Frogs have only one ventricle. What's an apparent shortcoming of frog hearts?
a. can't generate enough blood pressure with only one ventricle
b. O2?rich and O2?poor blood from R and L atria will mix in single ventricle
c. problem selectively directing O2?rich blood to body or O2? poor blood to lungs
d. b and c
Answer: d. b and c
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A) nitrogenous wastes B) fibrinogen C) albumin D) glucose E) platelets
The hormone that causes the formation of the corpus luteum and is also the ovulation hormone is:
a. estrogen b. LH c. FSH d. progesterone
Which statement is false regarding the oropharynx?
A. It houses the paired palatine tonsils. B. It is located posterior to the oral cavity. C. It houses the lingual tonsils. D. It houses the pharyngeal tonsil. E. It extends from the soft palate to the level of the hyoid bone.
The outermost layer of the digestive tract, which is composed of a thin layer of areolar tissue and simple squamous epithelium, is called the ________.
A. mucosa (mucous membrane) B. lumen C. serosa (mesentery) D. submucosa E. muscularis externa