You can be outside on an day where the air temperature is 85oF for hours without getting cold. However, you will get cold in 85oF water before too long unless you are very active. This difference is due to

BONUS If the membranes of the cardiac muscle cells in the SA node become more permeable to potassium ions,

Fish in a marine environment must maintain a relatively constant ion concentration in their tissues and blood. How do the chloride cells in the gills aid fish in the removal of excess ions?

Which of the following statements about the control of blood volume and blood pressure is NOT true?

The two organ systems that work together to regulate most aspects of the body’s water balance are

Atherosclerosis ____.​

BONUS If the membranes of the cardiac muscle cells in the SA node become more permeable to potassium ions,

The “QRS” complex visible in a normal electrocardiogram is associated with the

Freshwater flatworms have this type of system for osmoregulation.

Functions of the kidneys include all but one of the following. Identify the exception.