BISC 101 Lecture Notes - Lecture 7: Cotransporter, Starch, Chemiosmosis

35 views2 pages

emeraldfrog636

30 Jan 2018

School

Simon Fraser University

Department

Biological Sciences

Course

BISC 101

Professor

Tony Williams

For unlimited access to Class Notes, a Class+ subscription is required.

Document Summary

Plant transport = water + nutrients - > xylem. Long distance transport occurs via bulk flow transport. The rate of transcription is regulated by stomata ( and their guard cells) - sugars are transported from sources to sinks via the phloem. Water moves from areas of high water potential to low water potential due to a solute concentration gradient = osmosis and the pressure exerted to water. Transpiration- pulls water up the stem or tree in xylem = - negative pressure. Water movement in plants is based on water potential. Water ows from areas of high to low water potential. Solute potential is the tendency of water to move by osmosis in response to differences in solute concentrations. In isotonic solution solute concentrations are at equilibrium, in hypotonic solution, water moves into cell by osmosis. When plants take up water the plasma membrane pushes against the cell wall but the elastic, semi-rigid cell wall pushes back.

Related Questions

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

BISC 101 Lecture Notes - Lecture 7: Cotransporter, Starch, Chemiosmosis

Document Summary

Get access

Related Documents

BISC 101 Lecture Notes - Lecture 10: Xylem, Water Potential, Pericycle

BISC 101 Lecture Notes - Lecture 8: Sieve Tube Element, Water Potential, Phloem

BISC 101 Lecture Notes - Lecture 10: Xylem, Water Potential, Symplast

Related Questions