BISC 104Lxg Lecture Notes - Lecture 4: Endoplasmic Reticulum, Nuclear Membrane, Cell Membrane

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ochrewalrus569

1 Feb 2017

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All cells arise from pre-existing ells through cell division, and differentiate into many specialized cells with particular functions. Cells contain hereditary material, which they pass to another cell during cell division. The chemical composition of all cells is quite similar. The metabolic processes associated with life occur within cells. The average human body is made of 37 trillion cells and 200 different types. Barrier called plasma membrane - plant cells and bacteria have a cell wall next to their plasma membrane. Area where the cell"s genetic material is stored - nucleus in animal and plant cells, nucleoid in bacterial cells. Fluid called cytosol - found between plasma membrane and nucleus, filled with organelles, each with a function vital to the life of the cell. Contains almost all of the genetic information of the cell, dna. Surrounded by nuclear envelope, a double membrane that allows communication through nuclear pores.

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1,Match the descriptions to the type of transport.

- A. B. C.	Water enters a cell because it is hypertonic compared to the extracellular environment, increasing its turgor pressure
- A. B. C.	Water enters guard cells because the guard cells are hypertonic compared to the surrounding cells
- A. B. C.	Potassium ions are pumped into guard cells
- A. B. C.	The motor cells of a Venus fly trap are hypotonic compared to surrounding cells, causing water to leave the motor cells
- A. B. C.	Sugar is loaded into the phloem

A.	Both active and passive transport
B.	Passive Transport
C.	Active transport

2,Describe what is wrong with the following statement and explain why:

All prokaryotic and eukaryotic cells contain plasma membrane, nucleus, ribosomes, organelles, cytoplasm, and cell walls.

What is short-distance transport?

	a,	The movement of solutes from a region of low concentration to a region of high concentration
		b,The movement of water, nutrients, and other substances between cells
c,		The movement of substances from a region of high concentration to a region of low concentration
d,		The movement of water across a semipermeable membrane from a region of low solute concentration to a region of high solute concentration.

What terms describe the movement of water across a semipermeable membrane from a region of high water concentration towards a region of low water concentration (and high solute concentration.)

What is found in the proptoplasm?

Cell wall, cytoplasm, plasma membrane, nucleus, and other cell organelles

Plasmodesmata, cell wall, and plasma membrane

Cell wall, cytoplasm, and plasma membrane

Cytoplasm, nucleus, and other cell organelles

The channels that allow nutrients and protoplasm to pass between plant cells are called _________________.

What happens when a plant cell is placed in a hypotonic solution?

Water will enter the plant cell and the plasma membrane will swell and cell lysis will occur

Water will leave the plant cell and the plasma membrane will pull away from the cell and plasmolysis will occur

Water will enter the plant cell and the plasma membrane will swell and push against the cell wall

Water will leave the plant cell and the plant cell will lose turgor pressure, causing the plant to wilt

________________ transport uses cellular energy.

What molecules make plasma cell membranes hydrophilic on the outside and hydrophobic on the inside?

What type of cells do plants have?

		Bacterial
		Archaeic
		Eukaryotic
		Prokaryotic

Please match the following:

Nucleus, cytoplasm, plasma membrane, ribosome, rough endoplasmicreticulum, smooth endoplasmic reticulum, golgi apparatus, vesicles,lysosomes, central vacuole, mitochondrion, chloroplast, cell wall,cytoskeleton, gap junction, tight junction, plasmodesmata

A. Structure between cells that forms leak proof sheet
B. Stacks of membrane sacs that receive and modify protein productscoming from the rER
C. Fluid-Filled space between the plasma membrane and the nuclearmembrane where organelles are suspended
D. Supports cell, maintains cell shape, acts as tracks fororganelle movement
E. Cellular respiration, bulk of ATP production
F. Outer border of plant cells
G. Storage, digestion, maintains, turgor pressure in plants
H. Genetic control center, directs cellular activites
I. Selective barrier of all cells
J. Converts solar energy to chemical energy
K. Structure that allows substances to flow from one cell toanother cell
L. protein factory
M. digestive compartment in animal cells
N. synthesis, modification, and packaging of proteins
O. transport shuttle buses
P. stacks of tubules where carbohydrate and lipid areproduced
Q. Channels connecting neighboring plant cells

harlequinmoose866

NEED HELP FAST!Please write 2 pargragh for each question!

Describe the fluid mosaic model of the plasma membrane and explain how membranes manage to stay fluid with temperature changes. Be sure to explain what the plasma membrane is composed of. How are the sides of a membrane different?

What are membrane proteins and how many types are there? What are their functions?

Define osmosis, diffusion and active transport. Compare and contrast the three. Explain the subtle differences between them. What are the forms of bulk transport in cells?

Starting from the nucleus, work your way all the way out to the ECM and explain each cell organelle IN DETAIL, with labeled diagrams, and their functions. Be sure to include the cytoskeleton and be sure to differentiate between plant and animal cells. (WORTH DOUBLE POINTS)

burgundylion306

BISC 104Lxg Lecture Notes - Lecture 4: Endoplasmic Reticulum, Nuclear Membrane, Cell Membrane

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