Answer the following statements true (T) or false (F)
1.Negative feedback is the most common way that living organisms maintain homeostasis.
2.If body temperature is too high, the hypothalamus stimulates blood vessels in the skin to constrict.
3.The nervous system of a cat is more similar to the nervous system of a human than to the nervous system of a crayfish.
4.Damage to the pons would lead to problems with posture.
5.The autonomic nervous system controls voluntary muscles involved in processes such as moving legs while consciously walking.
1.TRUE
2.FALSE
3.TRUE
4.TRUE
5.FALSE
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Which body process most often involves in a negative feedback system?
a. hybridization b. reproduction c. pH adjustment d. homeostasis e. evaporation
Which of these statements about the coronary arteries is true?
A. The left coronary artery supplies the anterior wall of the heart and most of the left ventricle. B. The right coronary artery supplies most of the right ventricle. C. Blood flow through the coronary arteries is greatest during ventricular diastole (relaxation). D. A heart attack occurs if a coronary artery is blocked. E. All of these are true.
Gravitropism is a plant's
A) ability to form an abscission layer, so that the fruits and leaves fall from the plant. B) ability to grow only upward. C) apical dominance. D) response to stress-inducing situations. E) directional response to gravity.
Allosteric enzymes ____.
A. have regions that bind with inhibitor or activator molecules B. are associated with important energy-carrying nucleotides C. are not affected by temperature or pH D. have two active sites E. have a broader range of working conditions