Which of the following occurs when the diaphragm

33. Which of the following occurs when the diaphragm contracts?
a. Air is forced out of the lungs.
b. Alveoli decrease in size.
c. The thoracic cavity increases in volume. - Contraction of diaphrgm is an active muscle action.
- It occurs during inhalation.
- The thoracic cavity expands to accomodate the air entering in the lungs.
- Alsong with diaphragm, external intercostal muscles contract to facilitate the act of inhalation.
d. The ribcage contracts
34. Which of the following is a response to the release of antidiuretic hormone (ADH)? 35.Which of the following substances is excreted by sweat glands in response to the breakdown
of proteins and the formation of ammonia?
36.A scientist has noted a possible relationship between a certain chemical substance found in
fish and the occurrence of kidney failure in humans. Which of the following preliminary steps
should the scientist take before conducting a controlled experiment?
37. Which of the following statements best supports the hypothesis that viruses can cause
cancer?
A. Viruses and cancer cells both replicate rapidly.
B. Genes that regulate cell division are found in some viruses.
C. Cellular DNA has sequences related to viral sequences.
D. Cancerous and normal cells share genetic sequences.
38.A researcher is gathering large amounts of data about patients who have a common disease
and the effectiveness of various medications in comparison to placebos.

Which of the following types of graphs is the best way for the researcher to represent data?
39. Which of the following describes the function of a neuron?