What is the function of the scrotum?
What will be an ideal response?
The scrotum positions the testes outside of the abdominal cavity, which is essential to normal development of spermatozoa, which require a temperature of 1.1 degrees C (2 degrees F lower than the normal temperature within the abdominal cavity. The spermatic cord, which contains the nerves and blood supply to the testes, provides continuity with the rest of the body. The musculature of the scrotum is able to raise and lower the testes in response to temperature and other physiological changes.
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Which of the following correctly matches the valve to its function?
A. Aortic valve-permits one-way blood flow from the right ventricle to the pulmonary trunk B. Mitral valve-permits one-way blood flow from the left atrium to the left ventricle C. Tricuspid valve-permits one-way blood flow from the right to the left atrium D. Pulmonary valve-permits one-way blood flow from the left ventricle to the aorta
A section that would divide the body into mirror images would be ________
A) A frontal section B) A transverse section C) A cross section D) A midsagittal section
Which type of vessel consists of a single layer of endothelium?
A) None of the listed responses is correct. B) arteries C) veins D) capillaries
Where does most nutrient reabsorption occur?
A) 2 B) 3 C) 4 D) 5 E) 6