Muscles that can be controlled and precisely and delicately have few muscle fibers
Indicate whether the statement is true or false.
T
Biology & Microbiology
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In vertebrates, the central nervous system (CNS) consists of the ____
a. brain and spinal cord b. brain and gray matter c. spinal cord and gray matter d. brain and reflexes e. spinal cord and nerves
Biology & Microbiology
When the atria are filled and the AV valves are open, blood flows directly into ________
a. the aorta b. the pulmonary circuit c. the systemic circuit d. both ventricles
Biology & Microbiology
Xylem
a. involves mainly the shoot system. b. includes lignin-reinforced cell walls. c. involves the roots. d. involve stomata. e. includes pipelines that conduct water from soil to leaves.
Biology & Microbiology
During which phase of the heartbeat do the ventricles fill with blood?
A) diastole B) systole
Biology & Microbiology