Norepinephrine has the following effect on pacemaker cells:
A) Increased sodium influx.
B) Increased potassium influx.
C) Increased ATPase activity.
D) Decreased calcium influx.
Answer: A
You might also like to view...
The lymphatic system _______________________.
a. eliminates nitrogenous wastes from the body b. promotes growth and development c. cleanses the blood of pathogens and other debris d. transport blood through the body
The skin is ________ to the bones
A) Medial B) Inferior C) Deep D) Superficial
When follicular cells of the thyroid are stimulated to secrete thyroid hormone (TH), they take up TH precursors from the inside of the follicle, transport and enzymatically modify them within a lysosome, and release TH to the blood
Indicate whether this statement is true or false.
Dendritic or Langerhans cells:
a. contain melanin b. are epidermal stem cells c. add strength to the epidermis d. help provide immunity