A goiter is an abnormal enlarged form of which gland?

A) adrenal
B) pancreas
C) thyroid
D) parathyroid
E) thymus

Protostomes are distinguised from deuterostomes based on

A) the presence or absence of a nervous system.
B) the pattern of embryonic development.
C) the presence or absence of a circulatory system.
D) the presence of absence of cephalization.
E) feeding behaviors.

What is an accessory organ of the digestive system?

A) An organ that food passes through, but it does not secrete any digestive enzymes
B) An organ that is not necessary for the digestion process
C) An organ that contributes secretions into the alimentary canal, but food does not pass through it
D) An organ that is part of the alimentary canal
E) An organ that accomplishes mechanical digestion of food

Which of the following would result from a reduced function of the Na⁺ channels in the SA node?

A) Depolarization would be delayed.
B) The heart rate would decrease.
C) Repolarization would not occur.
D) The plateau phase would be shorter.
E) Depolarization would be delayed, and the heart rate would decrease.