A chemical imbalance in the blood can cause the heart to stop pumping blood, which in turn will cause other tissues and organs to cease functioning. This observation supports the view that
A) all organisms are composed of cells.
B) all levels of organization within an organism are interdependent.
C) chemical molecules make up cells.
D) blood has magical properties.
E) congenital defects can be life-threatening.
Answer: B
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Cerebrospinal fluid
A. helps maintain a stable ionic concentration in the brain and spinal cord. B. mixes with blood to nourish brain and spinal cord tissues. C. has no nutritive function and is only protective. D. has the same composition as capillary fluids.
Contractile activity in both skeletal muscle and multiunit smooth muscle is ____
a. myogenic b. phasic c. tonic d. clonic e. neurogenic
Describe differences between the structure of a duplicated chromosome before mitosis and the chromosome produced by separation of two chromatids during mitosis
What will be an ideal response?
An unknown molecule was detected in a tissue sample. The molecule is composed of carbon, hydrogen, and oxygen; appears to be a branching polymer; and is hydrophilic. This molecule is most likely a ________.
A. nucleic acid B. protein C. carbohydrate D. lipid