Sperm cells are produced in the ________ and complete maturation in the ________.
A. seminiferous tubules; vas deferens
B. seminiferous tubules; prostate gland
C. epididymis; testes
D. ductus deferens; epididymis
E. seminiferous tubules; epididymis
Answer: E
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Assume that the import of a particular amino acid across the plasma membrane is observed (1 ) to occur only down its concentration gradient and (2 ) to slow when a different but similar amino acid is added to the extracellular fluid. The movement of the amino acid through the membrane is most likely by
A) osmosis. B) diffusion. C) facilitated diffusion. D) active transport. E) pinocytosis.
A structure that is composed of two or more tissues would be a(n) ________.
A) complex tissue B) organ system C) organ D) complex cell
Examples of receptors that are always active are
A) mechanoreceptors. B) chemoreceptors. C) tonic receptors. D) tactile receptors. E) phasic receptors.
The following is a list of vessels and structures that are associated with the heart
1. right atrium 2. left atrium 3. right ventricle 4. left ventricle 5. venae cavae 6. aorta 7. pulmonary trunk 8. pulmonary veins What is the correct order for the flow of blood entering from the systemic circulation? A) 1, 2, 7, 8, 3, 4, 6, 5 B) 1, 7, 3, 8, 2, 4, 6, 5 C) 5, 1, 3, 7, 8, 2, 4, 6 D) 5, 3, 1, 7, 8, 4, 2, 6 E) 5, 1, 3, 8, 7, 2, 4, 6