If We Were Able to Artificially Alter the Membrane Permeability

question 43

Multiple Choice

If we were able to artificially alter the membrane permeability of pacemaker cells so that sodium influx is more rapid, .

• A) heart rate would decrease, but blood pressure would rise due to the excess sodium present
• B) potassium channels compensate and no change in heart rate would occur
• C) tetanic contraction would occur due to the short absolute refractory period of cardiac muscle
• D) threshold is reached more quickly and heart rate would increase

---

Definitions:

Securities Commissions

Governmental or regulatory bodies responsible for overseeing and regulating the securities and investments market, ensuring fair practices.

Enforcement Agencies

Governmental or authoritative bodies responsible for ensuring compliance with laws, regulations, and standards within their jurisdiction.

Accounting Standards

Rules and guidelines that companies must follow when reporting financial data.

Corporate Structure

Describes the organization and hierarchy of a company, including its departments, divisions, and roles, to facilitate management and operational efficiency.