What are the three common causes of hypercortisolism?
What will be an ideal response?
1. adrenal tumor autonomously secretes cortisol (primary hypercortisolism)
2. pituitary tumor autonomously secretes ACTH (secondary hypercortisolism)
3. iatrogenic hypercortisolism (physician-caused)
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Neuronal stimulation of skeletal muscle is always excitatory, whereas neuronal stimulation of smooth muscle may be excitatory or inhibitory.
Answer the following statement true (T) or false (F)
Which of the following factors would NOT tend to increase systemic arterial blood pressure?
A. Increased venous return B. Increased blood volume C. Increased parasympathetic stimulation D. Increased sympathetic stimulation E. Increased activity of the skeletal muscle pump
What is the best description of a tetanic contraction in a skeletal muscle cell?
A. A single action potential in the motor neuron causes a sustained contraction. B. A very large amplitude action potential in the motor neuron causes a very strong contraction in the skeletal muscle cell. C. Multiple action potentials in the motor neuron cause a sustained contraction. D. Repeated action potentials from the motor neuron summate into a sustained depolarization of the motor end plate, causing a sustained contraction. E. The action potential in the muscle cell is prolonged to last as long as the contraction.
What physical signs would be expected in a person whose blood calcium was abnormally low?
What will be an ideal response?