final in physiology

Which two organ systems work to correct pH imbalances in the body?

• respiratory and urinary

• urinary and endocrine

• digestive and respiratory

• endocrine and nervous

The monomer of the carbohydrates is the:

• fatty acid.

• amino acid.

• nucleotide.

• monosaccharide.

Select the simplest sugar:

• sucrose

• lactose

• glucose

• starch

Glucose, galactose, and fructose have the molecular formula C6H12O6 but have different arrangements of atoms. These sugars are:

• isomers.

• disaccharides.

• isotopes.

• polysaccharides.

What forms the basis for the body's steroids?

• testosterone

• glucose

• triglyceride

• cholesterol

The main structural component of cell membranes is:

• phospholipids.

• cholesterol.

• triglycerides.

• steroids.

The maintenance of a relatively constant internal environment is termed:

• homeostasis.

• integration.

• effector control.

• positive feedback.

What part of a feedback loop causes physiological responses to return the variable to the normal homeostatic range?

• receptor (sensor)

• stimulus

• effector

• control center

A cell or organ that responds to the directions of the control center in a negative feedback loop is termed a(n):

• stimulus.

• effector.

• receptor.

• regulator.

When you go outside on a hot summer day, your body temperature heats up above the normal range. Receptors in your brain detect the change in body temperature. The brain activates nerve cells that send messages to sweat glands, causing the body temperature to fall as the sweat evaporates from the skin. What part of this feedback loop is the stimulus?

• increased body temperature

• brain

• nerve cells

• sweat glands