What is a chronotropic factor?
A. Anything that changes the heart rate
B. The cardiac inhibitory center that uses parasympathetic neurons of the vagus nerve to keep the SA node at 70?80 beats/minute
C. The cardiac accelerator center that uses sympathetic neurons to stimulate the SA and AV nodes to speed up the heart rate
D. All of the answers are correct.
Answer: D
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Which of the following leads to inflammation, enhancement of phagocytosis and lysis of microbes?
a) Classical complement system b) Alternative complement system c) Apoptosis d) Classical and Alternative complement systems e) Hapten activation
Reduced vitamin B12 absorption from the small intestine due to reduced intrinsic factor production in the stomach results in condition called
a) hemorrhagic anemia. b) aplastic anemia. c) megaloblastic anemia. d) pernicious anemia. e) iron deficiency anemia.
A lamprey is capable of
A) Tidal ventilation. B) Unidirectional ventilation. C) Both A and B D) Neither A nor B
Compare the SNS with the ANS
A) The SNS consists of the brain and spinal cord. The ANS provides conscious and subconscious control over skeletal muscles. B) The SNS provides conscious and subconscious control over skeletal muscles. The ANS consists of the brain and spinal cord. C) The SNS provides conscious and subconscious control over skeletal muscles. The ANS controls the visceral effectors: smooth muscle, glands, cardiac muscle, and adipocytes. D) The SNS controls the visceral effectors: smooth muscle, glands, cardiac muscle, and adipocytes. The ANS provides conscious and subconscious control over skeletal muscles. E) The SNS controls the muscular visceral effectors: smooth muscle and cardiac muscle. The ANS controls the other visceral effectors: glands and adipocytes.