Glucagon raises blood glucose levels by

A) stimulating the liver to take up glucose.
B) inhibiting gluconeogenesis.
C) stimulating gluconeogenesis.
D) inhibiting fatty acid mobilization.
E) inhibiting amino acid mobilization.

What type of epithelium contains thin, flat cells stacked upon each other?

A) simple squamous
B) stratified squamous
C) simple cuboidal
D) stratified cuboidal
E) simple columnar

What is the serous membrane that surrounds the heart?

A) peritoneum
B) pleural cavity
C) pericardium
D) none of the above

The function of the spongy layer of a leaf is primarily

A) photosynthesis.
B) gas exchange.
C) vascular transport.
D) protein synthesis.
E) as a shock absorber.

What is the function of the basal cells of the taste buds?

A) They are the taste receptor cells.
B) They transmit sensory impulses from the taste receptor cells to the 3 cranial nerves associated with gustation.
C) They surround and protect the taste buds.
D) They replace damaged taste cells every 7-10 days.
E) They provide physical support to the taste receptor cells.

Which chemical interactions is/are classified as true chemical bonds?

A) hydrogen bonds only
B) ionic bonds only
C) covalent bonds only
D) ionic and covalent bonds
E) hydrogen, ionic, and covalent bonds

Endothelium

A) Simple squamous epithelium of capillaries
B) Drain capillary networks
C) Regulate blood flow into capillaries
D) Do not have fenestrae
E) Bypass capillary beds

If all of the muscle fibers in the neck, trunk, and legs were to totally relax, the body would collapse. What is the state called where some of the fibers in a particular muscle are always contracted?

A) twitch
B) threshold
C) tetanus
D) tone
E) summation