Unit 4.1 Cell Communication

Multiple Choice

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

• ligand
• second messenger
• protein kinase
• receptor protein

Multiple Choice

All cells respond to the same ligand with the same response.

• True

• False

Multiple Choice

__________ signaling acts on the cell secreting it.

• Endocrine

• Autocrine

• Paracrine

• Pleiotropy

Multiple Choice

This is an example of

• short distance

• cell to cell

• long-distance signaling

• autocrine

Multiple Choice

_____________ signaling acts in nearby cells

• Endocrine

• Autocrine

• Paracrine

• Juxtacrine

Multiple Choice

This is an example of

• paracrine signaling
• synaptic signaling
• long-distance signaling
• all of the above

Multiple Choice

An example of DIRECT cell communication is:

• White blood cells bumping into each other sharing antigen info

• Neurons communicating across a synapse

• Hormones traveling through the blood stream to target tissues

Multiple Choice

An example of LOCAL cell communication is:

• White blood cells bumping into each other sharing antigen info

• Neurons communicating across a synapse

• Hormones traveling through the blood stream to target tissues

Multiple Choice

what type of cell communication is being shown in the image?

• Paracrine

• Endocrine

• Juxtacrine

• Autocrine

Fill in the Blanks

Cells most often communicate with each other via chemical signals, such as

, which travel between cells to trigger specific responses.

Multiple Choice

Hormones are used in ____ signaling.

• endocrine
• juxtacrine
• autocrine
• paracrine

Open Ended

Compare and contrast local and long-distance signaling in animal cells. What are the key differences in how signals are transmitted and received?

Multiple Choice

Why is cell communication important for multicellular organisms?

• It allows cells to coordinate activities and maintain homeostasis.

• It helps cells to divide uncontrollably.

• It prevents cells from interacting with their environment.

• It causes cells to lose their identity.