When the nervous system signals a muscle to contract, ________ ion channels open.
A. phosphorus
B. sodium
C. myosin
D. actin
Answer: B
Anatomy & Physiology
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Breathing, which involves the physical movement of air into and out of the lungs, is __________.
a. pulmonary ventilation b. alveolar ventilation c. internal respiration d. gas diffusion
Anatomy & Physiology
The most common type of joint inflammation is called
A) rheumatism. B) degenerative joint disease. C) rheumatoid arthritis. D) osteoporosis. E) gouty arthritis.
Anatomy & Physiology
A long, unbranched polysaccharide found in the extracellular matrix of connective tissue is ________.
A. tropocollagen B. hyaluronic acid C. proteoglycan D. chondronectin
Anatomy & Physiology
The release of a mature egg from the ovary is called ________.
A. ovulation B. fertilization C. menses D. menopause
Anatomy & Physiology