The sympathetic nervous system
a. is always excitatory for smooth muscle
b. innervates only tissues concerned with protecting the body against challenges from the outside environment
c. dominates in rest-and-digest situations
d. contains cholinergic and adrenergic fibers
e. stimulates only effectors that are dually innervated
D
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Which type of gland accumulates its secretion in the cytoplasm of the cell, the cell then ruptures and becomes part of the secretion?
A. Apocrine B. Holocrine C. Merocrine
Why might amputation of an extremity, such as a toe, be required in a person with diabetes?
A. The tissue dies due to apoptosis. B. A decubitus ulcer develops. C. The tissue is damaged due to a neoplasm. D. Usually the tissue is infected with Clostridium bacteria, and gas gangrene develops. E. The tissue dies due to dry gangrene.
The standard unit of heat energy used in energy balance is the ____________________
Fill in the blank(s) with correct word
The plasma membrane of a neuron is more permeable to potassium ions because
A. of its positive electrical charge. B. there are more leak ion channels for K+ than Na+. C. protein molecules cannot exit through the cell membrane. D. calcium ions block Na+ and Cl- channels. E. there are more leak ion channels for Na+ than K+.