1. Which of the following would be an example of a sensor? B. interneurons relay
ID: 3509230 • Letter: 1
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1. Which of the following would be an example of a sensor? B. interneurons relaying signals to blood vessel dilation in skeletal muscle C. thermoreceptors detecting increased temperature due to fever D. body temperature at 98.6 OF E. two of the choices are correct. 2. Which of the following statements is true of positive feedback? A the action of the effector is unchanged regarding the direction of the initial stimulus. B. the action of the effector increases in the direction of the initial stimulus. C. the action of the effector decreases from the direction of the initial stimulus. D. the action of the effector decreases from the direction of the initial stimulus, then increases E. two of the choices are correct Which of the following is NOT an example of positive feedback? 3. A. rising levels of estrogen stimulates the release of luteinizing hormone (LH) which further stimulates the release of estrogen B. contractions of the uterus push the fetus against the cervix, triggering oxytocin release into the bloodstream; oxytocin then stimulates stronger contractions of the uterus. C. an increase in carbon dioxide concentration of the blood stimulates breathing, which increases the rate at which carbon dioxide is eliminated from the body D thrombocytes secrete chemical messengers following damage to a blood vessel, which recruits factors to create a plug E. two of the choices are correct. 4. Cells that aid in the movement of food would be described as A. cuboidal epithelium. B. stratified epithelium. C. skeletal muscle. D. smooth muscle. E. two of the choices are correct Diffusion of oxygen and carbon dioxide would be due to which type of cells? A. stratified squamous epithelium B. simple squamous epithelium C. reticular connective tissue D. smooth muscle E. two of the choices are correct. Membranes can be formed by A. nervous B. muscular 5. tissue. 6. C. neuroglial D. epithelial E. two of the choices are correct Which of the following is NOT a major organ of the circulatory system? A. spleen B. heart 7. C. lymphatic vessels D. blood vessels E. two of the choices are correct. Which type of connective tissue is characterized by a liquid extracellular matrix? A. bone B. blood 8. C. adipose D. irregular dense connective tissue E. two of the choices are correct.Explanation / Answer
2. Answer is B. In positive feedback the action of the effector increases in the direction of initial stimulus.
3. Answer is C.increase in Co2 stimulates breathing and causes reduction in amount of Co2 which is negative feedback..
4. Answer is D. Smooth muscles of the digestive tract helps in propelling or moving the food..
5. Answer is B.simple squamous epithelium. Diffusion of gases occur at the level of alveoli and capillaries. Both are lined by simple squamous epithelium.
6. Answer is D..membranes can be formed by epithelial tissue. Two types of body membrane are epithelial membrane and connective tissue membrane.
7. Answer is E. Spleen and lymphatics are not major organs of circulatory system. They belong to lymphatic system.
8. Answer is B. Blood is the connective tissue with liqiud extracellular matrix which is plasma.
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