Anchor 4 Homeostasis & Transport

Amino acids, sugars, and ions move across the cell membrane. Their movement from a region of high concentration to a region of low concentration is accomplished by special proteins in the membrane.

Which of the following terms applies to this type of cell transport?

• active transport

• facilitated diffusion

• osmosis

• transcription

The diagram shows the basic structure of a cell's plasma membrane. What is the primary function of lipid molecules in the plasma membrane?

• to provide an energy source for most cell activities

• to provide a substrate for enzyme activity in the cell

• to provide a place to collect and store waste products within the cell

• to provide a barrier to the movement of substances in and out of the cell

Tags

NGSS.MS-LS1-2

What directly supplies the energy needed to actively transport sodium ions across the plasma membrane of a cell?

• ATP

• DNA

• enzymes

• lipids

Which of the following is an example of active transport?

• chromosomes migrating during cell division

• water diffusing throughout the cytoplasm of a cell

• cilia moving rapidly to propel a single-celled organism through water

• proteins moving ions from low to high concentration across a cell membrane

Which of the following is the best example of the human body maintaining homeostasis?

• The heart beats using cardiac muscle.

• The breathing rate increases during exercise.

• The nose and ears contain cartilage for flexibility.

• The digestive system uses enzymes to break down food.

Tags

NGSS.HS-LS1-3

A plant cell prefers a(n) ____________ environment, while an animal cell prefers a(n) ___________ environment.

• hypertonic, isotonic

• isotonic, hypotonic

• hypotonic, isotonic

• hypotonic, hypertonic

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-3

Look at the laboratory setup. What would this laboratory setup most likely be used demonstrate?

• carbohydrate synthesis

• active transport

• diffusion

• dehydration

A protein on the surface of influenza viruses can attach to proteins on the surface of healthy human cells as shown in the model. What term describes the attachment sites on the surface of the cells?

• receptor molecules

• genetic codes

• molecular bases

• inorganic catalysts

Which example is an activity that a fish most likely uses to maintain homeostasis within its body?

• using camouflage to avoid predators

• exchanging gases through its gills to regulate oxygen levels

• feeding at night to regulate body temperature

• moving to deeper water to regulate metabolic wastes

Tags

NGSS.HS-LS1-3

The rough endoplasmic reticulum and Golgi apparatus work together in eukaryotic cells. What is one way that the rough endoplasmic reticulum assists the Golgi apparatus?

• It assembles nucleic acids from monomers.

• It breaks down old, damaged macromolecules.

• It packages new protein molecules into vesicles.

• It determines which protein molecules to synthesize.