Binding of Epinephrine to β1 Adrenergic Receptors in the Heart

question 26

Multiple Choice

Binding of epinephrine to β1 adrenergic receptors in the heart causes

• A) production of second messengers that activate protein kinase A and phosphorylation of myosin heads
• B) inhibition of Ca²⁺ ATPase in the sarcoplasmic reticulum and decreased Ca²⁺ uptake
• C) opening of voltage gated Na⁺ channels and depolarization
• D) no effect, heart does not have functional β1 receptors

---

Definitions:

Expected Claims

An estimation of the amount and frequency of claims a company might expect within a certain period, often used in insurance and risk management.

Marginal Utility

is the additional satisfaction or utility a consumer receives from consuming an additional unit of a good or service.

Income

The money received by an individual or business for work, from investments, or from other sources.

Families

Groups of individuals related by blood, marriage, or other significant relationships who typically live together and share economic and social responsibilities.