane Components Chapter 7-part 1 1. A membrane that allows some substances to pass through while excluding others is: Plasma membrane 2. The spreading of molecules or ions from regions of higher concentration to lower is: Diffusion 3. The movement of waste substances from the blood into the kidney tubules is due to the process called: Filtration 4. Movement of sodium ions from regions of lower concentration inside the cell to one of higher concentration outside the cell can only be by the process of: Active Transport 5. Tiny droplets of liquid can pass through a cell membrane by the process of: Pinocytosis 6. Large particles are engulfed and taken into the cell by the process of: Phagocytosis 7. The substance acted upon by an enzyme is called its: Substrate 8. The main reservoirs of glycogen are cells of the : Liver and: Muscle 9. The end resulting substance of cellular respiration is: 10. Most aerobic metabolism occurs in the: Mitochondria

Part 2 1. Label the structures of the plasma membrane in the diagram below.

Hydrophilic head

Transmembrane Protein

Hydrophobic tail

Peripheral Protein

Integral Protein

2. The plasma membrane, according to the fluid mosaic model is composed mainly of ______phospholipids_____________ and proteins. 3. Each phospholipid molecule consists of two parts: 

A polar head that is (hydrophobic/hydrophilic).



A pair of non-polar tails that are (hydrophobic/hydrophilic).

4. In plasma membranes, phospholipids arrange themselves into a bilayer. 

The polar heads of the bilayer face ___outside_________________.



The non-polar tails of the bilayer face ____inside________________.

5. ____Phospholipids____ is lipid soluble and aids in stability, and flexibility of the plasma membrane.

6. There are various different types of transport proteins: 

_____Channel_____ protein: the protein that forms a channel of a pore



_____Carrier_____ protein: the protein that bind molecules and change shape to shuttle them across the membrane.



_______Channel_______ : protein that transports water across the membrane



Proteins found in the plasma membrane that have carbohydrates covalently attached are called ______Glycoproteins__________.



Lipids found in the plasma membrane that have carbohydrates covalently attached are called ________Glycolipids_________. BIO 181: Chapter 7: Transport

1. Complete the table by checking the correct column for each statement:

Statement

Hypotonic Solution

High solute concentration inside the cell. Solute concentration is the same inside and outside the cell. Solute concentration is higher outside the cell Results in Osmosis

Isotonic Solution

Hypertonic Solution

X

X X x

x

x

2. Plant cells have specific vocabulary terms depending on the tonicity of the solution. List those terms below. Hypotonic :_______Turgid_____________ Isotonic :_____Flaccid_______________ Hypertonic :_____Plasmolyzed_______________ 3. Match the term with its correct description: a. b. c. d.

ATP (cellular energy) Facilitated diffusion Endocytosis Passive transport

e. f. g. h.

Active transport Exocytosis Carrier protein Channel protein

__H___ Transport protein that provides a tube-like opening in the plasma membrane through which particles can diffuse __A___Is used during active transport but not passive transport

___C__ Process by which a cell takes in material by forming a vacuole around it __D___ Particle movement from an area of higher concentration to an area of lower concentration ___F__ Process by which a cell expels waste from a vacuole ___B__A form of passive transport that uses transport proteins ___E__ Particle movement from an area of lower concentration to an area of higher concentration ___G__ Transport protein that changes shapes when a particle binds with it

Match the term with its correct description: a. Transport protein b. Active transport c. Diffusion

d. Passive transport e. Osmosis f. Endocytosis

g. Exocytosis h. Equilibrium

__E___ The diffusion of water through a cell membrane __D___ The movement of substances through the cell membrane without the use of cellular energy __G___ Used to help substances enter or exit the cell membrane __B___ When energy is required to move materials through a cell membrane ___C__ When the molecules of one substance are spread evenly throughout another substance to be balanced __F___ A vacuole membrane fuses (becomes a part of) the cell membrane and the contents are released inside the cell....