What causes systole -the contraction of cardiac ventricular cells?
a. action potentials from motor neuronsb.action potentials from sympathetic neurons
c. release of neurotransmitter from autorhythmic cardiac cells onto contractile cells
d. spontaneous depolarization of autorhythmic cells spreads to contractile cell membranes
Answer: d. spontaneous depolarization of autorhythmic cells spreads to contractile cell membranes
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Atrial natriuretic peptide is a hormone that is made in the atria of the heart. The influence of this hormone is to ________.
A) enhance atrial contractions B) activate the renin-angiotensin mechanism C) prevent pH changes caused by organic acid D) reduce blood pressure and blood volume by inhibiting sodium and water retention
The potential space between the _______ membranes is called the pleural cavity
Fill in the blank(s) with correct word
The joint between the femur and coxal bone at the hip is an example of a ________ joint.
A. pivot B. hinge C. gliding D. ball-and-socket
Which tissue is located in the region labeled "2"?
A) stratified squamous epithelium B) areolar connective tissue C) adipose tissue D) cartilage and blood E) reticular connective tissues