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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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

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

During which phase of the heartbeat do the ventricles fill with blood?

A) diastole B) systole

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