Cell Transport

In the human kidney urea from the blood is filtered through the glomerular membrane into a nephron. The movement of the urea across the membrane occurs without an Input of energy which factor is most likely the reason urea absorption does not require energy

A concentration gradient

Which is a difference between active and passive transport

Active transport requires ATP, while passive transport does not.

Which describes how the plasma membrane helps to maintain homeostasis

By regulating the contents of the cell from the external and internal environments

A lipid bilayer allows certain molecules to pass through And blocks other molecules which structure is most often protected by a lipid bilayer

Cell

What structures surrounds the cell and regulates materials that enter and leave the cell

Cell membrane

Which part of the sale controls the movement of the substances

Cell membrane

Which factor affects osmosis through a membrane

Concentration of water on both sides of the membrane and permeability of the membrane

Many plants tend to Wilt on a hot sunny day the most likely cause of this wilting is

Dehydration

Why do cells shrink

Higher salute concentration outside the cell then inside

A man is exercising on a treadmill as his speed increases the capillaries located near the surface of his skin more than double in diameter why is this increase and capillaries size most beneficial to the human body

It allows for the loss of heat to cool the body

A thin potato slice is placed into a container of salt water for 10 minutes which best describes what will happen to the potato slice

It will become soft

An animal cell is placed into distilled water which best describes what will happen to the animal cell

It will increase in size until it ruptures

Which statement best explains what happens to a leaf when it has lost much needed water

It's turgor pressure decreases

How are the transported molecules moved in active transport

Molecules are pumped against their concentration gradient using energy

A muscle cell absorbs the water needs without using energy which process is the sale used to take in water

Osmosis

Which of these processes makes it possible for these cells to take in water

Osmosis

Which component of the cell membrane functions to actively transport molecules into the cell

Protein

A cell that is low and water will most likely immediately lose the ability to

Remain rigid

What is one way the body reacts to cold weather

Shivering

Which best illustrates active transport

Sodium ions are pumped from a region of lower concentration to a region of higher concentration in the nerve cells of a human

Cell membranes regulate which substance can enter and exit the cell

Student 3

A cell Is placed in a highly concentrated salt solution what will most likely happen to the cell if left in the solution

The cell will shrink in size, losing water due to osmosis.

Which best signals that equalLibrium has been reached across a selectively permeable membrane

The movement Of water a cross the membrane is balanced

An animal cell with a concentration of 7% Dissolve sugars salts and other substances is placed in a cup containing a 15% sugar solution. What would assume that most likely observe after 30 minutes

Water molecules will move out of the cell causing it to shrivel

A student noticed that placing wilted lettuce in a bowl of cool water caused the lettuce to become more crisp and firm What is the best explanation for his observation

Water moved into the lettuce cells by osmosis

A cell is placed into a salt solution The salt concentration is greater in the solution and inside the cell Which best describes what will most likely happen

Water will flow out of the cell by passive transport

Elodea Is a freshwater plant most commonly used in freshwater aquariums if Elodia plants were placed in a saltwater aquarium which osmotic process will most likely occur

Water will leave the planet and enter the aquarium

The concentration of solutes Differ on the two sides of the cell membrane That are permeable only to water which describes the movement of materials across the cell membrane

Water will move by osmosis

What is the end result of diffusion across a cells membrane

equal concentrations of the solute on both the inside and outside of the cell

What will happen to a cell that is placed in a hypotonic saline solution

water will enter the cell causing it to swell