Question 1

Which of the following best describes the difference between paracrine and endocrine hormone signaling?

Accepted Answer

Paracrine signaling targets nearby cells, while endocrine signaling targets cells far away.

Question 2

A hormone is released into the bloodstream and travels to distant organs to exert its effect. What type of signaling is this?

Accepted Answer

Endocrine signaling

Question 3

Which of the following statements about lipid hormones is correct?

Accepted Answer

Lipid hormones are hydrophobic and typically bind to intracellular receptors.

Question 4

Which type of hormone would most likely bind to a receptor inside the cytoplasm or nucleus?

Accepted Answer

Lipid hormone

Question 5

A signaling molecule is released by a cell and acts only on nearby cells. What is this type of signaling called?

Accepted Answer

Paracrine signaling

Question 6

Which of the following is a property of hormones that have intracellular receptors?

Accepted Answer

They are lipophilic.

Question 7

Which of the following hormones is most likely to diffuse through the plasma membrane and bind to an intracellular receptor?

Accepted Answer

Estrogen

Question 8

A hormone binds to a receptor on the cell surface and triggers a signaling cascade. What is most likely true about this hormone?

Accepted Answer

It is hydrophilic and cannot cross the plasma membrane.

Question 9

Which of the following is NOT a characteristic of endocrine hormones?

Accepted Answer

They act only on cells in the immediate vicinity of their release.

Question 10

Which of the following best explains why lipid hormones can diffuse through the plasma membrane?

Accepted Answer

They are hydrophobic and can pass through the lipid bilayer.

Question 11

A hormone is released by a cell and acts on itself. What type of signaling is this?

Accepted Answer

Autocrine signaling

Question 12

Which of the following is true about non-lipid hormones?

Accepted Answer

They bind to receptors in the plasma membrane.

Question 13

Which of the following is a common misconception about paracrine signaling?

Accepted Answer

It involves hormones traveling through the bloodstream.

Question 14

Which of the following molecules is most likely to have a receptor located in the cytoplasm or nucleus?

Accepted Answer

Steroid hormone

Question 15

Which of the following is a correct statement about the structure of lipid hormones?

Accepted Answer

They are hydrophobic and derived from cholesterol.

Question 16

Which of the following best describes the main difference between hormones with intracellular receptors and those with cell membrane receptors?

Accepted Answer

Hormones with intracellular receptors tend to be lipophilic.

Question 17

Which of the following is most likely to be true for a hormone that is an amino acid derivative?

Accepted Answer

It binds to cell membrane receptors.

Question 18

Which of the following is a real-world example of endocrine signaling?

Accepted Answer

The pancreas releasing insulin into the bloodstream to regulate blood glucose.

Question 19

Which of the following is a property of hormones that bind to cell membrane receptors?

Accepted Answer

They are hydrophilic.

Question 20

Which equation best represents the diffusion of lipid hormones through the plasma membrane?

Accepted Answer

$$D = \frac{kT}{6 \pi \eta r}$$

Hormone Signaling: Paracrine, Endocrine, and Lipid Hormones

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