Which of the following organic groups does hemoglobin belong to?
A. nucleic acid
B. vitamin
C. lipid
D. protein
E. carbohydrate
D
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Label B is pointing to
A) dense connective tissue.
B) fat.
C) hyaline cartilage.
D) compact bone.
E) spongy bone.
Which of the following changes would effect the longest lasting changes in blood pressure?
A. Release of norepinephrine B. Release of antidiuretic hormone C. Increased heart rate D. Release of angiotensin
An incompetent mitral valve may cause blood to back up into the
A. aorta. B. left atrium. C. right atrium. D. left ventricle. E. coronary circulation.
What is acetylcholine?
A) an ion pump on the postsynaptic membrane B) a source of energy for muscle contraction C) a component of thick myofilaments D) an oxygen-binding protein E) a neurotransmitter that stimulates skeletal muscle to contract