Damage to the sinoatrial node in humans _____
A) is a major contributor to heart attacks
B) would block conductance between the bundle branches and the Purkinje fibers
C) would have a negative effect on peripheral resistance
D) would disrupt the rate and timing of cardiac muscle contractions
E) would have a direct effect on blood pressure monitors in the aorta
Answer: D
You might also like to view...
Which of the following is not an adaptation to bipedalism in early hominids?
a. curvature of the spine b. shorter pelvis c. alignment of the big toes with the rest of the toes d. decrease in the length of the legs relative to the arms e. moving the foramen magnum to the base of the skull
The gametophyte is the dominant stage in the life cycle for which of the following plant groups?
a. club mosses b. whisk ferns c. liverworts d. horsetails e. ferns
In human females, what process causes milk production?
A. Stimulation of the alveoli of the mammary glands by prolactin from the anterior pituitary gland B. Stimulation of the alveoli of the mammary glands by oxytocin from the posterior pituitary gland C. Stimulation of the alveoli of the mammary glands by prolactin from the posterior pituitary gland D. Stimulation of the alveoli of the mammary glands by LH from the anterior pituitary gland E. Stimulation of the alveoli of the mammary glands by oxytocin from the anterior pituitary gland
Which is an example of a known type of inherited cancer?
a. bone cancer b. lung cancer c. retinoblastoma d. basal cell carcinoma e. adenocarcinoma of the cervix