Which organelle is enclosed with two membranes and has cristae extending inward from the inner membrane?
A. Endoplasmic reticulum
B. Nucleus
C. Lysosome
D. Golgi complex
E. Mitochondrion
E. Mitochondrion
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Oxytocin:
a. is released by the posterior pituitary gland b. stimulates uterine contraction c. uses a positive feedback mechanism d. all of the above
The partial pressure of oxygen in the pulmonary veins is
a. about 40 mmHg b. equivalent to alveolar partial pressure c. dramatically different than pulmonary arteries partial pressure d. equivalent to the partial pressure of oxygen in the arteriolar ends of systemic capillaries e. all of the above
The right ventricle pumps out blood low in oxygen content, whereas the left ventricle pumps out blood high in oxygen content
Indicate whether the statement is true or false
The nucleus of every human cell contains how many chromosomes??
A) ?23 B) ?46 C) ?69 D) ?92