Which one of the following statements is TRUE regarding arterioles and arteries?
A) Arterioles and arteries transport blood from capillaries to veins.
B) Blood pressure in arterioles is greater than the blood pressure in arteries.
C) Arterioles are smaller and have less smooth muscle than arteries.
D) Arteries do not contain valves, whereas arterioles do.
E) Small sphincter muscles regulate the flow of blood from arteries into arterioles.
C
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Which of the following are examples of potential energy associated with our food consumption and metabolism?
When a cell "burns" food, electrons are released from chemical bonds in the food, and passed through an electron transport chain generating a proton gradient. As the protons pass through an ATPase the energy is used to generate ATP. A. electrons moving through the electron transport chain, and protons moving through ATPase B. electrons in chemical bonds of food molecules, proton gradients, and ATP molecules C. electrons from food molecules moving through the electron transport chain, and a proton gradient D. protons moving through ATPase by facilitated diffusion, ATP molecules E. All of the answer choices are correct.
The human genome contains about __________ genes
a. 25,000 b. 45,000 c. 60,000 d. 80,000 e. 120,000
What statement is NOT true about the human nervous system?
A. The autonomic nervous system controls glands and smooth muscles of the viscera. B. The central nervous system consists of the brain and spinal cord. C. The somatic nervous system controls skeletal muscles. D. The somatic nervous system is part of the peripheral nervous system. E. The somatic nervous system is further divided into the sympathetic and parasympathetic divisions.
The primary but not only process responsible for the modifications that occur in organisms over geological time is:
a. genetic mutation. b. natural selection. c. morphological (phenotypic) modification. d. increase in fitness.