Which of the following is NOT true of a gene?
A. It is all the triplets needed to make a functional RNA or protein.
B. It is a segment of a DNA molecule.
C. Each chromosome contains one gene.
D. It is the functional unit of heredity.
E. All of these are true of a gene.
C
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Match the following:
A) Spatial summation B) Threshold stimulus C) Subthreshold stimulus D) Temporal summation 1) Numerous nerve impulses arriving at a synapse at closely timed intervals exert a cumulative effect. 2) Stimulation of a postsynaptic neuron by many terminals at the same time. 3) An insufficient stimulus. 4) Any stimulus below this intensity will result in no response in a neuron.
The fetal connection between the pulmonary trunk and the aorta that allows blood to bypass the lungs is the ductus ________.
Fill in the blank(s) with the appropriate word(s).
In the liver, the _____ may play a role in producing the enzymes that help detoxify drugs.
A) mitochondria B) rough endoplasmic reticulum C) smooth endoplasmic reticulum D) Golgi apparatus
What structure transports bile from the liver to the bile duct?
A) Hepatopancreatic duct B) Cystic duct C) Common hepatic duct D) Accessory pancreatic duct