The video explores how cells communicate to maintain homeostasis, using signaling molecules and receptors. It explains signal transduction pathways and cellular responses, providing examples like hormone signaling in platypuses. Different types of signaling, such as autocrine, paracrine, and endocrine, are discussed, along with amplification processes. The video concludes with a preview of the next topic on cellular energy.

What is the term used to describe the state of constant physical and chemical balance in our bodies?

• Equilibrium

• Homeostasis

• Metabolism

• Osmosis

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NGSS.HS-LS1-3

Which molecule is known for controlling sleep cycles?

• Adrenaline

• Cortisol

• Melatonin

• Insulin

Which hormone is associated with the fight-or-flight response?

• Insulin

• Cortisol

• Estrogen

• Adrenaline

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NGSS.HS-LS1-3

What is required for a cell to respond to a signaling molecule?

• An ion channel

• A lipid bilayer

• A DNA sequence

• A receptor protein

What is the process called where molecules bind to each other to trigger a cellular function?

• Cellular respiration

• Amplification

• Binding

• Signal transduction

Which type of signaling involves cells communicating with themselves?

• Paracrine signaling

• Endocrine signaling

• Direct signaling

• Autocrine signaling

How does endocrine signaling send messages?

• Using electrical signals

• Through direct contact

• Via the bloodstream

• Through the air

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NGSS.HS-LS1-3

What process allows a small number of signaling molecules to have a large effect?

• Amplification

• Osmosis

• Diffusion

• Transcription

What is the effect of adrenaline on the liver?

• It slows down glucose production

• It stops glucose production

• It triggers glucose release into the bloodstream

• It converts glucose into fat

What is the primary role of cell communication?

• To consume nutrients

• To maintain homeostasis

• To produce energy

• To replicate DNA

Tags

NGSS.HS-LS1-3