Which type of epithelial tissue is found lining the heart, blood vessels and lymphatic vessels?
a) Simple squamous epithelium
b) Simple cuboidal epithelium
c) Stratified squamous epithelium
d) Stratified cuboidal epithelium
e) Simple columnar epithelium
Answer: a
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You conduct an experiment on twenty 18-year-old male subjects to see how various intensities of exercise influence heart rate. Which of the following is/are considered an independent variable?
A) heart rate B) age of subjects C) intensity of exercise D) sex of subjects E) More than one of the answers is correct.
How does the skin work closely with the skeletal system?
A. It protects against infection. B. It produces sweat. C. It produces vitamin D. D. It stores fat.
The process by which double-stranded, homologous chromosomes exchange genetic material is known as
A. crossing over, and it occurs in interphase. B. crossing over, and it occurs in mitosis. C. crossing over, and it occurs in meiosis. D. interphase, and it occurs in meiosis. E. interphase, and it occurs in mitosis.
Centenarians are
A) people in the military. B) people who die just before their 100th birthdays. C) people who live past 100 years. D) people who live past 90.