What is the most common sequence of information flow through a neuron?
a. nucleus, axon, axon hillock end foot.
b. dendrite, nucleus, axon hillock, axon
c. dendrite, nucleus, axon, axon hillock
d. dendrite, telodendria, nucleus, axon
Ans: b. dendrite, nucleus, axon hillock, axon
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Which of the following statements about hydrostatic skeletons is false?
A. Longitudinal muscle contractions increase the length of the body cavity. B. Hydrostatic skeletons are found in many vascular plants and almost all multicellular animals. C. Movement is produced by muscles that exert pressure against a fluid-filled cavity. D. Intervertebral discs and cartilage are examples of hydrostatic elements in the vertebrate skeletal system. E. Circular and longitudinal muscles function as antagonists.
Place the following events of fertilization in the correct chronological order.
(1) Sperm contacts the cumulus mass. (2) Proteolytic enzymes are released from the acrosome. (3) Sperm contacts the plasma membrane of the ovum. (4) Sperm passes through the zona pellucida. (5) Sperm increase ATP production. A. 5,1,2,4,3 B. 1,5,4,3,2 C. 1,2,4,3,5 D. 5,2,4,3,1 E. 3,5,2,1,4
What are the products of linear photophosphorylation?
A) heat and fluorescence B) ATP and P700 C) ATP and NADPH D) ADP and NADP E) P700 and P680
The kind of learning that occurs when a reward or punishment is received after an animal has engaged in a behavior is termed
A. operant conditioning. B. instinctive behavior. C. adaptive behavior. D. inoperant conditioning.