cell membrane and cells

The main purpose of active and passive transport of chemicals across the cell membrane is to maintain which characteristics of living things? a. reproduction b. growth c. homeostasis d. diffusion

c. homeostasis

Which of the following statements best describes the difference between active and passive transport? a. Active transport requires proteins, while passive transport needs cholesterol. b. Passive transport requires an input of energy, while active transport does not. c. Passive transport requires proteins, while active transport does not. d. Active transport requires an input of energy, while passive transport does not.

d. Active transport requires an input of energy, while passive transport does not.

The cell on the left is a ... and the cell on the right is a ... aProkaryote: eukaryote B. Plant Cell: Bacteria c Animal Cell: Plant Cell d. Animal Cell: Bacteria

d. Animal Cell: Bacteria

In normal lung cells there are several proteins that aid in the movement of CI-ions out of lung cells and into the airway. In individuals with Cystic Fibrosis one or more of these proteins is damaged - depending on the severity of Cystic Fibrosis. Movement of CI-is followed by water, to keep the airways moist. Analyze these images. Which of the following is a true statement about the movement of Chlorine ions? a. Chlorine ions cross the membrane into the airway via exocytosis. b. Chlorine ions cross the membrane into the airway via active transport. c. Chlorine ions cross the membrane into the airway via osmosis. d. Chlorine ions cross the membrane into the airway via facilitated diffusion

d. Chlorine ions cross the membrane into the airway via facilitated diffusion

In a lab experiment, students fill four semi-permeable bags with 0.2M sucrose solution. They put each bag int beaker containing different concentrations of sucrose. The bag is impermeable to sucrose. Which bag will show the greatest increase in mass over the course of 30 minutes? a. The bag in beaker A b. The bag in beaker B c. The bag in beaker C d. The bag in beaker D

d. The bag in beaker D

Comparing two cells from the same plant, you notice that the root cells have similar organelles to the lei the root cells do not have a. a nucleus b. cytoplasm c. a cell wall d. chloroplasts

d. chloroplasts

Nerve cells create a concentration gradient of ions along their cell membrane. This allows them to "charged" signals from one location of the body to another. What type of transport do the nerve cells use to maintain a concentration gradient of ions? a. Active Transport b. Facilitated Diffusion c. Osmosis d. Endocytosis and Exocytosis

a. Active Transport

How does this cell maintain the concentration of each molecule we see? (Select one true statement for each a. Chlorine (CI) is actively transported into the cell b. Chlorine (CT is actively transported out of the cell C chionne (Cy uses facilitated diffusion to cross the cell membrane d. Sodium (Na) is actively transported into the cell e Sodium Na) is actively transported out of the cell f. sodium uses facilitated diffusion to cross the cell membrane g. magnesium is actively transported into the cell h. magnesium is actively transported out of the cell i. magnesium uses facilitated diffusion to cross the cell membrane

a. Chlorine (CI) is actively transported into the cell e. Sodium Na) is actively transported out of the cell i. magnesium uses facilitated diffusion to cross the cell membrane

Which statement/s describes the particles based on the time-lapse photography? (Select all that apply) a. The particles are nonpolar. b. The particles are polar. c. The particles are proteins. d. The particles need a protein channel to cross the cell membrane. e. The particles do not need energy to move across the cell membrane. f. The particles use energy to move across the cell membrane.

a. The particles are nonpolar. e. The particles do not need energy to move across the cell membrane.

This diagram shows various molecules crossing the membrane. Be sure to look at the concentration of molecules as well as the arrow direction. Match the item on the right (A,B,C) with the correct molecules. 1. Option A - ATP Pump 2. Option B - Protein Channel Ep 3. Option C - Phospholipids

b. Na* c. Glucose a. 0.02

Which structures are correctly matched to the function in the cell membrane? (Select all that apply), a. Cholesterol molecule - allows nonpolar molecules to pass through the cell membrane b. Proteins - allows polar molecules to pass through the cell membrane c. Phospholipid bilayer - provides a barrier which prevents some items from crossing the cell membrane

b. Proteins - allows polar molecules to pass through the cell membrane c. Phospholipid bilayer - provides a barrier which prevents some items from crossing the cell membrane

A red blood cell is placed in an aqueous solution (a solution of water). The red blood cell contai concentration of protein and sugar than the aqueous solution. What will most likely occur? a. Protein and sugar from the aqueous solution will diffuse into the red blood cell. b. Water from the red blood cell will diffuse into the aqueous solution. c. Water from the aqueous solution will diffuse into the red blood cell. d. Protein and sugar from the red blood cell will diffuse into the aqueous solution.

b. Water from the red blood cell will diffuse into the aqueous solution.

endocytosis and exocytosis are examples of... a. osmosis b. active transport c. passive transport d bacteriolysis

b. active transport

Which statements are true about the cells above? a. bacteria b. plant c. animal d. solution is hypertonic e. solution is hypotonic f. solution is isotonic

b. plant d. solution is hypertonic

Which type of cells do not have supportive cell walls outside the cell membrane? a. Bacteria Cells b. Plant Cells c. Animal Cells

c. Animal Cells

Analyze the microscope slide image above. This organism could best be described as a.. a. prokaryotic, plant b. prokaryotic, bacteria c. eukaryotic, plant d. eukaryotic, animal

c. eukaryotic, plant

The mad scientist, Dr. Jekyll, has created a new poison in his lab. The goal of this poison is to prevent t oxygen use for making energy. The function of which cell structure would be affected by this poison? a. vacuole b. ribosomes c. chloroplasts d. mitochondria

d. mitochondrial