Energy to perform prolonged, endurance exercise is produced from the anaerobic energy system.
a. true
b. false
b. false
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Before a stoma opens, ____
a. the level of carbon dioxide inside the leaf increases b. potassium ions are actively transported out of guard cells c. potassium ions are actively transported into guard cells d. the turgor pressure inside the guard cells decreases e. water moves by osmosis out of the guard cells
Which of the following is a junction between two
neurons? a. Schwann cell b. chemical synapse c. unsheathed node d. sodium gate e. all of these
The deficiency of the enzyme glucose-6-phosphate dehydrogenase (G6PD) is inherited as a recessive gene on the X chromosome in humans. A phenotypically normal woman (whose father had G6PD) is married to a normal man. What fraction of their sons would be expected to have G6PD?
A) 1/4 B) zero C) 1/2 D) 100% E) 1/3
Phagocytosis is a type of ________ in which a cell engulfs another cell
A) endocytosis B) passive transport C) exocytosis D) active transport E) facilitated diffusion