What creates the pulse?
A. The diastole of the ventricles
B. Constriction of the arterioles
C. Ejection of blood from the left ventricle into the aorta
D. The compliance of the arteries
Answer: C
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One key advantage associated with bilateral symmetry in animals is
A) An increase in speed. B) The presence of a coelom. C) The evolution of limbs. D) The evolution of cephalization.
While drinking a cola, you start laughing, causing some of it to come out of your nose. Why does this hurt when drinking cola normally does not?
A. The nasopharynx is lined by pseudostratified columnar epithelium while the oropharynx and laryngopharynx are lined by stratified squamous epithelium. B. There is a larger blood supply to the nasal cavity than oral cavity. C. There are more free nerve endings in the nasal cavity than oral cavity. D. The nasopharynx is lined by a serous membrane while the oropharynx and larngopharynx are lined by a mucous membrane.
Which of the following traits is a sex-linked inheritance?
A) albino pigmentation B) red hair C) hemophilia D) Huntington's disease E) sickle cell anemia
Calcium-induced calcium release occurs when
A. calcium from the sarcoplasmic reticulum stimulates the movement of calcium into the cell through the plasma membrane. B. calcium is released from both the sarcoplasmic reticulum and the cardiac muscle cell. C. the eflux of calcium from the cell results in depolarization. D. calcium entering through the plasma membrane stimulates release of calcium from the sarcoplasmic reticulum.