3/14/2023 Living Environment Homework #8: Cell Signaling

The three stages of cell signalling are

• paracrine, local, and synaptic
• reception, transduction, and response
• transcription, translation, and folding
• alpha, beta, and gamma

A cell is known to respond to a particular signaling molecule. Which of the following must be true of this cell?

• It is in the heart muscle
• it is also the site of production for the signaling molecule
• It contains the receptor for the signaling molecule
• It is incapable of signal transduction

A signal molecule that binds to a plasma-membrane protein is a

• ligand
• second messenger
• protein kinase
• receptor protein

What is a molecule that allows signal molecules to bind?

• Receptor

• Ligand

• Enzyme

• Substrate

What is the first step of signal transduction?

• response

• reception

• transduction

• transcription

Cells carry out the chemical activities of the body

• True

• False

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-6

Which structure controls the activities of the cell?

• Brain

• Nucleus

• Mitochondria

• Plasma membrane

Tags

NGSS.MS-LS1-2

Which organelle provides storage of food, water, and nutrients?

• cell membrane

• mitochondria

• vacuume

• vacuole

Tags

NGSS.MS-LS1-2

An important structure in human cells that separates the internal environment from the external environment

• cytoskeleton

• cell wall

• plasma (cell) membrane

• centrioles

The cell membrane allows only certain materials to move into and out of the cell. What term describes this ability?

• Permeable

• Selectively Palatable

• Semi-permeable

• Semi-Photosynthetic