Which of the Following Statements Is FALSE

question 25

Multiple Choice

Which of the following statements is FALSE?

• A) Synaptic input onto skeletal muscle cells is always excitatory, whereas inputs to smooth muscle cells may be either excitatory or inhibitory.
• B) A single smooth muscle cell may be innervated by both a sympathetic neuron and a parasympathetic neuron.
• C) Contractile activity of smooth muscle cells does not normally require Ca²⁺.
• D) In the absence of any neural input, skeletal muscle cannot generate tension.
• E) Ca²⁺ that activates contraction of smooth muscles can come from either the ECF or from the sarcoplasmic reticulum.

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Definitions:

Persistent Posttraumatic Stress Disorder

A chronic condition characterized by severe anxiety and distress following exposure to a traumatic event.

Hallucinations

Perceptions in a conscious and awake state in the absence of external stimuli which have qualities of real perception, often seen in psychiatric conditions or drug use.

Schizophrenia

A severe mental disorder characterized by distortions in thinking, perception, emotions, language, sense of self, and behavior.

DSM

Diagnostic and Statistical Manual of Mental Disorders; a manual published by the American Psychiatric Association that categorizes and defines mental disorders.